diff --git a/Documentation/SubmitChecklist b/Documentation/SubmitChecklist
index bd23dc0..6491b2c 100644
--- a/Documentation/SubmitChecklist
+++ b/Documentation/SubmitChecklist
@@ -80,3 +80,7 @@
 23: Tested after it has been merged into the -mm patchset to make sure
     that it still works with all of the other queued patches and various
     changes in the VM, VFS, and other subsystems.
+
+24: Avoid whitespace damage such as indenting with spaces or whitespace
+    at the end of lines.  You can test this by feeding the patch to
+    "git apply --check --whitespace=error-all"
diff --git a/Documentation/SubmittingPatches b/Documentation/SubmittingPatches
index b0d0043..a417b25 100644
--- a/Documentation/SubmittingPatches
+++ b/Documentation/SubmittingPatches
@@ -363,7 +363,8 @@
 The "summary phrase" in the email's Subject should concisely
 describe the patch which that email contains.  The "summary
 phrase" should not be a filename.  Do not use the same "summary
-phrase" for every patch in a whole patch series.
+phrase" for every patch in a whole patch series (where a "patch
+series" is an ordered sequence of multiple, related patches).
 
 Bear in mind that the "summary phrase" of your email becomes
 a globally-unique identifier for that patch.  It propagates
diff --git a/Documentation/cpu-hotplug.txt b/Documentation/cpu-hotplug.txt
index cc60d29..b6d24c2 100644
--- a/Documentation/cpu-hotplug.txt
+++ b/Documentation/cpu-hotplug.txt
@@ -217,14 +217,17 @@
 A: The following happen, listed in no particular order :-)
 
 - A notification is sent to in-kernel registered modules by sending an event
-  CPU_DOWN_PREPARE
+  CPU_DOWN_PREPARE or CPU_DOWN_PREPARE_FROZEN, depending on whether or not the
+  CPU is being offlined while tasks are frozen due to a suspend operation in
+  progress
 - All process is migrated away from this outgoing CPU to a new CPU
 - All interrupts targeted to this CPU is migrated to a new CPU
 - timers/bottom half/task lets are also migrated to a new CPU
 - Once all services are migrated, kernel calls an arch specific routine
   __cpu_disable() to perform arch specific cleanup.
 - Once this is successful, an event for successful cleanup is sent by an event
-  CPU_DEAD.
+  CPU_DEAD (or CPU_DEAD_FROZEN if tasks are frozen due to a suspend while the
+  CPU is being offlined).
 
   "It is expected that each service cleans up when the CPU_DOWN_PREPARE
   notifier is called, when CPU_DEAD is called its expected there is nothing
@@ -242,9 +245,11 @@
 
 		switch (action) {
 		case CPU_ONLINE:
+		case CPU_ONLINE_FROZEN:
 			foobar_online_action(cpu);
 			break;
 		case CPU_DEAD:
+		case CPU_DEAD_FROZEN:
 			foobar_dead_action(cpu);
 			break;
 		}
diff --git a/Documentation/device-mapper/delay.txt b/Documentation/device-mapper/delay.txt
new file mode 100644
index 0000000..15adc55
--- /dev/null
+++ b/Documentation/device-mapper/delay.txt
@@ -0,0 +1,26 @@
+dm-delay
+========
+
+Device-Mapper's "delay" target delays reads and/or writes
+and maps them to different devices.
+
+Parameters:
+    <device> <offset> <delay> [<write_device> <write_offset> <write_delay>]
+
+With separate write parameters, the first set is only used for reads.
+Delays are specified in milliseconds.
+
+Example scripts
+===============
+[[
+#!/bin/sh
+# Create device delaying rw operation for 500ms
+echo "0 `blockdev --getsize $1` delay $1 0 500" | dmsetup create delayed
+]]
+
+[[
+#!/bin/sh
+# Create device delaying only write operation for 500ms and
+# splitting reads and writes to different devices $1 $2
+echo "0 `blockdev --getsize $1` delay $1 0 0 $2 0 500" | dmsetup create delayed
+]]
diff --git a/Documentation/fb/arkfb.txt b/Documentation/fb/arkfb.txt
new file mode 100644
index 0000000..e8487a9
--- /dev/null
+++ b/Documentation/fb/arkfb.txt
@@ -0,0 +1,68 @@
+
+	arkfb - fbdev driver for ARK Logic chips
+	========================================
+
+
+Supported Hardware
+==================
+
+	ARK 2000PV chip
+	ICS 5342 ramdac
+
+	- only BIOS initialized VGA devices supported
+	- probably not working on big endian
+
+
+Supported Features
+==================
+
+	*  4 bpp pseudocolor modes (with 18bit palette, two variants)
+	*  8 bpp pseudocolor mode (with 18bit palette)
+	* 16 bpp truecolor modes (RGB 555 and RGB 565)
+	* 24 bpp truecolor mode (RGB 888)
+	* 32 bpp truecolor mode (RGB 888)
+	* text mode (activated by bpp = 0)
+	* doublescan mode variant (not available in text mode)
+	* panning in both directions
+	* suspend/resume support
+
+Text mode is supported even in higher resolutions, but there is limitation to
+lower pixclocks (i got maximum about 70 MHz, it is dependent on specific
+hardware). This limitation is not enforced by driver. Text mode supports 8bit
+wide fonts only (hardware limitation) and 16bit tall fonts (driver
+limitation). Unfortunately character attributes (like color) in text mode are
+broken for unknown reason, so its usefulness is limited.
+
+There are two 4 bpp modes. First mode (selected if nonstd == 0) is mode with
+packed pixels, high nibble first. Second mode (selected if nonstd == 1) is mode
+with interleaved planes (1 byte interleave), MSB first. Both modes support
+8bit wide fonts only (driver limitation).
+
+Suspend/resume works on systems that initialize video card during resume and
+if device is active (for example used by fbcon).
+
+
+Missing Features
+================
+(alias TODO list)
+
+	* secondary (not initialized by BIOS) device support
+   	* big endian support
+	* DPMS support
+	* MMIO support
+	* interlaced mode variant
+	* support for fontwidths != 8 in 4 bpp modes
+	* support for fontheight != 16 in text mode
+	* hardware cursor
+	* vsync synchronization
+	* feature connector support
+	* acceleration support (8514-like 2D)
+
+
+Known bugs
+==========
+
+	* character attributes (and cursor) in text mode are broken
+
+--
+Ondrej Zajicek <santiago@crfreenet.org>
diff --git a/Documentation/fb/vt8623fb.txt b/Documentation/fb/vt8623fb.txt
new file mode 100644
index 0000000..f654576
--- /dev/null
+++ b/Documentation/fb/vt8623fb.txt
@@ -0,0 +1,64 @@
+
+	vt8623fb - fbdev driver for graphics core in VIA VT8623 chipset
+	===============================================================
+
+
+Supported Hardware
+==================
+
+	VIA VT8623 [CLE266] chipset and	its graphics core
+		(known as CastleRock or Unichrome)
+
+I tested vt8623fb on VIA EPIA ML-6000
+
+
+Supported Features
+==================
+
+	*  4 bpp pseudocolor modes (with 18bit palette, two variants)
+	*  8 bpp pseudocolor mode (with 18bit palette)
+	* 16 bpp truecolor mode (RGB 565)
+	* 32 bpp truecolor mode (RGB 888)
+	* text mode (activated by bpp = 0)
+	* doublescan mode variant (not available in text mode)
+	* panning in both directions
+	* suspend/resume support
+	* DPMS support
+
+Text mode is supported even in higher resolutions, but there is limitation to
+lower pixclocks (maximum about 100 MHz). This limitation is not enforced by
+driver. Text mode supports 8bit wide fonts only (hardware limitation) and
+16bit tall fonts (driver limitation).
+
+There are two 4 bpp modes. First mode (selected if nonstd == 0) is mode with
+packed pixels, high nibble first. Second mode (selected if nonstd == 1) is mode
+with interleaved planes (1 byte interleave), MSB first. Both modes support
+8bit wide fonts only (driver limitation).
+
+Suspend/resume works on systems that initialize video card during resume and
+if device is active (for example used by fbcon).
+
+
+Missing Features
+================
+(alias TODO list)
+
+	* secondary (not initialized by BIOS) device support
+	* MMIO support
+	* interlaced mode variant
+	* support for fontwidths != 8 in 4 bpp modes
+	* support for fontheight != 16 in text mode
+	* hardware cursor
+	* video overlay support
+	* vsync synchronization
+	* acceleration support (8514-like 2D, busmaster transfers)
+
+
+Known bugs
+==========
+
+	* cursor disable in text mode doesn't work
+
+
+--
+Ondrej Zajicek <santiago@crfreenet.org>
diff --git a/Documentation/md.txt b/Documentation/md.txt
index 2202f5d..5818628 100644
--- a/Documentation/md.txt
+++ b/Documentation/md.txt
@@ -178,6 +178,21 @@
      The size should be at least PAGE_SIZE (4k) and should be a power
      of 2.  This can only be set while assembling an array
 
+  layout
+     The "layout" for the array for the particular level.  This is
+     simply a number that is interpretted differently by different
+     levels.  It can be written while assembling an array.
+
+  reshape_position
+     This is either "none" or a sector number within the devices of
+     the array where "reshape" is up to.  If this is set, the three
+     attributes mentioned above (raid_disks, chunk_size, layout) can
+     potentially have 2 values, an old and a new value.  If these
+     values differ, reading the attribute returns
+        new (old)
+     and writing will effect the 'new' value, leaving the 'old'
+     unchanged.
+
   component_size
      For arrays with data redundancy (i.e. not raid0, linear, faulty,
      multipath), all components must be the same size - or at least
@@ -193,11 +208,6 @@
      1.2 (newer format in varying locations) or "none" indicating that
      the kernel isn't managing metadata at all.
 
-  layout
-     The "layout" for the array for the particular level.  This is
-     simply a number that is interpretted differently by different
-     levels.  It can be written while assembling an array.
-
   resync_start
      The point at which resync should start.  If no resync is needed,
      this will be a very large number.  At array creation it will
@@ -259,29 +269,6 @@
          like active, but no writes have been seen for a while (safe_mode_delay).
 
 
-   sync_speed_min
-   sync_speed_max
-     This are similar to /proc/sys/dev/raid/speed_limit_{min,max}
-     however they only apply to the particular array.
-     If no value has been written to these, of if the word 'system'
-     is written, then the system-wide value is used.  If a value,
-     in kibibytes-per-second is written, then it is used.
-     When the files are read, they show the currently active value
-     followed by "(local)" or "(system)" depending on whether it is
-     a locally set or system-wide value.
-
-   sync_completed
-     This shows the number of sectors that have been completed of
-     whatever the current sync_action is, followed by the number of
-     sectors in total that could need to be processed.  The two
-     numbers are separated by a '/'  thus effectively showing one
-     value, a fraction of the process that is complete.
-
-   sync_speed
-     This shows the current actual speed, in K/sec, of the current
-     sync_action.  It is averaged over the last 30 seconds.
-
-
 As component devices are added to an md array, they appear in the 'md'
 directory as new directories named
       dev-XXX
@@ -412,6 +399,35 @@
       Note that the numbers are 'bit' numbers, not 'block' numbers.
       They should be scaled by the bitmap_chunksize.
 
+   sync_speed_min
+   sync_speed_max
+     This are similar to /proc/sys/dev/raid/speed_limit_{min,max}
+     however they only apply to the particular array.
+     If no value has been written to these, of if the word 'system'
+     is written, then the system-wide value is used.  If a value,
+     in kibibytes-per-second is written, then it is used.
+     When the files are read, they show the currently active value
+     followed by "(local)" or "(system)" depending on whether it is
+     a locally set or system-wide value.
+
+   sync_completed
+     This shows the number of sectors that have been completed of
+     whatever the current sync_action is, followed by the number of
+     sectors in total that could need to be processed.  The two
+     numbers are separated by a '/'  thus effectively showing one
+     value, a fraction of the process that is complete.
+
+   sync_speed
+     This shows the current actual speed, in K/sec, of the current
+     sync_action.  It is averaged over the last 30 seconds.
+
+   suspend_lo
+   suspend_hi
+     The two values, given as numbers of sectors, indicate a range
+     within the array where IO will be blocked.  This is currently
+     only supported for raid4/5/6.
+
+
 Each active md device may also have attributes specific to the
 personality module that manages it.
 These are specific to the implementation of the module and could
diff --git a/Documentation/power/userland-swsusp.txt b/Documentation/power/userland-swsusp.txt
index 000556c..e00c6cf 100644
--- a/Documentation/power/userland-swsusp.txt
+++ b/Documentation/power/userland-swsusp.txt
@@ -93,21 +93,23 @@
 	to resume the system from RAM if there's enough battery power or restore
 	its state on the basis of the saved suspend image otherwise)
 
-SNAPSHOT_PMOPS - enable the usage of the pmops->prepare, pmops->enter and
-	pmops->finish methods (the in-kernel swsusp knows these as the "platform
-	method") which are needed on many machines to (among others) speed up
-	the resume by letting the BIOS skip some steps or to let the system
-	recognise the correct state of the hardware after the resume (in
-	particular on many machines this ensures that unplugged AC
-	adapters get correctly detected and that kacpid does not run wild after
-	the resume).  The last ioctl() argument can take one of the three
-	values, defined in kernel/power/power.h:
+SNAPSHOT_PMOPS - enable the usage of the hibernation_ops->prepare,
+	hibernate_ops->enter and hibernation_ops->finish methods (the in-kernel
+	swsusp knows these as the "platform method") which are needed on many
+	machines to (among others) speed up the resume by letting the BIOS skip
+	some steps or to let the system recognise the correct state of the
+	hardware after the resume (in particular on many machines this ensures
+	that unplugged AC adapters get correctly detected and that kacpid does
+	not run wild after the resume).  The last ioctl() argument can take one
+	of the three values, defined in kernel/power/power.h:
 	PMOPS_PREPARE - make the kernel carry out the
-		pm_ops->prepare(PM_SUSPEND_DISK) operation
+		hibernation_ops->prepare() operation
 	PMOPS_ENTER - make the kernel power off the system by calling
-		pm_ops->enter(PM_SUSPEND_DISK)
+		hibernation_ops->enter()
 	PMOPS_FINISH - make the kernel carry out the
-		pm_ops->finish(PM_SUSPEND_DISK) operation
+		hibernation_ops->finish() operation
+	Note that the actual constants are misnamed because they surface
+	internal kernel implementation details that have changed.
 
 The device's read() operation can be used to transfer the snapshot image from
 the kernel.  It has the following limitations:
diff --git a/Documentation/vm/slabinfo.c b/Documentation/vm/slabinfo.c
index 41710cc..686a8e0 100644
--- a/Documentation/vm/slabinfo.c
+++ b/Documentation/vm/slabinfo.c
@@ -16,6 +16,7 @@
 #include <stdarg.h>
 #include <getopt.h>
 #include <regex.h>
+#include <errno.h>
 
 #define MAX_SLABS 500
 #define MAX_ALIASES 500
@@ -41,12 +42,15 @@
 } aliasinfo[MAX_ALIASES];
 
 int slabs = 0;
+int actual_slabs = 0;
 int aliases = 0;
 int alias_targets = 0;
 int highest_node = 0;
 
 char buffer[4096];
 
+int show_empty = 0;
+int show_report = 0;
 int show_alias = 0;
 int show_slab = 0;
 int skip_zero = 1;
@@ -59,6 +63,15 @@
 int show_single_ref = 0;
 int show_totals = 0;
 int sort_size = 0;
+int set_debug = 0;
+int show_ops = 0;
+
+/* Debug options */
+int sanity = 0;
+int redzone = 0;
+int poison = 0;
+int tracking = 0;
+int tracing = 0;
 
 int page_size;
 
@@ -76,20 +89,33 @@
 
 void usage(void)
 {
-	printf("slabinfo [-ahnpvtsz] [slab-regexp]\n"
+	printf("slabinfo 5/7/2007. (c) 2007 sgi. clameter@sgi.com\n\n"
+		"slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
 		"-a|--aliases           Show aliases\n"
+		"-d<options>|--debug=<options> Set/Clear Debug options\n"
+		"-e|--empty		Show empty slabs\n"
+		"-f|--first-alias       Show first alias\n"
 		"-h|--help              Show usage information\n"
+		"-i|--inverted          Inverted list\n"
+		"-l|--slabs             Show slabs\n"
 		"-n|--numa              Show NUMA information\n"
+		"-o|--ops		Show kmem_cache_ops\n"
 		"-s|--shrink            Shrink slabs\n"
-		"-v|--validate          Validate slabs\n"
+		"-r|--report		Detailed report on single slabs\n"
+		"-S|--Size              Sort by size\n"
 		"-t|--tracking          Show alloc/free information\n"
 		"-T|--Totals            Show summary information\n"
-		"-l|--slabs             Show slabs\n"
-		"-S|--Size              Sort by size\n"
+		"-v|--validate          Validate slabs\n"
 		"-z|--zero              Include empty slabs\n"
-		"-f|--first-alias       Show first alias\n"
-		"-i|--inverted          Inverted list\n"
 		"-1|--1ref              Single reference\n"
+		"\nValid debug options (FZPUT may be combined)\n"
+		"a / A          Switch on all debug options (=FZUP)\n"
+		"-              Switch off all debug options\n"
+		"f / F          Sanity Checks (SLAB_DEBUG_FREE)\n"
+		"z / Z          Redzoning\n"
+		"p / P          Poisoning\n"
+		"u / U          Tracking\n"
+		"t / T          Tracing\n"
 	);
 }
 
@@ -143,11 +169,10 @@
 void set_obj(struct slabinfo *s, char *name, int n)
 {
 	char x[100];
+	FILE *f;
 
 	sprintf(x, "%s/%s", s->name, name);
-
-	FILE *f = fopen(x, "w");
-
+	f = fopen(x, "w");
 	if (!f)
 		fatal("Cannot write to %s\n", x);
 
@@ -155,6 +180,26 @@
 	fclose(f);
 }
 
+unsigned long read_slab_obj(struct slabinfo *s, char *name)
+{
+	char x[100];
+	FILE *f;
+	int l;
+
+	sprintf(x, "%s/%s", s->name, name);
+	f = fopen(x, "r");
+	if (!f) {
+		buffer[0] = 0;
+		l = 0;
+	} else {
+		l = fread(buffer, 1, sizeof(buffer), f);
+		buffer[l] = 0;
+		fclose(f);
+	}
+	return l;
+}
+
+
 /*
  * Put a size string together
  */
@@ -226,7 +271,7 @@
 
 void first_line(void)
 {
-	printf("Name                 Objects   Objsize    Space "
+	printf("Name                   Objects Objsize    Space "
 		"Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
 }
 
@@ -246,10 +291,7 @@
 					return best;
 			}
 	}
-	if (best)
-		return best;
-	fatal("Cannot find alias for %s\n", find->name);
-	return NULL;
+	return best;
 }
 
 unsigned long slab_size(struct slabinfo *s)
@@ -257,6 +299,126 @@
 	return 	s->slabs * (page_size << s->order);
 }
 
+void slab_numa(struct slabinfo *s, int mode)
+{
+	int node;
+
+	if (strcmp(s->name, "*") == 0)
+		return;
+
+	if (!highest_node) {
+		printf("\n%s: No NUMA information available.\n", s->name);
+		return;
+	}
+
+	if (skip_zero && !s->slabs)
+		return;
+
+	if (!line) {
+		printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
+		for(node = 0; node <= highest_node; node++)
+			printf(" %4d", node);
+		printf("\n----------------------");
+		for(node = 0; node <= highest_node; node++)
+			printf("-----");
+		printf("\n");
+	}
+	printf("%-21s ", mode ? "All slabs" : s->name);
+	for(node = 0; node <= highest_node; node++) {
+		char b[20];
+
+		store_size(b, s->numa[node]);
+		printf(" %4s", b);
+	}
+	printf("\n");
+	if (mode) {
+		printf("%-21s ", "Partial slabs");
+		for(node = 0; node <= highest_node; node++) {
+			char b[20];
+
+			store_size(b, s->numa_partial[node]);
+			printf(" %4s", b);
+		}
+		printf("\n");
+	}
+	line++;
+}
+
+void show_tracking(struct slabinfo *s)
+{
+	printf("\n%s: Kernel object allocation\n", s->name);
+	printf("-----------------------------------------------------------------------\n");
+	if (read_slab_obj(s, "alloc_calls"))
+		printf(buffer);
+	else
+		printf("No Data\n");
+
+	printf("\n%s: Kernel object freeing\n", s->name);
+	printf("------------------------------------------------------------------------\n");
+	if (read_slab_obj(s, "free_calls"))
+		printf(buffer);
+	else
+		printf("No Data\n");
+
+}
+
+void ops(struct slabinfo *s)
+{
+	if (strcmp(s->name, "*") == 0)
+		return;
+
+	if (read_slab_obj(s, "ops")) {
+		printf("\n%s: kmem_cache operations\n", s->name);
+		printf("--------------------------------------------\n");
+		printf(buffer);
+	} else
+		printf("\n%s has no kmem_cache operations\n", s->name);
+}
+
+const char *onoff(int x)
+{
+	if (x)
+		return "On ";
+	return "Off";
+}
+
+void report(struct slabinfo *s)
+{
+	if (strcmp(s->name, "*") == 0)
+		return;
+	printf("\nSlabcache: %-20s  Aliases: %2d Order : %2d\n", s->name, s->aliases, s->order);
+	if (s->hwcache_align)
+		printf("** Hardware cacheline aligned\n");
+	if (s->cache_dma)
+		printf("** Memory is allocated in a special DMA zone\n");
+	if (s->destroy_by_rcu)
+		printf("** Slabs are destroyed via RCU\n");
+	if (s->reclaim_account)
+		printf("** Reclaim accounting active\n");
+
+	printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
+	printf("------------------------------------------------------------------------\n");
+	printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
+			s->object_size, s->slabs, onoff(s->sanity_checks),
+			s->slabs * (page_size << s->order));
+	printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
+			s->slab_size, s->slabs - s->partial - s->cpu_slabs,
+			onoff(s->red_zone), s->objects * s->object_size);
+	printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
+			page_size << s->order, s->partial, onoff(s->poison),
+			s->slabs * (page_size << s->order) - s->objects * s->object_size);
+	printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
+			s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
+			(s->slab_size - s->object_size) * s->objects);
+	printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
+			s->align, s->objs_per_slab, onoff(s->trace),
+			((page_size << s->order) - s->objs_per_slab * s->slab_size) *
+			s->slabs);
+
+	ops(s);
+	show_tracking(s);
+	slab_numa(s, 1);
+}
 
 void slabcache(struct slabinfo *s)
 {
@@ -265,7 +427,18 @@
 	char flags[20];
 	char *p = flags;
 
-	if (skip_zero && !s->slabs)
+	if (strcmp(s->name, "*") == 0)
+		return;
+
+	if (actual_slabs == 1) {
+		report(s);
+		return;
+	}
+
+	if (skip_zero && !show_empty && !s->slabs)
+		return;
+
+	if (show_empty && s->slabs)
 		return;
 
 	store_size(size_str, slab_size(s));
@@ -303,48 +476,128 @@
 		flags);
 }
 
-void slab_numa(struct slabinfo *s)
+/*
+ * Analyze debug options. Return false if something is amiss.
+ */
+int debug_opt_scan(char *opt)
 {
-	int node;
+	if (!opt || !opt[0] || strcmp(opt, "-") == 0)
+		return 1;
 
-	if (!highest_node)
-		fatal("No NUMA information available.\n");
-
-	if (skip_zero && !s->slabs)
-		return;
-
-	if (!line) {
-		printf("\nSlab             Node ");
-		for(node = 0; node <= highest_node; node++)
-			printf(" %4d", node);
-		printf("\n----------------------");
-		for(node = 0; node <= highest_node; node++)
-			printf("-----");
-		printf("\n");
+	if (strcasecmp(opt, "a") == 0) {
+		sanity = 1;
+		poison = 1;
+		redzone = 1;
+		tracking = 1;
+		return 1;
 	}
-	printf("%-21s ", s->name);
-	for(node = 0; node <= highest_node; node++) {
-		char b[20];
 
-		store_size(b, s->numa[node]);
-		printf(" %4s", b);
-	}
-	printf("\n");
-	line++;
+	for ( ; *opt; opt++)
+	 	switch (*opt) {
+		case 'F' : case 'f':
+			if (sanity)
+				return 0;
+			sanity = 1;
+			break;
+		case 'P' : case 'p':
+			if (poison)
+				return 0;
+			poison = 1;
+			break;
+
+		case 'Z' : case 'z':
+			if (redzone)
+				return 0;
+			redzone = 1;
+			break;
+
+		case 'U' : case 'u':
+			if (tracking)
+				return 0;
+			tracking = 1;
+			break;
+
+		case 'T' : case 't':
+			if (tracing)
+				return 0;
+			tracing = 1;
+			break;
+		default:
+			return 0;
+		}
+	return 1;
 }
 
-void show_tracking(struct slabinfo *s)
+int slab_empty(struct slabinfo *s)
 {
-	printf("\n%s: Calls to allocate a slab object\n", s->name);
-	printf("---------------------------------------------------\n");
-	if (read_obj("alloc_calls"))
-		printf(buffer);
+	if (s->objects > 0)
+		return 0;
 
-	printf("%s: Calls to free a slab object\n", s->name);
-	printf("-----------------------------------------------\n");
-	if (read_obj("free_calls"))
-		printf(buffer);
+	/*
+	 * We may still have slabs even if there are no objects. Shrinking will
+	 * remove them.
+	 */
+	if (s->slabs != 0)
+		set_obj(s, "shrink", 1);
 
+	return 1;
+}
+
+void slab_debug(struct slabinfo *s)
+{
+	if (sanity && !s->sanity_checks) {
+		set_obj(s, "sanity", 1);
+	}
+	if (!sanity && s->sanity_checks) {
+		if (slab_empty(s))
+			set_obj(s, "sanity", 0);
+		else
+			fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
+	}
+	if (redzone && !s->red_zone) {
+		if (slab_empty(s))
+			set_obj(s, "red_zone", 1);
+		else
+			fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
+	}
+	if (!redzone && s->red_zone) {
+		if (slab_empty(s))
+			set_obj(s, "red_zone", 0);
+		else
+			fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
+	}
+	if (poison && !s->poison) {
+		if (slab_empty(s))
+			set_obj(s, "poison", 1);
+		else
+			fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
+	}
+	if (!poison && s->poison) {
+		if (slab_empty(s))
+			set_obj(s, "poison", 0);
+		else
+			fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
+	}
+	if (tracking && !s->store_user) {
+		if (slab_empty(s))
+			set_obj(s, "store_user", 1);
+		else
+			fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
+	}
+	if (!tracking && s->store_user) {
+		if (slab_empty(s))
+			set_obj(s, "store_user", 0);
+		else
+			fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
+	}
+	if (tracing && !s->trace) {
+		if (slabs == 1)
+			set_obj(s, "trace", 1);
+		else
+			fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
+	}
+	if (!tracing && s->trace)
+		set_obj(s, "trace", 1);
 }
 
 void totals(void)
@@ -673,7 +926,7 @@
 
 	for (a = aliasinfo; a < aliasinfo + aliases; a++) {
 
-		for(s = slabinfo; s < slabinfo + slabs; s++)
+		for (s = slabinfo; s < slabinfo + slabs; s++)
 			if (strcmp(a->ref, s->name) == 0) {
 				a->slab = s;
 				s->refs++;
@@ -704,7 +957,7 @@
 					continue;
 				}
 			}
-			printf("\n%-20s <- %s", a->slab->name, a->name);
+			printf("\n%-12s <- %s", a->slab->name, a->name);
 			active = a->slab->name;
 		}
 		else
@@ -729,7 +982,12 @@
 
 		a = find_one_alias(s);
 
-		s->name = a->name;
+		if (a)
+			s->name = a->name;
+		else {
+			s->name = "*";
+			actual_slabs--;
+		}
 	}
 }
 
@@ -748,11 +1006,14 @@
 	char *t;
 	int count;
 
+	if (chdir("/sys/slab"))
+		fatal("SYSFS support for SLUB not active\n");
+
 	dir = opendir(".");
 	while ((de = readdir(dir))) {
 		if (de->d_name[0] == '.' ||
-				slab_mismatch(de->d_name))
-			continue;
+			(de->d_name[0] != ':' && slab_mismatch(de->d_name)))
+				continue;
 		switch (de->d_type) {
 		   case DT_LNK:
 		   	alias->name = strdup(de->d_name);
@@ -807,6 +1068,7 @@
 	}
 	closedir(dir);
 	slabs = slab - slabinfo;
+	actual_slabs = slabs;
 	aliases = alias - aliasinfo;
 	if (slabs > MAX_SLABS)
 		fatal("Too many slabs\n");
@@ -825,34 +1087,37 @@
 
 
 		if (show_numa)
-			slab_numa(slab);
-		else
-		if (show_track)
+			slab_numa(slab, 0);
+		else if (show_track)
 			show_tracking(slab);
-		else
-		if (validate)
+		else if (validate)
 			slab_validate(slab);
-		else
-		if (shrink)
+		else if (shrink)
 			slab_shrink(slab);
-		else {
-			if (show_slab)
-				slabcache(slab);
-		}
+		else if (set_debug)
+			slab_debug(slab);
+		else if (show_ops)
+			ops(slab);
+		else if (show_slab)
+			slabcache(slab);
 	}
 }
 
 struct option opts[] = {
 	{ "aliases", 0, NULL, 'a' },
-	{ "slabs", 0, NULL, 'l' },
-	{ "numa", 0, NULL, 'n' },
-	{ "zero", 0, NULL, 'z' },
-	{ "help", 0, NULL, 'h' },
-	{ "validate", 0, NULL, 'v' },
+	{ "debug", 2, NULL, 'd' },
+	{ "empty", 0, NULL, 'e' },
 	{ "first-alias", 0, NULL, 'f' },
-	{ "shrink", 0, NULL, 's' },
-	{ "track", 0, NULL, 't'},
+	{ "help", 0, NULL, 'h' },
 	{ "inverted", 0, NULL, 'i'},
+	{ "numa", 0, NULL, 'n' },
+	{ "ops", 0, NULL, 'o' },
+	{ "report", 0, NULL, 'r' },
+	{ "shrink", 0, NULL, 's' },
+	{ "slabs", 0, NULL, 'l' },
+	{ "track", 0, NULL, 't'},
+	{ "validate", 0, NULL, 'v' },
+	{ "zero", 0, NULL, 'z' },
 	{ "1ref", 0, NULL, '1'},
 	{ NULL, 0, NULL, 0 }
 };
@@ -864,10 +1129,9 @@
 	char *pattern_source;
 
 	page_size = getpagesize();
-	if (chdir("/sys/slab"))
-		fatal("This kernel does not have SLUB support.\n");
 
-	while ((c = getopt_long(argc, argv, "afhil1npstvzTS", opts, NULL)) != -1)
+	while ((c = getopt_long(argc, argv, "ad::efhil1noprstvzTS",
+						opts, NULL)) != -1)
 	switch(c) {
 		case '1':
 			show_single_ref = 1;
@@ -875,6 +1139,14 @@
 		case 'a':
 			show_alias = 1;
 			break;
+		case 'd':
+			set_debug = 1;
+			if (!debug_opt_scan(optarg))
+				fatal("Invalid debug option '%s'\n", optarg);
+			break;
+		case 'e':
+			show_empty = 1;
+			break;
 		case 'f':
 			show_first_alias = 1;
 			break;
@@ -887,6 +1159,12 @@
 		case 'n':
 			show_numa = 1;
 			break;
+		case 'o':
+			show_ops = 1;
+			break;
+		case 'r':
+			show_report = 1;
+			break;
 		case 's':
 			shrink = 1;
 			break;
@@ -914,8 +1192,8 @@
 
 	}
 
-	if (!show_slab && !show_alias && !show_track
-		&& !validate && !shrink)
+	if (!show_slab && !show_alias && !show_track && !show_report
+		&& !validate && !shrink && !set_debug && !show_ops)
 			show_slab = 1;
 
 	if (argc > optind)
diff --git a/arch/avr32/kernel/process.c b/arch/avr32/kernel/process.c
index 4e4181e..13f9884 100644
--- a/arch/avr32/kernel/process.c
+++ b/arch/avr32/kernel/process.c
@@ -330,13 +330,13 @@
 {
 	struct pt_regs *childregs;
 
-	childregs = ((struct pt_regs *)(THREAD_SIZE + (unsigned long)p->thread_info)) - 1;
+	childregs = ((struct pt_regs *)(THREAD_SIZE + (unsigned long)task_stack_page(p))) - 1;
 	*childregs = *regs;
 
 	if (user_mode(regs))
 		childregs->sp = usp;
 	else
-		childregs->sp = (unsigned long)p->thread_info + THREAD_SIZE;
+		childregs->sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;
 
 	childregs->r12 = 0; /* Set return value for child */
 
@@ -403,7 +403,7 @@
 	if (!p || p == current || p->state == TASK_RUNNING)
 		return 0;
 
-	stack_page = (unsigned long)p->thread_info;
+	stack_page = (unsigned long)task_stack_page(p);
 	BUG_ON(!stack_page);
 
 	/*
diff --git a/arch/avr32/kernel/ptrace.c b/arch/avr32/kernel/ptrace.c
index 8ac74dd..3c36c2d 100644
--- a/arch/avr32/kernel/ptrace.c
+++ b/arch/avr32/kernel/ptrace.c
@@ -24,7 +24,7 @@
 
 static struct pt_regs *get_user_regs(struct task_struct *tsk)
 {
-	return (struct pt_regs *)((unsigned long) tsk->thread_info +
+	return (struct pt_regs *)((unsigned long)task_stack_page(tsk) +
 				  THREAD_SIZE - sizeof(struct pt_regs));
 }
 
diff --git a/arch/blackfin/kernel/asm-offsets.c b/arch/blackfin/kernel/asm-offsets.c
index 41d9a9f..e455f45 100644
--- a/arch/blackfin/kernel/asm-offsets.c
+++ b/arch/blackfin/kernel/asm-offsets.c
@@ -46,7 +46,7 @@
 	DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));
 	DEFINE(TASK_BLOCKED, offsetof(struct task_struct, blocked));
 	DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
-	DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, thread_info));
+	DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, stack));
 	DEFINE(TASK_MM, offsetof(struct task_struct, mm));
 	DEFINE(TASK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
 	DEFINE(TASK_SIGPENDING, offsetof(struct task_struct, pending));
diff --git a/arch/blackfin/kernel/ptrace.c b/arch/blackfin/kernel/ptrace.c
index d7c8e51..e718bb4 100644
--- a/arch/blackfin/kernel/ptrace.c
+++ b/arch/blackfin/kernel/ptrace.c
@@ -73,7 +73,7 @@
 static inline struct pt_regs *get_user_regs(struct task_struct *task)
 {
 	return (struct pt_regs *)
-	    ((unsigned long)task->thread_info +
+	    ((unsigned long)task_stack_page(task) +
 	     (THREAD_SIZE - sizeof(struct pt_regs)));
 }
 
@@ -99,7 +99,7 @@
 	unsigned char *reg_ptr;
 
 	struct pt_regs *regs =
-	    (struct pt_regs *)((unsigned long)task->thread_info +
+	    (struct pt_regs *)((unsigned long)task_stack_page(task) +
 			       (THREAD_SIZE - sizeof(struct pt_regs)));
 	reg_ptr = (char *)regs;
 
@@ -125,7 +125,7 @@
 	char * reg_ptr;
 
 	struct pt_regs *regs =
-	    (struct pt_regs *)((unsigned long)task->thread_info +
+	    (struct pt_regs *)((unsigned long)task_stack_page(task) +
 			       (THREAD_SIZE - sizeof(struct pt_regs)));
 	reg_ptr = (char *)regs;
 
diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index eed6943..114738a 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -45,6 +45,10 @@
 	bool
 	default y
 
+config QUICKLIST
+	bool
+	default y
+
 config ARCH_HAS_ILOG2_U32
 	bool
 	default y
@@ -53,10 +57,6 @@
 	bool
 	default y
 
-config ARCH_USES_SLAB_PAGE_STRUCT
-	bool
-	default y
-
 mainmenu "Fujitsu FR-V Kernel Configuration"
 
 source "init/Kconfig"
diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c
index 515a5ce..9583a33 100644
--- a/arch/frv/kernel/process.c
+++ b/arch/frv/kernel/process.c
@@ -25,12 +25,14 @@
 #include <linux/elf.h>
 #include <linux/reboot.h>
 #include <linux/interrupt.h>
+#include <linux/pagemap.h>
 
 #include <asm/asm-offsets.h>
 #include <asm/uaccess.h>
 #include <asm/system.h>
 #include <asm/setup.h>
 #include <asm/pgtable.h>
+#include <asm/tlb.h>
 #include <asm/gdb-stub.h>
 #include <asm/mb-regs.h>
 
@@ -88,6 +90,8 @@
 		while (!need_resched()) {
 			irq_stat[cpu].idle_timestamp = jiffies;
 
+			check_pgt_cache();
+
 			if (!frv_dma_inprogress && idle)
 				idle();
 		}
diff --git a/arch/frv/mm/pgalloc.c b/arch/frv/mm/pgalloc.c
index 598a26a..7787c3c 100644
--- a/arch/frv/mm/pgalloc.c
+++ b/arch/frv/mm/pgalloc.c
@@ -13,12 +13,12 @@
 #include <linux/slab.h>
 #include <linux/mm.h>
 #include <linux/highmem.h>
+#include <linux/quicklist.h>
 #include <asm/pgalloc.h>
 #include <asm/page.h>
 #include <asm/cacheflush.h>
 
 pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__((aligned(PAGE_SIZE)));
-struct kmem_cache *pgd_cache;
 
 pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
 {
@@ -100,7 +100,7 @@
 		set_page_private(next, (unsigned long) pprev);
 }
 
-void pgd_ctor(void *pgd, struct kmem_cache *cache, unsigned long unused)
+void pgd_ctor(void *pgd)
 {
 	unsigned long flags;
 
@@ -120,7 +120,7 @@
 }
 
 /* never called when PTRS_PER_PMD > 1 */
-void pgd_dtor(void *pgd, struct kmem_cache *cache, unsigned long unused)
+void pgd_dtor(void *pgd)
 {
 	unsigned long flags; /* can be called from interrupt context */
 
@@ -133,7 +133,7 @@
 {
 	pgd_t *pgd;
 
-	pgd = kmem_cache_alloc(pgd_cache, GFP_KERNEL);
+	pgd = quicklist_alloc(0, GFP_KERNEL, pgd_ctor);
 	if (!pgd)
 		return pgd;
 
@@ -143,15 +143,15 @@
 void pgd_free(pgd_t *pgd)
 {
 	/* in the non-PAE case, clear_page_tables() clears user pgd entries */
-	kmem_cache_free(pgd_cache, pgd);
+ 	quicklist_free(0, pgd_dtor, pgd);
 }
 
 void __init pgtable_cache_init(void)
 {
-	pgd_cache = kmem_cache_create("pgd",
-				      PTRS_PER_PGD * sizeof(pgd_t),
-				      PTRS_PER_PGD * sizeof(pgd_t),
-				      SLAB_PANIC,
-				      pgd_ctor,
-				      pgd_dtor);
 }
+
+void check_pgt_cache(void)
+{
+	quicklist_trim(0, pgd_dtor, 25, 16);
+}
+
diff --git a/arch/h8300/kernel/asm-offsets.c b/arch/h8300/kernel/asm-offsets.c
index b78b82a..fc30b4f 100644
--- a/arch/h8300/kernel/asm-offsets.c
+++ b/arch/h8300/kernel/asm-offsets.c
@@ -30,7 +30,7 @@
 	DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));
 	DEFINE(TASK_BLOCKED, offsetof(struct task_struct, blocked));
 	DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
-	DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, thread_info));
+	DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, stack));
 	DEFINE(TASK_MM, offsetof(struct task_struct, mm));
 	DEFINE(TASK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
 
diff --git a/arch/i386/kernel/cpu/intel_cacheinfo.c b/arch/i386/kernel/cpu/intel_cacheinfo.c
index 80b4c5d..e5be819 100644
--- a/arch/i386/kernel/cpu/intel_cacheinfo.c
+++ b/arch/i386/kernel/cpu/intel_cacheinfo.c
@@ -733,9 +733,11 @@
 	sys_dev = get_cpu_sysdev(cpu);
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		cache_add_dev(sys_dev);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		cache_remove_dev(sys_dev);
 		break;
 	}
diff --git a/arch/i386/kernel/cpu/mcheck/therm_throt.c b/arch/i386/kernel/cpu/mcheck/therm_throt.c
index 065005c..5b0a040 100644
--- a/arch/i386/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/i386/kernel/cpu/mcheck/therm_throt.c
@@ -137,10 +137,12 @@
 	mutex_lock(&therm_cpu_lock);
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		err = thermal_throttle_add_dev(sys_dev);
 		WARN_ON(err);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		thermal_throttle_remove_dev(sys_dev);
 		break;
 	}
diff --git a/arch/i386/kernel/cpu/transmeta.c b/arch/i386/kernel/cpu/transmeta.c
index 6471a5a..200fb3f 100644
--- a/arch/i386/kernel/cpu/transmeta.c
+++ b/arch/i386/kernel/cpu/transmeta.c
@@ -77,8 +77,10 @@
 	set_bit(X86_FEATURE_CONSTANT_TSC, c->x86_capability);
 	
 	/* If we can run i686 user-space code, call us an i686 */
-#define USER686 (X86_FEATURE_TSC|X86_FEATURE_CX8|X86_FEATURE_CMOV)
-        if ( c->x86 == 5 && (c->x86_capability[0] & USER686) == USER686 )
+#define USER686 ((1 << X86_FEATURE_TSC)|\
+		 (1 << X86_FEATURE_CX8)|\
+		 (1 << X86_FEATURE_CMOV))
+        if (c->x86 == 5 && (c->x86_capability[0] & USER686) == USER686)
 		c->x86 = 6;
 
 #ifdef CONFIG_SYSCTL
diff --git a/arch/i386/kernel/cpuid.c b/arch/i386/kernel/cpuid.c
index eeae0d9..5c2faa1 100644
--- a/arch/i386/kernel/cpuid.c
+++ b/arch/i386/kernel/cpuid.c
@@ -169,9 +169,11 @@
 
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		cpuid_device_create(cpu);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		device_destroy(cpuid_class, MKDEV(CPUID_MAJOR, cpu));
 		break;
 	}
diff --git a/arch/i386/kernel/microcode.c b/arch/i386/kernel/microcode.c
index cbe7ec8..83f825f 100644
--- a/arch/i386/kernel/microcode.c
+++ b/arch/i386/kernel/microcode.c
@@ -567,7 +567,7 @@
 	return error;
 }
 
-static int apply_microcode_on_cpu(int cpu)
+static int apply_microcode_check_cpu(int cpu)
 {
 	struct cpuinfo_x86 *c = cpu_data + cpu;
 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
@@ -575,8 +575,9 @@
 	unsigned int val[2];
 	int err = 0;
 
+	/* Check if the microcode is available */
 	if (!uci->mc)
-		return -EINVAL;
+		return 0;
 
 	old = current->cpus_allowed;
 	set_cpus_allowed(current, cpumask_of_cpu(cpu));
@@ -614,7 +615,7 @@
 	return err;
 }
 
-static void microcode_init_cpu(int cpu)
+static void microcode_init_cpu(int cpu, int resume)
 {
 	cpumask_t old;
 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
@@ -624,8 +625,7 @@
 	set_cpus_allowed(current, cpumask_of_cpu(cpu));
 	mutex_lock(&microcode_mutex);
 	collect_cpu_info(cpu);
-	if (uci->valid && system_state == SYSTEM_RUNNING &&
-	    !suspend_cpu_hotplug)
+	if (uci->valid && system_state == SYSTEM_RUNNING && !resume)
 		cpu_request_microcode(cpu);
 	mutex_unlock(&microcode_mutex);
 	set_cpus_allowed(current, old);
@@ -702,7 +702,7 @@
 	.name = "microcode",
 };
 
-static int mc_sysdev_add(struct sys_device *sys_dev)
+static int __mc_sysdev_add(struct sys_device *sys_dev, int resume)
 {
 	int err, cpu = sys_dev->id;
 	struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
@@ -711,39 +711,31 @@
 		return 0;
 
 	pr_debug("Microcode:CPU %d added\n", cpu);
-	/* If suspend_cpu_hotplug is set, the system is resuming and we should
-	 * use the data from before the suspend.
-	 */
-	if (suspend_cpu_hotplug) {
-		err = apply_microcode_on_cpu(cpu);
-		if (err)
-			microcode_fini_cpu(cpu);
-	}
-	if (!uci->valid)
-		memset(uci, 0, sizeof(*uci));
+	memset(uci, 0, sizeof(*uci));
 
 	err = sysfs_create_group(&sys_dev->kobj, &mc_attr_group);
 	if (err)
 		return err;
 
-	if (!uci->valid)
-		microcode_init_cpu(cpu);
+	microcode_init_cpu(cpu, resume);
 
 	return 0;
 }
 
+static int mc_sysdev_add(struct sys_device *sys_dev)
+{
+	return __mc_sysdev_add(sys_dev, 0);
+}
+
 static int mc_sysdev_remove(struct sys_device *sys_dev)
 {
 	int cpu = sys_dev->id;
 
 	if (!cpu_online(cpu))
 		return 0;
+
 	pr_debug("Microcode:CPU %d removed\n", cpu);
-	/* If suspend_cpu_hotplug is set, the system is suspending and we should
-	 * keep the microcode in memory for the resume.
-	 */
-	if (!suspend_cpu_hotplug)
-		microcode_fini_cpu(cpu);
+	microcode_fini_cpu(cpu);
 	sysfs_remove_group(&sys_dev->kobj, &mc_attr_group);
 	return 0;
 }
@@ -774,13 +766,34 @@
 
 	sys_dev = get_cpu_sysdev(cpu);
 	switch (action) {
+	case CPU_UP_CANCELED_FROZEN:
+		/* The CPU refused to come up during a system resume */
+		microcode_fini_cpu(cpu);
+		break;
 	case CPU_ONLINE:
 	case CPU_DOWN_FAILED:
 		mc_sysdev_add(sys_dev);
 		break;
+	case CPU_ONLINE_FROZEN:
+		/* System-wide resume is in progress, try to apply microcode */
+		if (apply_microcode_check_cpu(cpu)) {
+			/* The application of microcode failed */
+			microcode_fini_cpu(cpu);
+			__mc_sysdev_add(sys_dev, 1);
+			break;
+		}
+	case CPU_DOWN_FAILED_FROZEN:
+		if (sysfs_create_group(&sys_dev->kobj, &mc_attr_group))
+			printk(KERN_ERR "Microcode: Failed to create the sysfs "
+				"group for CPU%d\n", cpu);
+		break;
 	case CPU_DOWN_PREPARE:
 		mc_sysdev_remove(sys_dev);
 		break;
+	case CPU_DOWN_PREPARE_FROZEN:
+		/* Suspend is in progress, only remove the interface */
+		sysfs_remove_group(&sys_dev->kobj, &mc_attr_group);
+		break;
 	}
 	return NOTIFY_OK;
 }
diff --git a/arch/i386/kernel/msr.c b/arch/i386/kernel/msr.c
index 8cd0a91..0c1069b 100644
--- a/arch/i386/kernel/msr.c
+++ b/arch/i386/kernel/msr.c
@@ -153,9 +153,11 @@
 
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		msr_device_create(cpu);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		device_destroy(msr_class, MKDEV(MSR_MAJOR, cpu));
 		break;
 	}
diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
index 4bec0cb..c05e7e8 100644
--- a/arch/i386/kernel/traps.c
+++ b/arch/i386/kernel/traps.c
@@ -305,7 +305,7 @@
 	       regs->xds & 0xffff, regs->xes & 0xffff, regs->xfs & 0xffff, gs, ss);
 	printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
 		TASK_COMM_LEN, current->comm, current->pid,
-		current_thread_info(), current, current->thread_info);
+		current_thread_info(), current, task_thread_info(current));
 	/*
 	 * When in-kernel, we also print out the stack and code at the
 	 * time of the fault..
diff --git a/arch/i386/mach-generic/probe.c b/arch/i386/mach-generic/probe.c
index a7b3999..74f3da6 100644
--- a/arch/i386/mach-generic/probe.c
+++ b/arch/i386/mach-generic/probe.c
@@ -119,9 +119,7 @@
 	return 0;	
 }
 
-#ifdef CONFIG_SMP
 int hard_smp_processor_id(void)
 {
 	return genapic->get_apic_id(*(unsigned long *)(APIC_BASE+APIC_ID));
 }
-#endif
diff --git a/arch/i386/mach-voyager/voyager_basic.c b/arch/i386/mach-voyager/voyager_basic.c
index 8fe7e45..9b77b39 100644
--- a/arch/i386/mach-voyager/voyager_basic.c
+++ b/arch/i386/mach-voyager/voyager_basic.c
@@ -292,8 +292,8 @@
 void
 mca_nmi_hook(void)
 {
-	__u8 dumpval __attribute__((unused)) = inb(0xf823);
-	__u8 swnmi __attribute__((unused)) = inb(0xf813);
+	__u8 dumpval __maybe_unused = inb(0xf823);
+	__u8 swnmi __maybe_unused = inb(0xf813);
 
 	/* FIXME: assume dump switch pressed */
 	/* check to see if the dump switch was pressed */
diff --git a/arch/i386/pci/init.c b/arch/i386/pci/init.c
index 1cf11af..3de9f9b 100644
--- a/arch/i386/pci/init.c
+++ b/arch/i386/pci/init.c
@@ -6,7 +6,7 @@
    in the right sequence from here. */
 static __init int pci_access_init(void)
 {
-	int type __attribute__((unused)) = 0;
+	int type __maybe_unused = 0;
 
 #ifdef CONFIG_PCI_DIRECT
 	type = pci_direct_probe();
diff --git a/arch/ia64/kernel/err_inject.c b/arch/ia64/kernel/err_inject.c
index d3e9f33..6a49600 100644
--- a/arch/ia64/kernel/err_inject.c
+++ b/arch/ia64/kernel/err_inject.c
@@ -236,9 +236,11 @@
 	sys_dev = get_cpu_sysdev(cpu);
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		err_inject_add_dev(sys_dev);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		err_inject_remove_dev(sys_dev);
 		break;
 	}
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index 1d7cc7e..f8ae709 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -1689,7 +1689,7 @@
 	ti->preempt_count = 1;
 	ti->task = p;
 	ti->cpu = cpu;
-	p->thread_info = ti;
+	p->stack = ti;
 	p->state = TASK_UNINTERRUPTIBLE;
 	cpu_set(cpu, p->cpus_allowed);
 	INIT_LIST_HEAD(&p->tasks);
diff --git a/arch/ia64/kernel/palinfo.c b/arch/ia64/kernel/palinfo.c
index a71df9a..85829e2 100644
--- a/arch/ia64/kernel/palinfo.c
+++ b/arch/ia64/kernel/palinfo.c
@@ -975,9 +975,11 @@
 
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		create_palinfo_proc_entries(hotcpu);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		remove_palinfo_proc_entries(hotcpu);
 		break;
 	}
diff --git a/arch/ia64/kernel/salinfo.c b/arch/ia64/kernel/salinfo.c
index a51f1d0..89f6b13 100644
--- a/arch/ia64/kernel/salinfo.c
+++ b/arch/ia64/kernel/salinfo.c
@@ -582,6 +582,7 @@
 	struct salinfo_data *data;
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		spin_lock_irqsave(&data_saved_lock, flags);
 		for (i = 0, data = salinfo_data;
 		     i < ARRAY_SIZE(salinfo_data);
@@ -592,6 +593,7 @@
 		spin_unlock_irqrestore(&data_saved_lock, flags);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		spin_lock_irqsave(&data_saved_lock, flags);
 		for (i = 0, data = salinfo_data;
 		     i < ARRAY_SIZE(salinfo_data);
diff --git a/arch/ia64/kernel/topology.c b/arch/ia64/kernel/topology.c
index 687500d..94ae3c8 100644
--- a/arch/ia64/kernel/topology.c
+++ b/arch/ia64/kernel/topology.c
@@ -412,9 +412,11 @@
 	sys_dev = get_cpu_sysdev(cpu);
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		cache_add_dev(sys_dev);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		cache_remove_dev(sys_dev);
 		break;
 	}
diff --git a/arch/m68knommu/kernel/asm-offsets.c b/arch/m68knommu/kernel/asm-offsets.c
index b988c7b..7cd183d 100644
--- a/arch/m68knommu/kernel/asm-offsets.c
+++ b/arch/m68knommu/kernel/asm-offsets.c
@@ -31,7 +31,7 @@
 	DEFINE(TASK_PTRACE, offsetof(struct task_struct, ptrace));
 	DEFINE(TASK_BLOCKED, offsetof(struct task_struct, blocked));
 	DEFINE(TASK_THREAD, offsetof(struct task_struct, thread));
-	DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, thread_info));
+	DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, stack));
 	DEFINE(TASK_MM, offsetof(struct task_struct, mm));
 	DEFINE(TASK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
 
diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c
index 761a779..3b27309 100644
--- a/arch/mips/kernel/asm-offsets.c
+++ b/arch/mips/kernel/asm-offsets.c
@@ -82,7 +82,7 @@
 {
 	text("/* MIPS task_struct offsets. */");
 	offset("#define TASK_STATE         ", struct task_struct, state);
-	offset("#define TASK_THREAD_INFO   ", struct task_struct, thread_info);
+	offset("#define TASK_THREAD_INFO   ", struct task_struct, stack);
 	offset("#define TASK_FLAGS         ", struct task_struct, flags);
 	offset("#define TASK_MM            ", struct task_struct, mm);
 	offset("#define TASK_PID           ", struct task_struct, pid);
diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c
index 5dcfab6..b361edb 100644
--- a/arch/mips/kernel/smtc.c
+++ b/arch/mips/kernel/smtc.c
@@ -560,7 +560,7 @@
 	write_tc_gpr_sp(__KSTK_TOS(idle));
 
 	/* global pointer */
-	write_tc_gpr_gp((unsigned long)idle->thread_info);
+	write_tc_gpr_gp((unsigned long)task_thread_info(idle));
 
 	smtc_status |= SMTC_MTC_ACTIVE;
 	write_tc_c0_tchalt(0);
diff --git a/arch/parisc/kernel/asm-offsets.c b/arch/parisc/kernel/asm-offsets.c
index 54fdb95..d3b7917 100644
--- a/arch/parisc/kernel/asm-offsets.c
+++ b/arch/parisc/kernel/asm-offsets.c
@@ -54,7 +54,7 @@
 
 int main(void)
 {
-	DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, thread_info));
+	DEFINE(TASK_THREAD_INFO, offsetof(struct task_struct, stack));
 	DEFINE(TASK_STATE, offsetof(struct task_struct, state));
 	DEFINE(TASK_FLAGS, offsetof(struct task_struct, flags));
 	DEFINE(TASK_SIGPENDING, offsetof(struct task_struct, pending));
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 8f48560..37bc35e 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -58,7 +58,7 @@
 #ifdef CONFIG_PPC64
 	DEFINE(AUDITCONTEXT, offsetof(struct task_struct, audit_context));
 #else
-	DEFINE(THREAD_INFO, offsetof(struct task_struct, thread_info));
+	DEFINE(THREAD_INFO, offsetof(struct task_struct, stack));
 	DEFINE(PTRACE, offsetof(struct task_struct, ptrace));
 #endif /* CONFIG_PPC64 */
 
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index cae39d9..68991c2 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -342,10 +342,12 @@
 
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		register_cpu_online(cpu);
 		break;
 #ifdef CONFIG_HOTPLUG_CPU
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		unregister_cpu_online(cpu);
 		break;
 #endif
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c
index b3a592b..de45aa8 100644
--- a/arch/powerpc/mm/numa.c
+++ b/arch/powerpc/mm/numa.c
@@ -252,12 +252,15 @@
 
 	switch (action) {
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		numa_setup_cpu(lcpu);
 		ret = NOTIFY_OK;
 		break;
 #ifdef CONFIG_HOTPLUG_CPU
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 		unmap_cpu_from_node(lcpu);
 		break;
 		ret = NOTIFY_OK;
diff --git a/arch/ppc/kernel/asm-offsets.c b/arch/ppc/kernel/asm-offsets.c
index c5850a2..e8e9432 100644
--- a/arch/ppc/kernel/asm-offsets.c
+++ b/arch/ppc/kernel/asm-offsets.c
@@ -35,7 +35,7 @@
 main(void)
 {
 	DEFINE(THREAD, offsetof(struct task_struct, thread));
-	DEFINE(THREAD_INFO, offsetof(struct task_struct, thread_info));
+	DEFINE(THREAD_INFO, offsetof(struct task_struct, stack));
 	DEFINE(MM, offsetof(struct task_struct, mm));
 	DEFINE(PTRACE, offsetof(struct task_struct, ptrace));
 	DEFINE(KSP, offsetof(struct thread_struct, ksp));
diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
index ee89b33..81a2b92 100644
--- a/arch/s390/appldata/appldata_base.c
+++ b/arch/s390/appldata/appldata_base.c
@@ -567,9 +567,11 @@
 {
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		appldata_online_cpu((long) hcpu);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		appldata_offline_cpu((long) hcpu);
 		break;
 	default:
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index ec514fe..1375f8a 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -15,7 +15,7 @@
 
 int main(void)
 {
-	DEFINE(__THREAD_info, offsetof(struct task_struct, thread_info),);
+	DEFINE(__THREAD_info, offsetof(struct task_struct, stack),);
 	DEFINE(__THREAD_ksp, offsetof(struct task_struct, thread.ksp),);
 	DEFINE(__THREAD_per, offsetof(struct task_struct, thread.per_info),);
 	DEFINE(__THREAD_mm_segment,
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index b797702..09f028a 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -789,10 +789,12 @@
 
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		if (sysdev_create_file(s, &attr_capability))
 			return NOTIFY_BAD;
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		sysdev_remove_file(s, &attr_capability);
 		break;
 	}
diff --git a/arch/sparc/kernel/asm-offsets.c b/arch/sparc/kernel/asm-offsets.c
index 29d7cfd..6773ed7 100644
--- a/arch/sparc/kernel/asm-offsets.c
+++ b/arch/sparc/kernel/asm-offsets.c
@@ -28,7 +28,7 @@
 	DEFINE(AOFF_task_gid, offsetof(struct task_struct, gid));
 	DEFINE(AOFF_task_euid, offsetof(struct task_struct, euid));
 	DEFINE(AOFF_task_egid, offsetof(struct task_struct, egid));
-	/* DEFINE(THREAD_INFO, offsetof(struct task_struct, thread_info)); */
+	/* DEFINE(THREAD_INFO, offsetof(struct task_struct, stack)); */
 	DEFINE(ASIZ_task_uid,	sizeof(current->uid));
 	DEFINE(ASIZ_task_gid,	sizeof(current->gid));
 	DEFINE(ASIZ_task_euid,	sizeof(current->euid));
diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c
index dc652f2..d0fde36 100644
--- a/arch/sparc64/kernel/traps.c
+++ b/arch/sparc64/kernel/traps.c
@@ -19,6 +19,7 @@
 #include <linux/init.h>
 #include <linux/kdebug.h>
 
+#include <asm/smp.h>
 #include <asm/delay.h>
 #include <asm/system.h>
 #include <asm/ptrace.h>
diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 354cc6b..b9c0f30 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -320,21 +320,7 @@
 
 source "lib/Kconfig"
 
-menu "SCSI support"
-depends on BROKEN
-
-config SCSI
-	tristate "SCSI support"
-
-# This gives us free_dma, which scsi.c wants.
-config GENERIC_ISA_DMA
-	bool
-	depends on SCSI
-	default y
-
-source "arch/um/Kconfig.scsi"
-
-endmenu
+source "drivers/scsi/Kconfig"
 
 source "drivers/md/Kconfig"
 
diff --git a/arch/um/Kconfig.scsi b/arch/um/Kconfig.scsi
deleted file mode 100644
index c291c94..0000000
--- a/arch/um/Kconfig.scsi
+++ /dev/null
@@ -1,58 +0,0 @@
-comment "SCSI support type (disk, tape, CD-ROM)"
-	depends on SCSI
-
-config BLK_DEV_SD
-	tristate "SCSI disk support"
-	depends on SCSI
-
-config SD_EXTRA_DEVS
-	int "Maximum number of SCSI disks that can be loaded as modules"
-	depends on BLK_DEV_SD
-	default "40"
-
-config CHR_DEV_ST
-	tristate "SCSI tape support"
-	depends on SCSI
-
-config BLK_DEV_SR
-	tristate "SCSI CD-ROM support"
-	depends on SCSI
-
-config BLK_DEV_SR_VENDOR
-	bool "Enable vendor-specific extensions (for SCSI CDROM)"
-	depends on BLK_DEV_SR
-
-config SR_EXTRA_DEVS
-	int "Maximum number of CDROM devices that can be loaded as modules"
-	depends on BLK_DEV_SR
-	default "2"
-
-config CHR_DEV_SG
-	tristate "SCSI generic support"
-	depends on SCSI
-
-comment "Some SCSI devices (e.g. CD jukebox) support multiple LUNs"
-	depends on SCSI
-
-#if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then
-config SCSI_DEBUG_QUEUES
-	bool "Enable extra checks in new queueing code"
-	depends on SCSI
-
-#fi
-config SCSI_MULTI_LUN
-	bool "Probe all LUNs on each SCSI device"
-	depends on SCSI
-
-config SCSI_CONSTANTS
-	bool "Verbose SCSI error reporting (kernel size +=12K)"
-	depends on SCSI
-
-config SCSI_LOGGING
-	bool "SCSI logging facility"
-	depends on SCSI
-
-config SCSI_DEBUG
-	tristate "SCSI debugging host simulator (EXPERIMENTAL)"
-	depends on SCSI
-
diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c
index ef36fac..a96ae1a 100644
--- a/arch/um/kernel/skas/process.c
+++ b/arch/um/kernel/skas/process.c
@@ -178,20 +178,23 @@
 
 int external_pid_skas(struct task_struct *task)
 {
-#warning Need to look up userspace_pid by cpu
+	/* FIXME: Need to look up userspace_pid by cpu */
 	return(userspace_pid[0]);
 }
 
 int thread_pid_skas(struct task_struct *task)
 {
-#warning Need to look up userspace_pid by cpu
+	/* FIXME: Need to look up userspace_pid by cpu */
 	return(userspace_pid[0]);
 }
 
 void kill_off_processes_skas(void)
 {
 	if(proc_mm)
-#warning need to loop over userspace_pids in kill_off_processes_skas
+		/*
+		 * FIXME: need to loop over userspace_pids in
+		 * kill_off_processes_skas
+		 */
 		os_kill_ptraced_process(userspace_pid[0], 1);
 	else {
 		struct task_struct *p;
diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index 92a7b59..2d9d2ca 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -239,6 +239,7 @@
 	return ok;
 }
 
+#ifdef UML_CONFIG_MODE_TT
 void init_new_thread_stack(void *sig_stack, void (*usr1_handler)(int))
 {
 	int flags = 0, pages;
@@ -260,6 +261,7 @@
 			      "errno = %d\n", errno);
 	}
 }
+#endif
 
 void init_new_thread_signals(void)
 {
diff --git a/arch/um/os-Linux/skas/mem.c b/arch/um/os-Linux/skas/mem.c
index 8e490ff..5c894632 100644
--- a/arch/um/os-Linux/skas/mem.c
+++ b/arch/um/os-Linux/skas/mem.c
@@ -68,7 +68,7 @@
 	int err, pid = mm_idp->u.pid;
 
 	if(proc_mm)
-#warning Need to look up userspace_pid by cpu
+		/* FIXME: Need to look up userspace_pid by cpu */
 		pid = userspace_pid[0];
 
 	multi_count++;
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 5c088a5..6a0e466 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -586,7 +586,7 @@
 {
 	int err;
 
-#warning need cpu pid in switch_mm_skas
+	/* FIXME: need cpu pid in switch_mm_skas */
 	if(proc_mm){
 		err = ptrace(PTRACE_SWITCH_MM, userspace_pid[0], 0,
 			     mm_idp->u.mm_fd);
diff --git a/arch/v850/kernel/asm-offsets.c b/arch/v850/kernel/asm-offsets.c
index 24f2913..cee5c31 100644
--- a/arch/v850/kernel/asm-offsets.c
+++ b/arch/v850/kernel/asm-offsets.c
@@ -29,7 +29,7 @@
 	DEFINE (TASK_PTRACE, offsetof (struct task_struct, ptrace));
 	DEFINE (TASK_BLOCKED, offsetof (struct task_struct, blocked));
 	DEFINE (TASK_THREAD, offsetof (struct task_struct, thread));
-	DEFINE (TASK_THREAD_INFO, offsetof (struct task_struct, thread_info));
+	DEFINE (TASK_THREAD_INFO, offsetof (struct task_struct, stack));
 	DEFINE (TASK_MM, offsetof (struct task_struct, mm));
 	DEFINE (TASK_ACTIVE_MM, offsetof (struct task_struct, active_mm));
 	DEFINE (TASK_PID, offsetof (struct task_struct, pid));
diff --git a/arch/x86_64/kernel/irq.c b/arch/x86_64/kernel/irq.c
index 3bc30d2..3eaceac 100644
--- a/arch/x86_64/kernel/irq.c
+++ b/arch/x86_64/kernel/irq.c
@@ -32,7 +32,7 @@
  */
 static inline void stack_overflow_check(struct pt_regs *regs)
 {
-	u64 curbase = (u64) current->thread_info;
+	u64 curbase = (u64)task_stack_page(current);
 	static unsigned long warned = -60*HZ;
 
 	if (regs->rsp >= curbase && regs->rsp <= curbase + THREAD_SIZE &&
diff --git a/arch/x86_64/kernel/mce.c b/arch/x86_64/kernel/mce.c
index 44216964..a14375d 100644
--- a/arch/x86_64/kernel/mce.c
+++ b/arch/x86_64/kernel/mce.c
@@ -720,9 +720,11 @@
 
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		mce_create_device(cpu);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		mce_remove_device(cpu);
 		break;
 	}
diff --git a/arch/x86_64/kernel/mce_amd.c b/arch/x86_64/kernel/mce_amd.c
index d0bd5d6..03356e6 100644
--- a/arch/x86_64/kernel/mce_amd.c
+++ b/arch/x86_64/kernel/mce_amd.c
@@ -654,9 +654,11 @@
 
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		threshold_create_device(cpu);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		threshold_remove_device(cpu);
 		break;
 	default:
diff --git a/arch/x86_64/kernel/vsyscall.c b/arch/x86_64/kernel/vsyscall.c
index dc32cef..51d4c6f 100644
--- a/arch/x86_64/kernel/vsyscall.c
+++ b/arch/x86_64/kernel/vsyscall.c
@@ -327,7 +327,7 @@
 cpu_vsyscall_notifier(struct notifier_block *n, unsigned long action, void *arg)
 {
 	long cpu = (long)arg;
-	if (action == CPU_ONLINE)
+	if (action == CPU_ONLINE || action == CPU_ONLINE_FROZEN)
 		smp_call_function_single(cpu, cpu_vsyscall_init, NULL, 0, 1);
 	return NOTIFY_DONE;
 }
diff --git a/arch/xtensa/kernel/asm-offsets.c b/arch/xtensa/kernel/asm-offsets.c
index b256cfb..698079b 100644
--- a/arch/xtensa/kernel/asm-offsets.c
+++ b/arch/xtensa/kernel/asm-offsets.c
@@ -70,7 +70,7 @@
 	DEFINE(TASK_ACTIVE_MM, offsetof (struct task_struct, active_mm));
 	DEFINE(TASK_PID, offsetof (struct task_struct, pid));
 	DEFINE(TASK_THREAD, offsetof (struct task_struct, thread));
-	DEFINE(TASK_THREAD_INFO, offsetof (struct task_struct, thread_info));
+	DEFINE(TASK_THREAD_INFO, offsetof (struct task_struct, stack));
 	DEFINE(TASK_STRUCT_SIZE, sizeof (struct task_struct));
 	BLANK();
 
diff --git a/block/as-iosched.c b/block/as-iosched.c
index 640aa83..109e91b 100644
--- a/block/as-iosched.c
+++ b/block/as-iosched.c
@@ -1306,7 +1306,7 @@
 	struct as_data *ad = e->elevator_data;
 
 	del_timer_sync(&ad->antic_timer);
-	kblockd_flush();
+	kblockd_flush_work(&ad->antic_work);
 
 	BUG_ON(!list_empty(&ad->fifo_list[REQ_SYNC]));
 	BUG_ON(!list_empty(&ad->fifo_list[REQ_ASYNC]));
diff --git a/block/genhd.c b/block/genhd.c
index b566444..93a2cf6 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -213,6 +213,59 @@
 	return  kobj ? to_disk(kobj) : NULL;
 }
 
+/*
+ * print a full list of all partitions - intended for places where the root
+ * filesystem can't be mounted and thus to give the victim some idea of what
+ * went wrong
+ */
+void __init printk_all_partitions(void)
+{
+	int n;
+	struct gendisk *sgp;
+
+	mutex_lock(&block_subsys_lock);
+	/* For each block device... */
+	list_for_each_entry(sgp, &block_subsys.list, kobj.entry) {
+		char buf[BDEVNAME_SIZE];
+		/*
+		 * Don't show empty devices or things that have been surpressed
+		 */
+		if (get_capacity(sgp) == 0 ||
+		    (sgp->flags & GENHD_FL_SUPPRESS_PARTITION_INFO))
+			continue;
+
+		/*
+		 * Note, unlike /proc/partitions, I am showing the numbers in
+		 * hex - the same format as the root= option takes.
+		 */
+		printk("%02x%02x %10llu %s",
+			sgp->major, sgp->first_minor,
+			(unsigned long long)get_capacity(sgp) >> 1,
+			disk_name(sgp, 0, buf));
+		if (sgp->driverfs_dev != NULL &&
+		    sgp->driverfs_dev->driver != NULL)
+			printk(" driver: %s\n",
+				sgp->driverfs_dev->driver->name);
+		else
+			printk(" (driver?)\n");
+
+		/* now show the partitions */
+		for (n = 0; n < sgp->minors - 1; ++n) {
+			if (sgp->part[n] == NULL)
+				continue;
+			if (sgp->part[n]->nr_sects == 0)
+				continue;
+			printk("  %02x%02x %10llu %s\n",
+				sgp->major, n + 1 + sgp->first_minor,
+				(unsigned long long)sgp->part[n]->nr_sects >> 1,
+				disk_name(sgp, n + 1, buf));
+		} /* partition subloop */
+	} /* Block device loop */
+
+	mutex_unlock(&block_subsys_lock);
+	return;
+}
+
 #ifdef CONFIG_PROC_FS
 /* iterator */
 static void *part_start(struct seq_file *part, loff_t *pos)
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index d99d402..cd54672 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -1712,7 +1712,6 @@
 void blk_sync_queue(struct request_queue *q)
 {
 	del_timer_sync(&q->unplug_timer);
-	kblockd_flush();
 }
 EXPORT_SYMBOL(blk_sync_queue);
 
@@ -3508,7 +3507,7 @@
 	 * If a CPU goes away, splice its entries to the current CPU
 	 * and trigger a run of the softirq
 	 */
-	if (action == CPU_DEAD) {
+	if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) {
 		int cpu = (unsigned long) hcpu;
 
 		local_irq_disable();
@@ -3632,11 +3631,11 @@
 
 EXPORT_SYMBOL(kblockd_schedule_work);
 
-void kblockd_flush(void)
+void kblockd_flush_work(struct work_struct *work)
 {
-	flush_workqueue(kblockd_workqueue);
+	cancel_work_sync(work);
 }
-EXPORT_SYMBOL(kblockd_flush);
+EXPORT_SYMBOL(kblockd_flush_work);
 
 int __init blk_dev_init(void)
 {
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index f8c6341..52b2347 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -29,7 +29,6 @@
 	[PM_SUSPEND_ON] = ACPI_STATE_S0,
 	[PM_SUSPEND_STANDBY] = ACPI_STATE_S1,
 	[PM_SUSPEND_MEM] = ACPI_STATE_S3,
-	[PM_SUSPEND_DISK] = ACPI_STATE_S4,
 	[PM_SUSPEND_MAX] = ACPI_STATE_S5
 };
 
@@ -94,14 +93,6 @@
 		do_suspend_lowlevel();
 		break;
 
-	case PM_SUSPEND_DISK:
-		if (acpi_pm_ops.pm_disk_mode == PM_DISK_PLATFORM)
-			status = acpi_enter_sleep_state(acpi_state);
-		break;
-	case PM_SUSPEND_MAX:
-		acpi_power_off();
-		break;
-
 	default:
 		return -EINVAL;
 	}
@@ -157,12 +148,13 @@
 	suspend_state_t states[] = {
 		[1] = PM_SUSPEND_STANDBY,
 		[3] = PM_SUSPEND_MEM,
-		[4] = PM_SUSPEND_DISK,
 		[5] = PM_SUSPEND_MAX
 	};
 
 	if (acpi_state < 6 && states[acpi_state])
 		return pm_suspend(states[acpi_state]);
+	if (acpi_state == 4)
+		return hibernate();
 	return -EINVAL;
 }
 
@@ -189,6 +181,49 @@
 	.finish = acpi_pm_finish,
 };
 
+#ifdef CONFIG_SOFTWARE_SUSPEND
+static int acpi_hibernation_prepare(void)
+{
+	return acpi_sleep_prepare(ACPI_STATE_S4);
+}
+
+static int acpi_hibernation_enter(void)
+{
+	acpi_status status = AE_OK;
+	unsigned long flags = 0;
+
+	ACPI_FLUSH_CPU_CACHE();
+
+	local_irq_save(flags);
+	acpi_enable_wakeup_device(ACPI_STATE_S4);
+	/* This shouldn't return.  If it returns, we have a problem */
+	status = acpi_enter_sleep_state(ACPI_STATE_S4);
+	local_irq_restore(flags);
+
+	return ACPI_SUCCESS(status) ? 0 : -EFAULT;
+}
+
+static void acpi_hibernation_finish(void)
+{
+	acpi_leave_sleep_state(ACPI_STATE_S4);
+	acpi_disable_wakeup_device(ACPI_STATE_S4);
+
+	/* reset firmware waking vector */
+	acpi_set_firmware_waking_vector((acpi_physical_address) 0);
+
+	if (init_8259A_after_S1) {
+		printk("Broken toshiba laptop -> kicking interrupts\n");
+		init_8259A(0);
+	}
+}
+
+static struct hibernation_ops acpi_hibernation_ops = {
+	.prepare = acpi_hibernation_prepare,
+	.enter = acpi_hibernation_enter,
+	.finish = acpi_hibernation_finish,
+};
+#endif /* CONFIG_SOFTWARE_SUSPEND */
+
 /*
  * Toshiba fails to preserve interrupts over S1, reinitialization
  * of 8259 is needed after S1 resume.
@@ -227,14 +262,18 @@
 			sleep_states[i] = 1;
 			printk(" S%d", i);
 		}
-		if (i == ACPI_STATE_S4) {
-			if (sleep_states[i])
-				acpi_pm_ops.pm_disk_mode = PM_DISK_PLATFORM;
-		}
 	}
 	printk(")\n");
 
 	pm_set_ops(&acpi_pm_ops);
+
+#ifdef CONFIG_SOFTWARE_SUSPEND
+	if (sleep_states[ACPI_STATE_S4])
+		hibernation_set_ops(&acpi_hibernation_ops);
+#else
+	sleep_states[ACPI_STATE_S4] = 0;
+#endif
+
 	return 0;
 }
 
diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c
index 5a76e5b..76b45f0 100644
--- a/drivers/acpi/sleep/proc.c
+++ b/drivers/acpi/sleep/proc.c
@@ -60,7 +60,7 @@
 	state = simple_strtoul(str, NULL, 0);
 #ifdef CONFIG_SOFTWARE_SUSPEND
 	if (state == 4) {
-		error = pm_suspend(PM_SUSPEND_DISK);
+		error = hibernate();
 		goto Done;
 	}
 #endif
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index a795088..fef87dd 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1316,7 +1316,7 @@
 	spin_unlock_irqrestore(ap->lock, flags);
 
 	DPRINTK("flush #1\n");
-	flush_workqueue(ata_wq);
+	cancel_work_sync(&ap->port_task.work); /* akpm: seems unneeded */
 
 	/*
 	 * At this point, if a task is running, it's guaranteed to see
@@ -1327,7 +1327,7 @@
 		if (ata_msg_ctl(ap))
 			ata_port_printk(ap, KERN_DEBUG, "%s: flush #2\n",
 					__FUNCTION__);
-		flush_workqueue(ata_wq);
+		cancel_work_sync(&ap->port_task.work);
 	}
 
 	spin_lock_irqsave(ap->lock, flags);
@@ -6475,9 +6475,9 @@
 	/* Flush hotplug task.  The sequence is similar to
 	 * ata_port_flush_task().
 	 */
-	flush_workqueue(ata_aux_wq);
+	cancel_work_sync(&ap->hotplug_task.work); /* akpm: why? */
 	cancel_delayed_work(&ap->hotplug_task);
-	flush_workqueue(ata_aux_wq);
+	cancel_work_sync(&ap->hotplug_task.work);
 
  skip_eh:
 	/* remove the associated SCSI host */
diff --git a/drivers/base/topology.c b/drivers/base/topology.c
index 067a9e8..8d8cdfe 100644
--- a/drivers/base/topology.c
+++ b/drivers/base/topology.c
@@ -126,10 +126,13 @@
 
 	switch (action) {
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		rc = topology_add_dev(cpu);
 		break;
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		topology_remove_dev(cpu);
 		break;
 	}
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index af6d7274..18cdd8c 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -243,17 +243,13 @@
 		transfer_result = lo_do_transfer(lo, WRITE, page, offset,
 				bvec->bv_page, bv_offs, size, IV);
 		if (unlikely(transfer_result)) {
-			char *kaddr;
-
 			/*
 			 * The transfer failed, but we still write the data to
 			 * keep prepare/commit calls balanced.
 			 */
 			printk(KERN_ERR "loop: transfer error block %llu\n",
 			       (unsigned long long)index);
-			kaddr = kmap_atomic(page, KM_USER0);
-			memset(kaddr + offset, 0, size);
-			kunmap_atomic(kaddr, KM_USER0);
+			zero_user_page(page, offset, size, KM_USER0);
 		}
 		flush_dcache_page(page);
 		ret = aops->commit_write(file, page, offset,
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 090796b..069ae39 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -366,20 +366,25 @@
 	.show = pid_show,
 };
 
-static void nbd_do_it(struct nbd_device *lo)
+static int nbd_do_it(struct nbd_device *lo)
 {
 	struct request *req;
+	int ret;
 
 	BUG_ON(lo->magic != LO_MAGIC);
 
 	lo->pid = current->pid;
-	sysfs_create_file(&lo->disk->kobj, &pid_attr.attr);
+	ret = sysfs_create_file(&lo->disk->kobj, &pid_attr.attr);
+	if (ret) {
+		printk(KERN_ERR "nbd: sysfs_create_file failed!");
+		return ret;
+	}
 
 	while ((req = nbd_read_stat(lo)) != NULL)
 		nbd_end_request(req);
 
 	sysfs_remove_file(&lo->disk->kobj, &pid_attr.attr);
-	return;
+	return 0;
 }
 
 static void nbd_clear_que(struct nbd_device *lo)
@@ -569,7 +574,9 @@
 	case NBD_DO_IT:
 		if (!lo->file)
 			return -EINVAL;
-		nbd_do_it(lo);
+		error = nbd_do_it(lo);
+		if (error)
+			return error;
 		/* on return tidy up in case we have a signal */
 		/* Forcibly shutdown the socket causing all listeners
 		 * to error
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index 5f3acd8..7cda04b 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -91,3 +91,17 @@
 	  module will be called omap-rng.
 
  	  If unsure, say Y.
+
+config HW_RANDOM_PASEMI
+	tristate "PA Semi HW Random Number Generator support"
+	depends on HW_RANDOM && PPC_PASEMI
+	default HW_RANDOM
+	---help---
+	  This driver provides kernel-side support for the Random Number
+	  Generator hardware found on PA6T-1682M processor.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called pasemi-rng.
+
+	  If unsure, say Y.
+
diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile
index c41fa19..c8b7300 100644
--- a/drivers/char/hw_random/Makefile
+++ b/drivers/char/hw_random/Makefile
@@ -10,3 +10,4 @@
 obj-$(CONFIG_HW_RANDOM_VIA) += via-rng.o
 obj-$(CONFIG_HW_RANDOM_IXP4XX) += ixp4xx-rng.o
 obj-$(CONFIG_HW_RANDOM_OMAP) += omap-rng.o
+obj-$(CONFIG_HW_RANDOM_PASEMI) += pasemi-rng.o
diff --git a/drivers/char/hw_random/pasemi-rng.c b/drivers/char/hw_random/pasemi-rng.c
new file mode 100644
index 0000000..fa6040b
--- /dev/null
+++ b/drivers/char/hw_random/pasemi-rng.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2006-2007 PA Semi, Inc
+ *
+ * Maintained by: Olof Johansson <olof@lixom.net>
+ *
+ * Driver for the PWRficient onchip rng
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/hw_random.h>
+#include <asm/of_platform.h>
+#include <asm/io.h>
+
+#define SDCRNG_CTL_REG			0x00
+#define   SDCRNG_CTL_FVLD_M		0x0000f000
+#define   SDCRNG_CTL_FVLD_S		12
+#define   SDCRNG_CTL_KSZ		0x00000800
+#define   SDCRNG_CTL_RSRC_CRG		0x00000010
+#define   SDCRNG_CTL_RSRC_RRG		0x00000000
+#define   SDCRNG_CTL_CE			0x00000004
+#define   SDCRNG_CTL_RE			0x00000002
+#define   SDCRNG_CTL_DR			0x00000001
+#define   SDCRNG_CTL_SELECT_RRG_RNG	(SDCRNG_CTL_RE | SDCRNG_CTL_RSRC_RRG)
+#define   SDCRNG_CTL_SELECT_CRG_RNG	(SDCRNG_CTL_CE | SDCRNG_CTL_RSRC_CRG)
+#define SDCRNG_VAL_REG			0x20
+
+#define MODULE_NAME "pasemi_rng"
+
+static int pasemi_rng_data_present(struct hwrng *rng)
+{
+	void __iomem *rng_regs = (void __iomem *)rng->priv;
+
+	return (in_le32(rng_regs + SDCRNG_CTL_REG)
+		& SDCRNG_CTL_FVLD_M) ? 1 : 0;
+}
+
+static int pasemi_rng_data_read(struct hwrng *rng, u32 *data)
+{
+	void __iomem *rng_regs = (void __iomem *)rng->priv;
+	*data = in_le32(rng_regs + SDCRNG_VAL_REG);
+	return 4;
+}
+
+static int pasemi_rng_init(struct hwrng *rng)
+{
+	void __iomem *rng_regs = (void __iomem *)rng->priv;
+	u32 ctl;
+
+	ctl = SDCRNG_CTL_DR | SDCRNG_CTL_SELECT_RRG_RNG | SDCRNG_CTL_KSZ;
+	out_le32(rng_regs + SDCRNG_CTL_REG, ctl);
+	out_le32(rng_regs + SDCRNG_CTL_REG, ctl & ~SDCRNG_CTL_DR);
+
+	return 0;
+}
+
+static void pasemi_rng_cleanup(struct hwrng *rng)
+{
+	void __iomem *rng_regs = (void __iomem *)rng->priv;
+	u32 ctl;
+
+	ctl = SDCRNG_CTL_RE | SDCRNG_CTL_CE;
+	out_le32(rng_regs + SDCRNG_CTL_REG,
+		 in_le32(rng_regs + SDCRNG_CTL_REG) & ~ctl);
+}
+
+static struct hwrng pasemi_rng = {
+	.name		= MODULE_NAME,
+	.init		= pasemi_rng_init,
+	.cleanup	= pasemi_rng_cleanup,
+	.data_present	= pasemi_rng_data_present,
+	.data_read	= pasemi_rng_data_read,
+};
+
+static int __devinit rng_probe(struct of_device *ofdev,
+			       const struct of_device_id *match)
+{
+	void __iomem *rng_regs;
+	struct device_node *rng_np = ofdev->node;
+	struct resource res;
+	int err = 0;
+
+	err = of_address_to_resource(rng_np, 0, &res);
+	if (err)
+		return -ENODEV;
+
+	rng_regs = ioremap(res.start, 0x100);
+
+	if (!rng_regs)
+		return -ENOMEM;
+
+	pasemi_rng.priv = (unsigned long)rng_regs;
+
+	printk(KERN_INFO "Registering PA Semi RNG\n");
+
+	err = hwrng_register(&pasemi_rng);
+
+	if (err)
+		iounmap(rng_regs);
+
+	return err;
+}
+
+static int __devexit rng_remove(struct of_device *dev)
+{
+	void __iomem *rng_regs = (void __iomem *)pasemi_rng.priv;
+
+	hwrng_unregister(&pasemi_rng);
+	iounmap(rng_regs);
+
+	return 0;
+}
+
+static struct of_device_id rng_match[] = {
+	{
+		.compatible      = "1682m-rng",
+	},
+	{},
+};
+
+static struct of_platform_driver rng_driver = {
+	.name		= "pasemi-rng",
+	.match_table	= rng_match,
+	.probe		= rng_probe,
+	.remove		= rng_remove,
+};
+
+static int __init rng_init(void)
+{
+	return of_register_platform_driver(&rng_driver);
+}
+module_init(rng_init);
+
+static void __exit rng_exit(void)
+{
+	of_unregister_platform_driver(&rng_driver);
+}
+module_exit(rng_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Egor Martovetsky <egor@pasemi.com>");
+MODULE_DESCRIPTION("H/W RNG driver for PA Semi processor");
diff --git a/drivers/char/pcmcia/Kconfig b/drivers/char/pcmcia/Kconfig
index 27c1179..f25facd 100644
--- a/drivers/char/pcmcia/Kconfig
+++ b/drivers/char/pcmcia/Kconfig
@@ -21,6 +21,7 @@
 config CARDMAN_4000
 	tristate "Omnikey Cardman 4000 support"
 	depends on PCMCIA
+	select BITREVERSE
 	help
 	  Enable support for the Omnikey Cardman 4000 PCMCIA Smartcard
 	  reader.
diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c
index e91b43a..561d0e1 100644
--- a/drivers/char/pcmcia/cm4000_cs.c
+++ b/drivers/char/pcmcia/cm4000_cs.c
@@ -31,6 +31,7 @@
 #include <linux/init.h>
 #include <linux/fs.h>
 #include <linux/delay.h>
+#include <linux/bitrev.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 
@@ -194,41 +195,17 @@
 }
 #endif
 
-#define	b_0000	15
-#define	b_0001	14
-#define	b_0010	13
-#define	b_0011	12
-#define	b_0100	11
-#define	b_0101	10
-#define	b_0110	9
-#define	b_0111	8
-#define	b_1000	7
-#define	b_1001	6
-#define	b_1010	5
-#define	b_1011	4
-#define	b_1100	3
-#define	b_1101	2
-#define	b_1110	1
-#define	b_1111	0
-
-static unsigned char irtab[16] = {
-	b_0000, b_1000, b_0100, b_1100,
-	b_0010, b_1010, b_0110, b_1110,
-	b_0001, b_1001, b_0101, b_1101,
-	b_0011, b_1011, b_0111, b_1111
-};
+static inline unsigned char invert_revert(unsigned char ch)
+{
+	return bitrev8(~ch);
+}
 
 static void str_invert_revert(unsigned char *b, int len)
 {
 	int i;
 
 	for (i = 0; i < len; i++)
-		b[i] = (irtab[b[i] & 0x0f] << 4) | irtab[b[i] >> 4];
-}
-
-static unsigned char invert_revert(unsigned char ch)
-{
-	return (irtab[ch & 0x0f] << 4) | irtab[ch >> 4];
+		b[i] = invert_revert(b[i]);
 }
 
 #define	ATRLENCK(dev,pos) \
@@ -1881,8 +1858,11 @@
 	init_waitqueue_head(&dev->readq);
 
 	ret = cm4000_config(link, i);
-	if (ret)
+	if (ret) {
+		dev_table[i] = NULL;
+		kfree(dev);
 		return ret;
+	}
 
 	class_device_create(cmm_class, NULL, MKDEV(major, i), NULL,
 			    "cmm%d", i);
@@ -1907,7 +1887,7 @@
 	cm4000_release(link);
 
 	dev_table[devno] = NULL;
- 	kfree(dev);
+	kfree(dev);
 
 	class_device_destroy(cmm_class, MKDEV(major, devno));
 
@@ -1956,12 +1936,14 @@
 	if (major < 0) {
 		printk(KERN_WARNING MODULE_NAME
 			": could not get major number\n");
+		class_destroy(cmm_class);
 		return major;
 	}
 
 	rc = pcmcia_register_driver(&cm4000_driver);
 	if (rc < 0) {
 		unregister_chrdev(major, DEVICE_NAME);
+		class_destroy(cmm_class);
 		return rc;
 	}
 
diff --git a/drivers/char/pcmcia/cm4040_cs.c b/drivers/char/pcmcia/cm4040_cs.c
index f2e4ec4..af88181 100644
--- a/drivers/char/pcmcia/cm4040_cs.c
+++ b/drivers/char/pcmcia/cm4040_cs.c
@@ -636,8 +636,11 @@
 	setup_timer(&dev->poll_timer, cm4040_do_poll, 0);
 
 	ret = reader_config(link, i);
-	if (ret)
+	if (ret) {
+		dev_table[i] = NULL;
+		kfree(dev);
 		return ret;
+	}
 
 	class_device_create(cmx_class, NULL, MKDEV(major, i), NULL,
 			    "cmx%d", i);
@@ -708,12 +711,14 @@
 	if (major < 0) {
 		printk(KERN_WARNING MODULE_NAME
 			": could not get major number\n");
+		class_destroy(cmx_class);
 		return major;
 	}
 
 	rc = pcmcia_register_driver(&reader_driver);
 	if (rc < 0) {
 		unregister_chrdev(major, DEVICE_NAME);
+		class_destroy(cmx_class);
 		return rc;
 	}
 
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 7710a6a..bf5a001 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -934,13 +934,6 @@
 		return -EINVAL;
 
 	/*
-	 *	No more input please, we are switching. The new ldisc
-	 *	will update this value in the ldisc open function
-	 */
-
-	tty->receive_room = 0;
-
-	/*
 	 *	Problem: What do we do if this blocks ?
 	 */
 
@@ -951,6 +944,13 @@
 		return 0;
 	}
 
+	/*
+	 *	No more input please, we are switching. The new ldisc
+	 *	will update this value in the ldisc open function
+	 */
+
+	tty->receive_room = 0;
+
 	o_ldisc = tty->ldisc;
 	o_tty = tty->link;
 
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 893dbaf..eb37fba 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1685,9 +1685,11 @@
 	if (sys_dev) {
 		switch (action) {
 		case CPU_ONLINE:
+		case CPU_ONLINE_FROZEN:
 			cpufreq_add_dev(sys_dev);
 			break;
 		case CPU_DOWN_PREPARE:
+		case CPU_DOWN_PREPARE_FROZEN:
 			if (unlikely(lock_policy_rwsem_write(cpu)))
 				BUG();
 
@@ -1699,6 +1701,7 @@
 			__cpufreq_remove_dev(sys_dev);
 			break;
 		case CPU_DOWN_FAILED:
+		case CPU_DOWN_FAILED_FROZEN:
 			cpufreq_add_dev(sys_dev);
 			break;
 		}
diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index d1c7cac..d2f0cbd 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -313,9 +313,11 @@
 
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		cpufreq_update_policy(cpu);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		cpufreq_stats_free_table(cpu);
 		break;
 	}
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index 03b1f65..75e3911 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -309,9 +309,11 @@
 
 	switch (action) {
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		coretemp_device_add(cpu);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		coretemp_device_remove(cpu);
 		break;
 	}
diff --git a/drivers/i2c/chips/tps65010.c b/drivers/i2c/chips/tps65010.c
index 7ed92dc..3c3f2eb 100644
--- a/drivers/i2c/chips/tps65010.c
+++ b/drivers/i2c/chips/tps65010.c
@@ -354,7 +354,7 @@
 			 * also needs to get error handling and probably
 			 * an #ifdef CONFIG_SOFTWARE_SUSPEND
 			 */
-			pm_suspend(PM_SUSPEND_DISK);
+			hibernate();
 #endif
 			poll = 1;
 		}
diff --git a/drivers/infiniband/hw/ehca/ehca_irq.c b/drivers/infiniband/hw/ehca/ehca_irq.c
index f284be1..82dda2f 100644
--- a/drivers/infiniband/hw/ehca/ehca_irq.c
+++ b/drivers/infiniband/hw/ehca/ehca_irq.c
@@ -745,6 +745,7 @@
 
 	switch (action) {
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		ehca_gen_dbg("CPU: %x (CPU_PREPARE)", cpu);
 		if(!create_comp_task(pool, cpu)) {
 			ehca_gen_err("Can't create comp_task for cpu: %x", cpu);
@@ -752,24 +753,29 @@
 		}
 		break;
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 		ehca_gen_dbg("CPU: %x (CPU_CANCELED)", cpu);
 		cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu);
 		kthread_bind(cct->task, any_online_cpu(cpu_online_map));
 		destroy_comp_task(pool, cpu);
 		break;
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		ehca_gen_dbg("CPU: %x (CPU_ONLINE)", cpu);
 		cct = per_cpu_ptr(pool->cpu_comp_tasks, cpu);
 		kthread_bind(cct->task, cpu);
 		wake_up_process(cct->task);
 		break;
 	case CPU_DOWN_PREPARE:
+	case CPU_DOWN_PREPARE_FROZEN:
 		ehca_gen_dbg("CPU: %x (CPU_DOWN_PREPARE)", cpu);
 		break;
 	case CPU_DOWN_FAILED:
+	case CPU_DOWN_FAILED_FROZEN:
 		ehca_gen_dbg("CPU: %x (CPU_DOWN_FAILED)", cpu);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		ehca_gen_dbg("CPU: %x (CPU_DEAD)", cpu);
 		destroy_comp_task(pool, cpu);
 		take_over_work(pool, cpu);
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index c8b8cfa..0d89260 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -2889,7 +2889,9 @@
 
 	switch (val) {
 	case CPU_DOWN_PREPARE:
+	case CPU_DOWN_PREPARE_FROZEN:
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 		printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
 		       cpu);
 		decache_vcpus_on_cpu(cpu);
@@ -2897,6 +2899,7 @@
 					 NULL, 0, 1);
 		break;
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
 		       cpu);
 		smp_call_function_single(cpu, kvm_arch_ops->hardware_enable,
diff --git a/drivers/mca/mca-bus.c b/drivers/mca/mca-bus.c
index da862e4..67b8e94 100644
--- a/drivers/mca/mca-bus.c
+++ b/drivers/mca/mca-bus.c
@@ -47,19 +47,25 @@
 {
 	struct mca_device *mca_dev = to_mca_device (dev);
 	struct mca_driver *mca_drv = to_mca_driver (drv);
-	const short *mca_ids = mca_drv->id_table;
-	int i;
+	const unsigned short *mca_ids = mca_drv->id_table;
+	int i = 0;
 
-	if (!mca_ids)
-		return 0;
-
-	for(i = 0; mca_ids[i]; i++) {
-		if (mca_ids[i] == mca_dev->pos_id) {
-			mca_dev->index = i;
-			return 1;
+	if (mca_ids) {
+		for(i = 0; mca_ids[i]; i++) {
+			if (mca_ids[i] == mca_dev->pos_id) {
+				mca_dev->index = i;
+				return 1;
+			}
 		}
 	}
-
+	/* If the integrated id is present, treat it as though it were an
+	 * additional id in the id_table (it can't be because by definition,
+	 * integrated id's overflow a short */
+	if (mca_drv->integrated_id && mca_dev->pos_id ==
+	    mca_drv->integrated_id) {
+		mca_dev->index = i;
+		return 1;
+	}
 	return 0;
 }
 
diff --git a/drivers/mca/mca-driver.c b/drivers/mca/mca-driver.c
index 2223466..32cd39b 100644
--- a/drivers/mca/mca-driver.c
+++ b/drivers/mca/mca-driver.c
@@ -36,12 +36,25 @@
 		mca_drv->driver.bus = &mca_bus_type;
 		if ((r = driver_register(&mca_drv->driver)) < 0)
 			return r;
+		mca_drv->integrated_id = 0;
 	}
 
 	return 0;
 }
 EXPORT_SYMBOL(mca_register_driver);
 
+int mca_register_driver_integrated(struct mca_driver *mca_driver,
+				   int integrated_id)
+{
+	int r = mca_register_driver(mca_driver);
+
+	if (!r)
+		mca_driver->integrated_id = integrated_id;
+
+	return r;
+}
+EXPORT_SYMBOL(mca_register_driver_integrated);
+
 void mca_unregister_driver(struct mca_driver *mca_drv)
 {
 	if (MCA_bus)
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 4540ade..7df934d 100644
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -262,6 +262,15 @@
 	---help---
 	  Multipath support for EMC CX/AX series hardware.
 
+config DM_DELAY
+	tristate "I/O delaying target (EXPERIMENTAL)"
+	depends on BLK_DEV_DM && EXPERIMENTAL
+	---help---
+	A target that delays reads and/or writes and can send
+	them to different devices.  Useful for testing.
+
+	If unsure, say N.
+
 endmenu
 
 endif
diff --git a/drivers/md/Makefile b/drivers/md/Makefile
index 34957a6..3875408 100644
--- a/drivers/md/Makefile
+++ b/drivers/md/Makefile
@@ -31,6 +31,7 @@
 obj-$(CONFIG_BLK_DEV_MD)	+= md-mod.o
 obj-$(CONFIG_BLK_DEV_DM)	+= dm-mod.o
 obj-$(CONFIG_DM_CRYPT)		+= dm-crypt.o
+obj-$(CONFIG_DM_DELAY)		+= dm-delay.o
 obj-$(CONFIG_DM_MULTIPATH)	+= dm-multipath.o dm-round-robin.o
 obj-$(CONFIG_DM_MULTIPATH_EMC)	+= dm-emc.o
 obj-$(CONFIG_DM_SNAPSHOT)	+= dm-snapshot.o
diff --git a/drivers/md/dm-bio-list.h b/drivers/md/dm-bio-list.h
index da43496..c6be888 100644
--- a/drivers/md/dm-bio-list.h
+++ b/drivers/md/dm-bio-list.h
@@ -8,17 +8,43 @@
 #define DM_BIO_LIST_H
 
 #include <linux/bio.h>
+#include <linux/prefetch.h>
 
 struct bio_list {
 	struct bio *head;
 	struct bio *tail;
 };
 
+static inline int bio_list_empty(const struct bio_list *bl)
+{
+	return bl->head == NULL;
+}
+
+#define BIO_LIST_INIT { .head = NULL, .tail = NULL }
+
+#define BIO_LIST(bl) \
+	struct bio_list bl = BIO_LIST_INIT
+
 static inline void bio_list_init(struct bio_list *bl)
 {
 	bl->head = bl->tail = NULL;
 }
 
+#define bio_list_for_each(bio, bl) \
+	for (bio = (bl)->head; bio && ({ prefetch(bio->bi_next); 1; }); \
+	     bio = bio->bi_next)
+
+static inline unsigned bio_list_size(const struct bio_list *bl)
+{
+	unsigned sz = 0;
+	struct bio *bio;
+
+	bio_list_for_each(bio, bl)
+		sz++;
+
+	return sz;
+}
+
 static inline void bio_list_add(struct bio_list *bl, struct bio *bio)
 {
 	bio->bi_next = NULL;
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index d812123..7b0fcfc 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -33,7 +33,6 @@
 struct crypt_io {
 	struct dm_target *target;
 	struct bio *base_bio;
-	struct bio *first_clone;
 	struct work_struct work;
 	atomic_t pending;
 	int error;
@@ -107,6 +106,8 @@
 
 static struct kmem_cache *_crypt_io_pool;
 
+static void clone_init(struct crypt_io *, struct bio *);
+
 /*
  * Different IV generation algorithms:
  *
@@ -120,6 +121,9 @@
  * benbi: the 64-bit "big-endian 'narrow block'-count", starting at 1
  *        (needed for LRW-32-AES and possible other narrow block modes)
  *
+ * null: the initial vector is always zero.  Provides compatibility with
+ *       obsolete loop_fish2 devices.  Do not use for new devices.
+ *
  * plumb: unimplemented, see:
  * http://article.gmane.org/gmane.linux.kernel.device-mapper.dm-crypt/454
  */
@@ -256,6 +260,13 @@
 	return 0;
 }
 
+static int crypt_iv_null_gen(struct crypt_config *cc, u8 *iv, sector_t sector)
+{
+	memset(iv, 0, cc->iv_size);
+
+	return 0;
+}
+
 static struct crypt_iv_operations crypt_iv_plain_ops = {
 	.generator = crypt_iv_plain_gen
 };
@@ -272,6 +283,10 @@
 	.generator = crypt_iv_benbi_gen
 };
 
+static struct crypt_iv_operations crypt_iv_null_ops = {
+	.generator = crypt_iv_null_gen
+};
+
 static int
 crypt_convert_scatterlist(struct crypt_config *cc, struct scatterlist *out,
                           struct scatterlist *in, unsigned int length,
@@ -378,36 +393,21 @@
  * This should never violate the device limitations
  * May return a smaller bio when running out of pages
  */
-static struct bio *
-crypt_alloc_buffer(struct crypt_config *cc, unsigned int size,
-                   struct bio *base_bio, unsigned int *bio_vec_idx)
+static struct bio *crypt_alloc_buffer(struct crypt_io *io, unsigned int size)
 {
+	struct crypt_config *cc = io->target->private;
 	struct bio *clone;
 	unsigned int nr_iovecs = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
 	gfp_t gfp_mask = GFP_NOIO | __GFP_HIGHMEM;
 	unsigned int i;
 
-	if (base_bio) {
-		clone = bio_alloc_bioset(GFP_NOIO, base_bio->bi_max_vecs, cc->bs);
-		__bio_clone(clone, base_bio);
-	} else
-		clone = bio_alloc_bioset(GFP_NOIO, nr_iovecs, cc->bs);
-
+	clone = bio_alloc_bioset(GFP_NOIO, nr_iovecs, cc->bs);
 	if (!clone)
 		return NULL;
 
-	clone->bi_destructor = dm_crypt_bio_destructor;
+	clone_init(io, clone);
 
-	/* if the last bio was not complete, continue where that one ended */
-	clone->bi_idx = *bio_vec_idx;
-	clone->bi_vcnt = *bio_vec_idx;
-	clone->bi_size = 0;
-	clone->bi_flags &= ~(1 << BIO_SEG_VALID);
-
-	/* clone->bi_idx pages have already been allocated */
-	size -= clone->bi_idx * PAGE_SIZE;
-
-	for (i = clone->bi_idx; i < nr_iovecs; i++) {
+	for (i = 0; i < nr_iovecs; i++) {
 		struct bio_vec *bv = bio_iovec_idx(clone, i);
 
 		bv->bv_page = mempool_alloc(cc->page_pool, gfp_mask);
@@ -419,7 +419,7 @@
 		 * return a partially allocated bio, the caller will then try
 		 * to allocate additional bios while submitting this partial bio
 		 */
-		if ((i - clone->bi_idx) == (MIN_BIO_PAGES - 1))
+		if (i == (MIN_BIO_PAGES - 1))
 			gfp_mask = (gfp_mask | __GFP_NOWARN) & ~__GFP_WAIT;
 
 		bv->bv_offset = 0;
@@ -438,12 +438,6 @@
 		return NULL;
 	}
 
-	/*
-	 * Remember the last bio_vec allocated to be able
-	 * to correctly continue after the splitting.
-	 */
-	*bio_vec_idx = clone->bi_vcnt;
-
 	return clone;
 }
 
@@ -495,9 +489,6 @@
 	if (!atomic_dec_and_test(&io->pending))
 		return;
 
-	if (io->first_clone)
-		bio_put(io->first_clone);
-
 	bio_endio(io->base_bio, io->base_bio->bi_size, io->error);
 
 	mempool_free(io, cc->io_pool);
@@ -562,6 +553,7 @@
 	clone->bi_end_io  = crypt_endio;
 	clone->bi_bdev    = cc->dev->bdev;
 	clone->bi_rw      = io->base_bio->bi_rw;
+	clone->bi_destructor = dm_crypt_bio_destructor;
 }
 
 static void process_read(struct crypt_io *io)
@@ -585,7 +577,6 @@
 	}
 
 	clone_init(io, clone);
-	clone->bi_destructor = dm_crypt_bio_destructor;
 	clone->bi_idx = 0;
 	clone->bi_vcnt = bio_segments(base_bio);
 	clone->bi_size = base_bio->bi_size;
@@ -604,7 +595,6 @@
 	struct convert_context ctx;
 	unsigned remaining = base_bio->bi_size;
 	sector_t sector = base_bio->bi_sector - io->target->begin;
-	unsigned bvec_idx = 0;
 
 	atomic_inc(&io->pending);
 
@@ -615,14 +605,14 @@
 	 * so repeat the whole process until all the data can be handled.
 	 */
 	while (remaining) {
-		clone = crypt_alloc_buffer(cc, base_bio->bi_size,
-					   io->first_clone, &bvec_idx);
+		clone = crypt_alloc_buffer(io, remaining);
 		if (unlikely(!clone)) {
 			dec_pending(io, -ENOMEM);
 			return;
 		}
 
 		ctx.bio_out = clone;
+		ctx.idx_out = 0;
 
 		if (unlikely(crypt_convert(cc, &ctx) < 0)) {
 			crypt_free_buffer_pages(cc, clone, clone->bi_size);
@@ -631,31 +621,26 @@
 			return;
 		}
 
-		clone_init(io, clone);
+		/* crypt_convert should have filled the clone bio */
+		BUG_ON(ctx.idx_out < clone->bi_vcnt);
+
 		clone->bi_sector = cc->start + sector;
-
-		if (!io->first_clone) {
-			/*
-			 * hold a reference to the first clone, because it
-			 * holds the bio_vec array and that can't be freed
-			 * before all other clones are released
-			 */
-			bio_get(clone);
-			io->first_clone = clone;
-		}
-
 		remaining -= clone->bi_size;
 		sector += bio_sectors(clone);
 
-		/* prevent bio_put of first_clone */
+		/* Grab another reference to the io struct
+		 * before we kick off the request */
 		if (remaining)
 			atomic_inc(&io->pending);
 
 		generic_make_request(clone);
 
+		/* Do not reference clone after this - it
+		 * may be gone already. */
+
 		/* out of memory -> run queues */
 		if (remaining)
-			congestion_wait(bio_data_dir(clone), HZ/100);
+			congestion_wait(WRITE, HZ/100);
 	}
 }
 
@@ -832,6 +817,8 @@
 		cc->iv_gen_ops = &crypt_iv_essiv_ops;
 	else if (strcmp(ivmode, "benbi") == 0)
 		cc->iv_gen_ops = &crypt_iv_benbi_ops;
+	else if (strcmp(ivmode, "null") == 0)
+		cc->iv_gen_ops = &crypt_iv_null_ops;
 	else {
 		ti->error = "Invalid IV mode";
 		goto bad2;
@@ -954,10 +941,12 @@
 	struct crypt_config *cc = ti->private;
 	struct crypt_io *io;
 
+	if (bio_barrier(bio))
+		return -EOPNOTSUPP;
+
 	io = mempool_alloc(cc->io_pool, GFP_NOIO);
 	io->target = ti;
 	io->base_bio = bio;
-	io->first_clone = NULL;
 	io->error = io->post_process = 0;
 	atomic_set(&io->pending, 0);
 	kcryptd_queue_io(io);
@@ -1057,7 +1046,7 @@
 
 static struct target_type crypt_target = {
 	.name   = "crypt",
-	.version= {1, 3, 0},
+	.version= {1, 5, 0},
 	.module = THIS_MODULE,
 	.ctr    = crypt_ctr,
 	.dtr    = crypt_dtr,
diff --git a/drivers/md/dm-delay.c b/drivers/md/dm-delay.c
new file mode 100644
index 0000000..52c7cf9
--- /dev/null
+++ b/drivers/md/dm-delay.c
@@ -0,0 +1,383 @@
+/*
+ * Copyright (C) 2005-2007 Red Hat GmbH
+ *
+ * A target that delays reads and/or writes and can send
+ * them to different devices.
+ *
+ * This file is released under the GPL.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/bio.h>
+#include <linux/slab.h>
+
+#include "dm.h"
+#include "dm-bio-list.h"
+
+#define DM_MSG_PREFIX "delay"
+
+struct delay_c {
+	struct timer_list delay_timer;
+	struct semaphore timer_lock;
+	struct work_struct flush_expired_bios;
+	struct list_head delayed_bios;
+	atomic_t may_delay;
+	mempool_t *delayed_pool;
+
+	struct dm_dev *dev_read;
+	sector_t start_read;
+	unsigned read_delay;
+	unsigned reads;
+
+	struct dm_dev *dev_write;
+	sector_t start_write;
+	unsigned write_delay;
+	unsigned writes;
+};
+
+struct delay_info {
+	struct delay_c *context;
+	struct list_head list;
+	struct bio *bio;
+	unsigned long expires;
+};
+
+static DEFINE_MUTEX(delayed_bios_lock);
+
+static struct workqueue_struct *kdelayd_wq;
+static struct kmem_cache *delayed_cache;
+
+static void handle_delayed_timer(unsigned long data)
+{
+	struct delay_c *dc = (struct delay_c *)data;
+
+	queue_work(kdelayd_wq, &dc->flush_expired_bios);
+}
+
+static void queue_timeout(struct delay_c *dc, unsigned long expires)
+{
+	down(&dc->timer_lock);
+
+	if (!timer_pending(&dc->delay_timer) || expires < dc->delay_timer.expires)
+		mod_timer(&dc->delay_timer, expires);
+
+	up(&dc->timer_lock);
+}
+
+static void flush_bios(struct bio *bio)
+{
+	struct bio *n;
+
+	while (bio) {
+		n = bio->bi_next;
+		bio->bi_next = NULL;
+		generic_make_request(bio);
+		bio = n;
+	}
+}
+
+static struct bio *flush_delayed_bios(struct delay_c *dc, int flush_all)
+{
+	struct delay_info *delayed, *next;
+	unsigned long next_expires = 0;
+	int start_timer = 0;
+	BIO_LIST(flush_bios);
+
+	mutex_lock(&delayed_bios_lock);
+	list_for_each_entry_safe(delayed, next, &dc->delayed_bios, list) {
+		if (flush_all || time_after_eq(jiffies, delayed->expires)) {
+			list_del(&delayed->list);
+			bio_list_add(&flush_bios, delayed->bio);
+			if ((bio_data_dir(delayed->bio) == WRITE))
+				delayed->context->writes--;
+			else
+				delayed->context->reads--;
+			mempool_free(delayed, dc->delayed_pool);
+			continue;
+		}
+
+		if (!start_timer) {
+			start_timer = 1;
+			next_expires = delayed->expires;
+		} else
+			next_expires = min(next_expires, delayed->expires);
+	}
+
+	mutex_unlock(&delayed_bios_lock);
+
+	if (start_timer)
+		queue_timeout(dc, next_expires);
+
+	return bio_list_get(&flush_bios);
+}
+
+static void flush_expired_bios(struct work_struct *work)
+{
+	struct delay_c *dc;
+
+	dc = container_of(work, struct delay_c, flush_expired_bios);
+	flush_bios(flush_delayed_bios(dc, 0));
+}
+
+/*
+ * Mapping parameters:
+ *    <device> <offset> <delay> [<write_device> <write_offset> <write_delay>]
+ *
+ * With separate write parameters, the first set is only used for reads.
+ * Delays are specified in milliseconds.
+ */
+static int delay_ctr(struct dm_target *ti, unsigned int argc, char **argv)
+{
+	struct delay_c *dc;
+	unsigned long long tmpll;
+
+	if (argc != 3 && argc != 6) {
+		ti->error = "requires exactly 3 or 6 arguments";
+		return -EINVAL;
+	}
+
+	dc = kmalloc(sizeof(*dc), GFP_KERNEL);
+	if (!dc) {
+		ti->error = "Cannot allocate context";
+		return -ENOMEM;
+	}
+
+	dc->reads = dc->writes = 0;
+
+	if (sscanf(argv[1], "%llu", &tmpll) != 1) {
+		ti->error = "Invalid device sector";
+		goto bad;
+	}
+	dc->start_read = tmpll;
+
+	if (sscanf(argv[2], "%u", &dc->read_delay) != 1) {
+		ti->error = "Invalid delay";
+		goto bad;
+	}
+
+	if (dm_get_device(ti, argv[0], dc->start_read, ti->len,
+			  dm_table_get_mode(ti->table), &dc->dev_read)) {
+		ti->error = "Device lookup failed";
+		goto bad;
+	}
+
+	if (argc == 3) {
+		dc->dev_write = NULL;
+		goto out;
+	}
+
+	if (sscanf(argv[4], "%llu", &tmpll) != 1) {
+		ti->error = "Invalid write device sector";
+		goto bad;
+	}
+	dc->start_write = tmpll;
+
+	if (sscanf(argv[5], "%u", &dc->write_delay) != 1) {
+		ti->error = "Invalid write delay";
+		goto bad;
+	}
+
+	if (dm_get_device(ti, argv[3], dc->start_write, ti->len,
+			  dm_table_get_mode(ti->table), &dc->dev_write)) {
+		ti->error = "Write device lookup failed";
+		dm_put_device(ti, dc->dev_read);
+		goto bad;
+	}
+
+out:
+	dc->delayed_pool = mempool_create_slab_pool(128, delayed_cache);
+	if (!dc->delayed_pool) {
+		DMERR("Couldn't create delayed bio pool.");
+		goto bad;
+	}
+
+	init_timer(&dc->delay_timer);
+	dc->delay_timer.function = handle_delayed_timer;
+	dc->delay_timer.data = (unsigned long)dc;
+
+	INIT_WORK(&dc->flush_expired_bios, flush_expired_bios);
+	INIT_LIST_HEAD(&dc->delayed_bios);
+	init_MUTEX(&dc->timer_lock);
+	atomic_set(&dc->may_delay, 1);
+
+	ti->private = dc;
+	return 0;
+
+bad:
+	kfree(dc);
+	return -EINVAL;
+}
+
+static void delay_dtr(struct dm_target *ti)
+{
+	struct delay_c *dc = ti->private;
+
+	flush_workqueue(kdelayd_wq);
+
+	dm_put_device(ti, dc->dev_read);
+
+	if (dc->dev_write)
+		dm_put_device(ti, dc->dev_write);
+
+	mempool_destroy(dc->delayed_pool);
+	kfree(dc);
+}
+
+static int delay_bio(struct delay_c *dc, int delay, struct bio *bio)
+{
+	struct delay_info *delayed;
+	unsigned long expires = 0;
+
+	if (!delay || !atomic_read(&dc->may_delay))
+		return 1;
+
+	delayed = mempool_alloc(dc->delayed_pool, GFP_NOIO);
+
+	delayed->context = dc;
+	delayed->bio = bio;
+	delayed->expires = expires = jiffies + (delay * HZ / 1000);
+
+	mutex_lock(&delayed_bios_lock);
+
+	if (bio_data_dir(bio) == WRITE)
+		dc->writes++;
+	else
+		dc->reads++;
+
+	list_add_tail(&delayed->list, &dc->delayed_bios);
+
+	mutex_unlock(&delayed_bios_lock);
+
+	queue_timeout(dc, expires);
+
+	return 0;
+}
+
+static void delay_presuspend(struct dm_target *ti)
+{
+	struct delay_c *dc = ti->private;
+
+	atomic_set(&dc->may_delay, 0);
+	del_timer_sync(&dc->delay_timer);
+	flush_bios(flush_delayed_bios(dc, 1));
+}
+
+static void delay_resume(struct dm_target *ti)
+{
+	struct delay_c *dc = ti->private;
+
+	atomic_set(&dc->may_delay, 1);
+}
+
+static int delay_map(struct dm_target *ti, struct bio *bio,
+		     union map_info *map_context)
+{
+	struct delay_c *dc = ti->private;
+
+	if ((bio_data_dir(bio) == WRITE) && (dc->dev_write)) {
+		bio->bi_bdev = dc->dev_write->bdev;
+		bio->bi_sector = dc->start_write +
+				 (bio->bi_sector - ti->begin);
+
+		return delay_bio(dc, dc->write_delay, bio);
+	}
+
+	bio->bi_bdev = dc->dev_read->bdev;
+	bio->bi_sector = dc->start_read +
+			 (bio->bi_sector - ti->begin);
+
+	return delay_bio(dc, dc->read_delay, bio);
+}
+
+static int delay_status(struct dm_target *ti, status_type_t type,
+			char *result, unsigned maxlen)
+{
+	struct delay_c *dc = ti->private;
+	int sz = 0;
+
+	switch (type) {
+	case STATUSTYPE_INFO:
+		DMEMIT("%u %u", dc->reads, dc->writes);
+		break;
+
+	case STATUSTYPE_TABLE:
+		DMEMIT("%s %llu %u", dc->dev_read->name,
+		       (unsigned long long) dc->start_read,
+		       dc->read_delay);
+		if (dc->dev_write)
+			DMEMIT("%s %llu %u", dc->dev_write->name,
+			       (unsigned long long) dc->start_write,
+			       dc->write_delay);
+		break;
+	}
+
+	return 0;
+}
+
+static struct target_type delay_target = {
+	.name	     = "delay",
+	.version     = {1, 0, 2},
+	.module      = THIS_MODULE,
+	.ctr	     = delay_ctr,
+	.dtr	     = delay_dtr,
+	.map	     = delay_map,
+	.presuspend  = delay_presuspend,
+	.resume	     = delay_resume,
+	.status	     = delay_status,
+};
+
+static int __init dm_delay_init(void)
+{
+	int r = -ENOMEM;
+
+	kdelayd_wq = create_workqueue("kdelayd");
+	if (!kdelayd_wq) {
+		DMERR("Couldn't start kdelayd");
+		goto bad_queue;
+	}
+
+	delayed_cache = kmem_cache_create("dm-delay",
+					  sizeof(struct delay_info),
+					  __alignof__(struct delay_info),
+					  0, NULL, NULL);
+	if (!delayed_cache) {
+		DMERR("Couldn't create delayed bio cache.");
+		goto bad_memcache;
+	}
+
+	r = dm_register_target(&delay_target);
+	if (r < 0) {
+		DMERR("register failed %d", r);
+		goto bad_register;
+	}
+
+	return 0;
+
+bad_register:
+	kmem_cache_destroy(delayed_cache);
+bad_memcache:
+	destroy_workqueue(kdelayd_wq);
+bad_queue:
+	return r;
+}
+
+static void __exit dm_delay_exit(void)
+{
+	int r = dm_unregister_target(&delay_target);
+
+	if (r < 0)
+		DMERR("unregister failed %d", r);
+
+	kmem_cache_destroy(delayed_cache);
+	destroy_workqueue(kdelayd_wq);
+}
+
+/* Module hooks */
+module_init(dm_delay_init);
+module_exit(dm_delay_exit);
+
+MODULE_DESCRIPTION(DM_NAME " delay target");
+MODULE_AUTHOR("Heinz Mauelshagen <mauelshagen@redhat.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/md/dm-exception-store.c b/drivers/md/dm-exception-store.c
index 99cdffa..07e0a0c 100644
--- a/drivers/md/dm-exception-store.c
+++ b/drivers/md/dm-exception-store.c
@@ -1,7 +1,8 @@
 /*
- * dm-snapshot.c
+ * dm-exception-store.c
  *
  * Copyright (C) 2001-2002 Sistina Software (UK) Limited.
+ * Copyright (C) 2006 Red Hat GmbH
  *
  * This file is released under the GPL.
  */
@@ -123,6 +124,7 @@
 	atomic_t pending_count;
 	uint32_t callback_count;
 	struct commit_callback *callbacks;
+	struct dm_io_client *io_client;
 };
 
 static inline unsigned int sectors_to_pages(unsigned int sectors)
@@ -159,14 +161,20 @@
  */
 static int chunk_io(struct pstore *ps, uint32_t chunk, int rw)
 {
-	struct io_region where;
-	unsigned long bits;
+	struct io_region where = {
+		.bdev = ps->snap->cow->bdev,
+		.sector = ps->snap->chunk_size * chunk,
+		.count = ps->snap->chunk_size,
+	};
+	struct dm_io_request io_req = {
+		.bi_rw = rw,
+		.mem.type = DM_IO_VMA,
+		.mem.ptr.vma = ps->area,
+		.client = ps->io_client,
+		.notify.fn = NULL,
+	};
 
-	where.bdev = ps->snap->cow->bdev;
-	where.sector = ps->snap->chunk_size * chunk;
-	where.count = ps->snap->chunk_size;
-
-	return dm_io_sync_vm(1, &where, rw, ps->area, &bits);
+	return dm_io(&io_req, 1, &where, NULL);
 }
 
 /*
@@ -213,17 +221,18 @@
 		chunk_size_supplied = 0;
 	}
 
-	r = dm_io_get(sectors_to_pages(ps->snap->chunk_size));
-	if (r)
-		return r;
+	ps->io_client = dm_io_client_create(sectors_to_pages(ps->snap->
+							     chunk_size));
+	if (IS_ERR(ps->io_client))
+		return PTR_ERR(ps->io_client);
 
 	r = alloc_area(ps);
 	if (r)
-		goto bad1;
+		return r;
 
 	r = chunk_io(ps, 0, READ);
 	if (r)
-		goto bad2;
+		goto bad;
 
 	dh = (struct disk_header *) ps->area;
 
@@ -235,7 +244,7 @@
 	if (le32_to_cpu(dh->magic) != SNAP_MAGIC) {
 		DMWARN("Invalid or corrupt snapshot");
 		r = -ENXIO;
-		goto bad2;
+		goto bad;
 	}
 
 	*new_snapshot = 0;
@@ -252,27 +261,22 @@
 	       (unsigned long long)ps->snap->chunk_size);
 
 	/* We had a bogus chunk_size. Fix stuff up. */
-	dm_io_put(sectors_to_pages(ps->snap->chunk_size));
 	free_area(ps);
 
 	ps->snap->chunk_size = chunk_size;
 	ps->snap->chunk_mask = chunk_size - 1;
 	ps->snap->chunk_shift = ffs(chunk_size) - 1;
 
-	r = dm_io_get(sectors_to_pages(chunk_size));
+	r = dm_io_client_resize(sectors_to_pages(ps->snap->chunk_size),
+				ps->io_client);
 	if (r)
 		return r;
 
 	r = alloc_area(ps);
-	if (r)
-		goto bad1;
+	return r;
 
-	return 0;
-
-bad2:
+bad:
 	free_area(ps);
-bad1:
-	dm_io_put(sectors_to_pages(ps->snap->chunk_size));
 	return r;
 }
 
@@ -405,7 +409,7 @@
 {
 	struct pstore *ps = get_info(store);
 
-	dm_io_put(sectors_to_pages(ps->snap->chunk_size));
+	dm_io_client_destroy(ps->io_client);
 	vfree(ps->callbacks);
 	free_area(ps);
 	kfree(ps);
diff --git a/drivers/md/dm-hw-handler.h b/drivers/md/dm-hw-handler.h
index 32eff28..e0832e6 100644
--- a/drivers/md/dm-hw-handler.h
+++ b/drivers/md/dm-hw-handler.h
@@ -16,6 +16,7 @@
 struct hw_handler_type;
 struct hw_handler {
 	struct hw_handler_type *type;
+	struct mapped_device *md;
 	void *context;
 };
 
diff --git a/drivers/md/dm-io.c b/drivers/md/dm-io.c
index 8bdc8a8..352c6fb 100644
--- a/drivers/md/dm-io.c
+++ b/drivers/md/dm-io.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2003 Sistina Software
+ * Copyright (C) 2006 Red Hat GmbH
  *
  * This file is released under the GPL.
  */
@@ -12,13 +13,17 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 
-static struct bio_set *_bios;
+struct dm_io_client {
+	mempool_t *pool;
+	struct bio_set *bios;
+};
 
 /* FIXME: can we shrink this ? */
 struct io {
 	unsigned long error;
 	atomic_t count;
 	struct task_struct *sleeper;
+	struct dm_io_client *client;
 	io_notify_fn callback;
 	void *context;
 };
@@ -26,63 +31,58 @@
 /*
  * io contexts are only dynamically allocated for asynchronous
  * io.  Since async io is likely to be the majority of io we'll
- * have the same number of io contexts as buffer heads ! (FIXME:
- * must reduce this).
+ * have the same number of io contexts as bios! (FIXME: must reduce this).
  */
-static unsigned _num_ios;
-static mempool_t *_io_pool;
 
 static unsigned int pages_to_ios(unsigned int pages)
 {
 	return 4 * pages;	/* too many ? */
 }
 
-static int resize_pool(unsigned int new_ios)
+/*
+ * Create a client with mempool and bioset.
+ */
+struct dm_io_client *dm_io_client_create(unsigned num_pages)
 {
-	int r = 0;
+	unsigned ios = pages_to_ios(num_pages);
+	struct dm_io_client *client;
 
-	if (_io_pool) {
-		if (new_ios == 0) {
-			/* free off the pool */
-			mempool_destroy(_io_pool);
-			_io_pool = NULL;
-			bioset_free(_bios);
+	client = kmalloc(sizeof(*client), GFP_KERNEL);
+	if (!client)
+		return ERR_PTR(-ENOMEM);
 
-		} else {
-			/* resize the pool */
-			r = mempool_resize(_io_pool, new_ios, GFP_KERNEL);
-		}
+	client->pool = mempool_create_kmalloc_pool(ios, sizeof(struct io));
+	if (!client->pool)
+		goto bad;
 
-	} else {
-		/* create new pool */
-		_io_pool = mempool_create_kmalloc_pool(new_ios,
-						       sizeof(struct io));
-		if (!_io_pool)
-			return -ENOMEM;
+	client->bios = bioset_create(16, 16);
+	if (!client->bios)
+		goto bad;
 
-		_bios = bioset_create(16, 16);
-		if (!_bios) {
-			mempool_destroy(_io_pool);
-			_io_pool = NULL;
-			return -ENOMEM;
-		}
-	}
+	return client;
 
-	if (!r)
-		_num_ios = new_ios;
-
-	return r;
+   bad:
+	if (client->pool)
+		mempool_destroy(client->pool);
+	kfree(client);
+	return ERR_PTR(-ENOMEM);
 }
+EXPORT_SYMBOL(dm_io_client_create);
 
-int dm_io_get(unsigned int num_pages)
+int dm_io_client_resize(unsigned num_pages, struct dm_io_client *client)
 {
-	return resize_pool(_num_ios + pages_to_ios(num_pages));
+	return mempool_resize(client->pool, pages_to_ios(num_pages),
+			      GFP_KERNEL);
 }
+EXPORT_SYMBOL(dm_io_client_resize);
 
-void dm_io_put(unsigned int num_pages)
+void dm_io_client_destroy(struct dm_io_client *client)
 {
-	resize_pool(_num_ios - pages_to_ios(num_pages));
+	mempool_destroy(client->pool);
+	bioset_free(client->bios);
+	kfree(client);
 }
+EXPORT_SYMBOL(dm_io_client_destroy);
 
 /*-----------------------------------------------------------------
  * We need to keep track of which region a bio is doing io for.
@@ -118,7 +118,7 @@
 			io_notify_fn fn = io->callback;
 			void *context = io->context;
 
-			mempool_free(io, _io_pool);
+			mempool_free(io, io->client->pool);
 			fn(r, context);
 		}
 	}
@@ -126,7 +126,8 @@
 
 static int endio(struct bio *bio, unsigned int done, int error)
 {
-	struct io *io = (struct io *) bio->bi_private;
+	struct io *io;
+	unsigned region;
 
 	/* keep going until we've finished */
 	if (bio->bi_size)
@@ -135,10 +136,17 @@
 	if (error && bio_data_dir(bio) == READ)
 		zero_fill_bio(bio);
 
-	dec_count(io, bio_get_region(bio), error);
+	/*
+	 * The bio destructor in bio_put() may use the io object.
+	 */
+	io = bio->bi_private;
+	region = bio_get_region(bio);
+
 	bio->bi_max_vecs++;
 	bio_put(bio);
 
+	dec_count(io, region, error);
+
 	return 0;
 }
 
@@ -209,6 +217,9 @@
 	dp->context_ptr = bvec;
 }
 
+/*
+ * Functions for getting the pages from a VMA.
+ */
 static void vm_get_page(struct dpages *dp,
 		 struct page **p, unsigned long *len, unsigned *offset)
 {
@@ -233,7 +244,34 @@
 
 static void dm_bio_destructor(struct bio *bio)
 {
-	bio_free(bio, _bios);
+	struct io *io = bio->bi_private;
+
+	bio_free(bio, io->client->bios);
+}
+
+/*
+ * Functions for getting the pages from kernel memory.
+ */
+static void km_get_page(struct dpages *dp, struct page **p, unsigned long *len,
+			unsigned *offset)
+{
+	*p = virt_to_page(dp->context_ptr);
+	*offset = dp->context_u;
+	*len = PAGE_SIZE - dp->context_u;
+}
+
+static void km_next_page(struct dpages *dp)
+{
+	dp->context_ptr += PAGE_SIZE - dp->context_u;
+	dp->context_u = 0;
+}
+
+static void km_dp_init(struct dpages *dp, void *data)
+{
+	dp->get_page = km_get_page;
+	dp->next_page = km_next_page;
+	dp->context_u = ((unsigned long) data) & (PAGE_SIZE - 1);
+	dp->context_ptr = data;
 }
 
 /*-----------------------------------------------------------------
@@ -256,7 +294,7 @@
 		 * to hide it from bio_add_page().
 		 */
 		num_bvecs = (remaining / (PAGE_SIZE >> SECTOR_SHIFT)) + 2;
-		bio = bio_alloc_bioset(GFP_NOIO, num_bvecs, _bios);
+		bio = bio_alloc_bioset(GFP_NOIO, num_bvecs, io->client->bios);
 		bio->bi_sector = where->sector + (where->count - remaining);
 		bio->bi_bdev = where->bdev;
 		bio->bi_end_io = endio;
@@ -311,8 +349,9 @@
 	dec_count(io, 0, 0);
 }
 
-static int sync_io(unsigned int num_regions, struct io_region *where,
-	    int rw, struct dpages *dp, unsigned long *error_bits)
+static int sync_io(struct dm_io_client *client, unsigned int num_regions,
+		   struct io_region *where, int rw, struct dpages *dp,
+		   unsigned long *error_bits)
 {
 	struct io io;
 
@@ -324,6 +363,7 @@
 	io.error = 0;
 	atomic_set(&io.count, 1); /* see dispatch_io() */
 	io.sleeper = current;
+	io.client = client;
 
 	dispatch_io(rw, num_regions, where, dp, &io, 1);
 
@@ -340,12 +380,15 @@
 	if (atomic_read(&io.count))
 		return -EINTR;
 
-	*error_bits = io.error;
+	if (error_bits)
+		*error_bits = io.error;
+
 	return io.error ? -EIO : 0;
 }
 
-static int async_io(unsigned int num_regions, struct io_region *where, int rw,
-	     struct dpages *dp, io_notify_fn fn, void *context)
+static int async_io(struct dm_io_client *client, unsigned int num_regions,
+		    struct io_region *where, int rw, struct dpages *dp,
+		    io_notify_fn fn, void *context)
 {
 	struct io *io;
 
@@ -355,10 +398,11 @@
 		return -EIO;
 	}
 
-	io = mempool_alloc(_io_pool, GFP_NOIO);
+	io = mempool_alloc(client->pool, GFP_NOIO);
 	io->error = 0;
 	atomic_set(&io->count, 1); /* see dispatch_io() */
 	io->sleeper = NULL;
+	io->client = client;
 	io->callback = fn;
 	io->context = context;
 
@@ -366,61 +410,51 @@
 	return 0;
 }
 
-int dm_io_sync(unsigned int num_regions, struct io_region *where, int rw,
-	       struct page_list *pl, unsigned int offset,
-	       unsigned long *error_bits)
+static int dp_init(struct dm_io_request *io_req, struct dpages *dp)
 {
-	struct dpages dp;
-	list_dp_init(&dp, pl, offset);
-	return sync_io(num_regions, where, rw, &dp, error_bits);
+	/* Set up dpages based on memory type */
+	switch (io_req->mem.type) {
+	case DM_IO_PAGE_LIST:
+		list_dp_init(dp, io_req->mem.ptr.pl, io_req->mem.offset);
+		break;
+
+	case DM_IO_BVEC:
+		bvec_dp_init(dp, io_req->mem.ptr.bvec);
+		break;
+
+	case DM_IO_VMA:
+		vm_dp_init(dp, io_req->mem.ptr.vma);
+		break;
+
+	case DM_IO_KMEM:
+		km_dp_init(dp, io_req->mem.ptr.addr);
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
 }
 
-int dm_io_sync_bvec(unsigned int num_regions, struct io_region *where, int rw,
-		    struct bio_vec *bvec, unsigned long *error_bits)
+/*
+ * New collapsed (a)synchronous interface
+ */
+int dm_io(struct dm_io_request *io_req, unsigned num_regions,
+	  struct io_region *where, unsigned long *sync_error_bits)
 {
+	int r;
 	struct dpages dp;
-	bvec_dp_init(&dp, bvec);
-	return sync_io(num_regions, where, rw, &dp, error_bits);
-}
 
-int dm_io_sync_vm(unsigned int num_regions, struct io_region *where, int rw,
-		  void *data, unsigned long *error_bits)
-{
-	struct dpages dp;
-	vm_dp_init(&dp, data);
-	return sync_io(num_regions, where, rw, &dp, error_bits);
-}
+	r = dp_init(io_req, &dp);
+	if (r)
+		return r;
 
-int dm_io_async(unsigned int num_regions, struct io_region *where, int rw,
-		struct page_list *pl, unsigned int offset,
-		io_notify_fn fn, void *context)
-{
-	struct dpages dp;
-	list_dp_init(&dp, pl, offset);
-	return async_io(num_regions, where, rw, &dp, fn, context);
-}
+	if (!io_req->notify.fn)
+		return sync_io(io_req->client, num_regions, where,
+			       io_req->bi_rw, &dp, sync_error_bits);
 
-int dm_io_async_bvec(unsigned int num_regions, struct io_region *where, int rw,
-		     struct bio_vec *bvec, io_notify_fn fn, void *context)
-{
-	struct dpages dp;
-	bvec_dp_init(&dp, bvec);
-	return async_io(num_regions, where, rw, &dp, fn, context);
+	return async_io(io_req->client, num_regions, where, io_req->bi_rw,
+			&dp, io_req->notify.fn, io_req->notify.context);
 }
-
-int dm_io_async_vm(unsigned int num_regions, struct io_region *where, int rw,
-		   void *data, io_notify_fn fn, void *context)
-{
-	struct dpages dp;
-	vm_dp_init(&dp, data);
-	return async_io(num_regions, where, rw, &dp, fn, context);
-}
-
-EXPORT_SYMBOL(dm_io_get);
-EXPORT_SYMBOL(dm_io_put);
-EXPORT_SYMBOL(dm_io_sync);
-EXPORT_SYMBOL(dm_io_async);
-EXPORT_SYMBOL(dm_io_sync_bvec);
-EXPORT_SYMBOL(dm_io_async_bvec);
-EXPORT_SYMBOL(dm_io_sync_vm);
-EXPORT_SYMBOL(dm_io_async_vm);
+EXPORT_SYMBOL(dm_io);
diff --git a/drivers/md/dm-io.h b/drivers/md/dm-io.h
index f9035bf..f647e2c 100644
--- a/drivers/md/dm-io.h
+++ b/drivers/md/dm-io.h
@@ -12,7 +12,7 @@
 struct io_region {
 	struct block_device *bdev;
 	sector_t sector;
-	sector_t count;
+	sector_t count;		/* If this is zero the region is ignored. */
 };
 
 struct page_list {
@@ -20,55 +20,60 @@
 	struct page *page;
 };
 
-
-/*
- * 'error' is a bitset, with each bit indicating whether an error
- * occurred doing io to the corresponding region.
- */
 typedef void (*io_notify_fn)(unsigned long error, void *context);
 
+enum dm_io_mem_type {
+	DM_IO_PAGE_LIST,/* Page list */
+	DM_IO_BVEC,	/* Bio vector */
+	DM_IO_VMA,	/* Virtual memory area */
+	DM_IO_KMEM,	/* Kernel memory */
+};
+
+struct dm_io_memory {
+	enum dm_io_mem_type type;
+
+	union {
+		struct page_list *pl;
+		struct bio_vec *bvec;
+		void *vma;
+		void *addr;
+	} ptr;
+
+	unsigned offset;
+};
+
+struct dm_io_notify {
+	io_notify_fn fn;	/* Callback for asynchronous requests */
+	void *context;		/* Passed to callback */
+};
 
 /*
- * Before anyone uses the IO interface they should call
- * dm_io_get(), specifying roughly how many pages they are
- * expecting to perform io on concurrently.
- *
- * This function may block.
+ * IO request structure
  */
-int dm_io_get(unsigned int num_pages);
-void dm_io_put(unsigned int num_pages);
+struct dm_io_client;
+struct dm_io_request {
+	int bi_rw;			/* READ|WRITE - not READA */
+	struct dm_io_memory mem;	/* Memory to use for io */
+	struct dm_io_notify notify;	/* Synchronous if notify.fn is NULL */
+	struct dm_io_client *client;	/* Client memory handler */
+};
 
 /*
- * Synchronous IO.
+ * For async io calls, users can alternatively use the dm_io() function below
+ * and dm_io_client_create() to create private mempools for the client.
  *
- * Please ensure that the rw flag in the next two functions is
- * either READ or WRITE, ie. we don't take READA.  Any
- * regions with a zero count field will be ignored.
+ * Create/destroy may block.
  */
-int dm_io_sync(unsigned int num_regions, struct io_region *where, int rw,
-	       struct page_list *pl, unsigned int offset,
-	       unsigned long *error_bits);
-
-int dm_io_sync_bvec(unsigned int num_regions, struct io_region *where, int rw,
-		    struct bio_vec *bvec, unsigned long *error_bits);
-
-int dm_io_sync_vm(unsigned int num_regions, struct io_region *where, int rw,
-		  void *data, unsigned long *error_bits);
+struct dm_io_client *dm_io_client_create(unsigned num_pages);
+int dm_io_client_resize(unsigned num_pages, struct dm_io_client *client);
+void dm_io_client_destroy(struct dm_io_client *client);
 
 /*
- * Aynchronous IO.
- *
- * The 'where' array may be safely allocated on the stack since
- * the function takes a copy.
+ * IO interface using private per-client pools.
+ * Each bit in the optional 'sync_error_bits' bitset indicates whether an
+ * error occurred doing io to the corresponding region.
  */
-int dm_io_async(unsigned int num_regions, struct io_region *where, int rw,
-		struct page_list *pl, unsigned int offset,
-		io_notify_fn fn, void *context);
-
-int dm_io_async_bvec(unsigned int num_regions, struct io_region *where, int rw,
-		     struct bio_vec *bvec, io_notify_fn fn, void *context);
-
-int dm_io_async_vm(unsigned int num_regions, struct io_region *where, int rw,
-		   void *data, io_notify_fn fn, void *context);
+int dm_io(struct dm_io_request *io_req, unsigned num_regions,
+	  struct io_region *region, unsigned long *sync_error_bits);
 
 #endif
diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c
index 6a92613..a66428d8 100644
--- a/drivers/md/dm-log.c
+++ b/drivers/md/dm-log.c
@@ -149,9 +149,12 @@
 		FORCESYNC,	/* Force a sync to happen */
 	} sync;
 
+	struct dm_io_request io_req;
+
 	/*
 	 * Disk log fields
 	 */
+	int log_dev_failed;
 	struct dm_dev *log_dev;
 	struct log_header header;
 
@@ -199,13 +202,20 @@
 	core->nr_regions = le64_to_cpu(disk->nr_regions);
 }
 
+static int rw_header(struct log_c *lc, int rw)
+{
+	lc->io_req.bi_rw = rw;
+	lc->io_req.mem.ptr.vma = lc->disk_header;
+	lc->io_req.notify.fn = NULL;
+
+	return dm_io(&lc->io_req, 1, &lc->header_location, NULL);
+}
+
 static int read_header(struct log_c *log)
 {
 	int r;
-	unsigned long ebits;
 
-	r = dm_io_sync_vm(1, &log->header_location, READ,
-			  log->disk_header, &ebits);
+	r = rw_header(log, READ);
 	if (r)
 		return r;
 
@@ -233,11 +243,8 @@
 
 static inline int write_header(struct log_c *log)
 {
-	unsigned long ebits;
-
 	header_to_disk(&log->header, log->disk_header);
-	return dm_io_sync_vm(1, &log->header_location, WRITE,
-			     log->disk_header, &ebits);
+	return rw_header(log, WRITE);
 }
 
 /*----------------------------------------------------------------
@@ -256,6 +263,7 @@
 	uint32_t region_size;
 	unsigned int region_count;
 	size_t bitset_size, buf_size;
+	int r;
 
 	if (argc < 1 || argc > 2) {
 		DMWARN("wrong number of arguments to mirror log");
@@ -315,6 +323,7 @@
 		lc->disk_header = NULL;
 	} else {
 		lc->log_dev = dev;
+		lc->log_dev_failed = 0;
 		lc->header_location.bdev = lc->log_dev->bdev;
 		lc->header_location.sector = 0;
 
@@ -324,6 +333,15 @@
 		buf_size = dm_round_up((LOG_OFFSET << SECTOR_SHIFT) +
 				       bitset_size, ti->limits.hardsect_size);
 		lc->header_location.count = buf_size >> SECTOR_SHIFT;
+		lc->io_req.mem.type = DM_IO_VMA;
+		lc->io_req.client = dm_io_client_create(dm_div_up(buf_size,
+								   PAGE_SIZE));
+		if (IS_ERR(lc->io_req.client)) {
+			r = PTR_ERR(lc->io_req.client);
+			DMWARN("couldn't allocate disk io client");
+			kfree(lc);
+			return -ENOMEM;
+		}
 
 		lc->disk_header = vmalloc(buf_size);
 		if (!lc->disk_header) {
@@ -424,6 +442,7 @@
 
 	dm_put_device(lc->ti, lc->log_dev);
 	vfree(lc->disk_header);
+	dm_io_client_destroy(lc->io_req.client);
 	destroy_log_context(lc);
 }
 
@@ -437,6 +456,15 @@
 	return count;
 }
 
+static void fail_log_device(struct log_c *lc)
+{
+	if (lc->log_dev_failed)
+		return;
+
+	lc->log_dev_failed = 1;
+	dm_table_event(lc->ti->table);
+}
+
 static int disk_resume(struct dirty_log *log)
 {
 	int r;
@@ -446,8 +474,19 @@
 
 	/* read the disk header */
 	r = read_header(lc);
-	if (r)
-		return r;
+	if (r) {
+		DMWARN("%s: Failed to read header on mirror log device",
+		       lc->log_dev->name);
+		fail_log_device(lc);
+		/*
+		 * If the log device cannot be read, we must assume
+		 * all regions are out-of-sync.  If we simply return
+		 * here, the state will be uninitialized and could
+		 * lead us to return 'in-sync' status for regions
+		 * that are actually 'out-of-sync'.
+		 */
+		lc->header.nr_regions = 0;
+	}
 
 	/* set or clear any new bits -- device has grown */
 	if (lc->sync == NOSYNC)
@@ -472,7 +511,14 @@
 	lc->header.nr_regions = lc->region_count;
 
 	/* write the new header */
-	return write_header(lc);
+	r = write_header(lc);
+	if (r) {
+		DMWARN("%s: Failed to write header on mirror log device",
+		       lc->log_dev->name);
+		fail_log_device(lc);
+	}
+
+	return r;
 }
 
 static uint32_t core_get_region_size(struct dirty_log *log)
@@ -516,7 +562,9 @@
 		return 0;
 
 	r = write_header(lc);
-	if (!r)
+	if (r)
+		fail_log_device(lc);
+	else
 		lc->touched = 0;
 
 	return r;
@@ -591,6 +639,7 @@
 
 	switch(status) {
 	case STATUSTYPE_INFO:
+		DMEMIT("1 %s", log->type->name);
 		break;
 
 	case STATUSTYPE_TABLE:
@@ -606,17 +655,17 @@
 		       char *result, unsigned int maxlen)
 {
 	int sz = 0;
-	char buffer[16];
 	struct log_c *lc = log->context;
 
 	switch(status) {
 	case STATUSTYPE_INFO:
+		DMEMIT("3 %s %s %c", log->type->name, lc->log_dev->name,
+		       lc->log_dev_failed ? 'D' : 'A');
 		break;
 
 	case STATUSTYPE_TABLE:
-		format_dev_t(buffer, lc->log_dev->bdev->bd_dev);
 		DMEMIT("%s %u %s %u ", log->type->name,
-		       lc->sync == DEFAULTSYNC ? 2 : 3, buffer,
+		       lc->sync == DEFAULTSYNC ? 2 : 3, lc->log_dev->name,
 		       lc->region_size);
 		DMEMIT_SYNC;
 	}
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 3aa0135..de54b39 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -668,6 +668,9 @@
 		return -EINVAL;
 	}
 
+	m->hw_handler.md = dm_table_get_md(ti->table);
+	dm_put(m->hw_handler.md);
+
 	r = hwht->create(&m->hw_handler, hw_argc - 1, as->argv);
 	if (r) {
 		dm_put_hw_handler(hwht);
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 23a6426..ef124b7 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -21,16 +21,12 @@
 #include <linux/workqueue.h>
 
 #define DM_MSG_PREFIX "raid1"
+#define DM_IO_PAGES 64
 
-static struct workqueue_struct *_kmirrord_wq;
-static struct work_struct _kmirrord_work;
+#define DM_RAID1_HANDLE_ERRORS 0x01
+
 static DECLARE_WAIT_QUEUE_HEAD(_kmirrord_recovery_stopped);
 
-static inline void wake(void)
-{
-	queue_work(_kmirrord_wq, &_kmirrord_work);
-}
-
 /*-----------------------------------------------------------------
  * Region hash
  *
@@ -125,17 +121,23 @@
 	struct list_head list;
 	struct region_hash rh;
 	struct kcopyd_client *kcopyd_client;
+	uint64_t features;
 
 	spinlock_t lock;	/* protects the next two lists */
 	struct bio_list reads;
 	struct bio_list writes;
 
+	struct dm_io_client *io_client;
+
 	/* recovery */
 	region_t nr_regions;
 	int in_sync;
 
 	struct mirror *default_mirror;	/* Default mirror */
 
+	struct workqueue_struct *kmirrord_wq;
+	struct work_struct kmirrord_work;
+
 	unsigned int nr_mirrors;
 	struct mirror mirror[0];
 };
@@ -153,6 +155,11 @@
 	return region << rh->region_shift;
 }
 
+static void wake(struct mirror_set *ms)
+{
+	queue_work(ms->kmirrord_wq, &ms->kmirrord_work);
+}
+
 /* FIXME move this */
 static void queue_bio(struct mirror_set *ms, struct bio *bio, int rw);
 
@@ -398,8 +405,7 @@
 		mempool_free(reg, rh->region_pool);
 	}
 
-	if (!list_empty(&recovered))
-		rh->log->type->flush(rh->log);
+	rh->log->type->flush(rh->log);
 
 	list_for_each_entry_safe (reg, next, &clean, list)
 		mempool_free(reg, rh->region_pool);
@@ -471,7 +477,7 @@
 	spin_unlock_irqrestore(&rh->region_lock, flags);
 
 	if (should_wake)
-		wake();
+		wake(rh->ms);
 }
 
 /*
@@ -558,7 +564,7 @@
 	list_add(&reg->list, &reg->rh->recovered_regions);
 	spin_unlock_irq(&rh->region_lock);
 
-	wake();
+	wake(rh->ms);
 }
 
 static void rh_flush(struct region_hash *rh)
@@ -592,7 +598,7 @@
 	for (i = 0; i < MAX_RECOVERY; i++)
 		up(&rh->recovery_count);
 
-	wake();
+	wake(rh->ms);
 }
 
 /*
@@ -735,7 +741,7 @@
 		/*
 		 * We can only read balance if the region is in sync.
 		 */
-		if (rh_in_sync(&ms->rh, region, 0))
+		if (rh_in_sync(&ms->rh, region, 1))
 			m = choose_mirror(ms, bio->bi_sector);
 		else
 			m = ms->default_mirror;
@@ -792,6 +798,14 @@
 	unsigned int i;
 	struct io_region io[KCOPYD_MAX_REGIONS+1];
 	struct mirror *m;
+	struct dm_io_request io_req = {
+		.bi_rw = WRITE,
+		.mem.type = DM_IO_BVEC,
+		.mem.ptr.bvec = bio->bi_io_vec + bio->bi_idx,
+		.notify.fn = write_callback,
+		.notify.context = bio,
+		.client = ms->io_client,
+	};
 
 	for (i = 0; i < ms->nr_mirrors; i++) {
 		m = ms->mirror + i;
@@ -802,9 +816,8 @@
 	}
 
 	bio_set_ms(bio, ms);
-	dm_io_async_bvec(ms->nr_mirrors, io, WRITE,
-			 bio->bi_io_vec + bio->bi_idx,
-			 write_callback, bio);
+
+	(void) dm_io(&io_req, ms->nr_mirrors, io, NULL);
 }
 
 static void do_writes(struct mirror_set *ms, struct bio_list *writes)
@@ -870,11 +883,10 @@
 /*-----------------------------------------------------------------
  * kmirrord
  *---------------------------------------------------------------*/
-static LIST_HEAD(_mirror_sets);
-static DECLARE_RWSEM(_mirror_sets_lock);
-
-static void do_mirror(struct mirror_set *ms)
+static void do_mirror(struct work_struct *work)
 {
+	struct mirror_set *ms =container_of(work, struct mirror_set,
+					    kmirrord_work);
 	struct bio_list reads, writes;
 
 	spin_lock(&ms->lock);
@@ -890,16 +902,6 @@
 	do_writes(ms, &writes);
 }
 
-static void do_work(struct work_struct *ignored)
-{
-	struct mirror_set *ms;
-
-	down_read(&_mirror_sets_lock);
-	list_for_each_entry (ms, &_mirror_sets, list)
-		do_mirror(ms);
-	up_read(&_mirror_sets_lock);
-}
-
 /*-----------------------------------------------------------------
  * Target functions
  *---------------------------------------------------------------*/
@@ -931,6 +933,13 @@
 	ms->in_sync = 0;
 	ms->default_mirror = &ms->mirror[DEFAULT_MIRROR];
 
+	ms->io_client = dm_io_client_create(DM_IO_PAGES);
+	if (IS_ERR(ms->io_client)) {
+		ti->error = "Error creating dm_io client";
+		kfree(ms);
+ 		return NULL;
+	}
+
 	if (rh_init(&ms->rh, ms, dl, region_size, ms->nr_regions)) {
 		ti->error = "Error creating dirty region hash";
 		kfree(ms);
@@ -946,6 +955,7 @@
 	while (m--)
 		dm_put_device(ti, ms->mirror[m].dev);
 
+	dm_io_client_destroy(ms->io_client);
 	rh_exit(&ms->rh);
 	kfree(ms);
 }
@@ -978,23 +988,6 @@
 	return 0;
 }
 
-static int add_mirror_set(struct mirror_set *ms)
-{
-	down_write(&_mirror_sets_lock);
-	list_add_tail(&ms->list, &_mirror_sets);
-	up_write(&_mirror_sets_lock);
-	wake();
-
-	return 0;
-}
-
-static void del_mirror_set(struct mirror_set *ms)
-{
-	down_write(&_mirror_sets_lock);
-	list_del(&ms->list);
-	up_write(&_mirror_sets_lock);
-}
-
 /*
  * Create dirty log: log_type #log_params <log_params>
  */
@@ -1037,16 +1030,55 @@
 	return dl;
 }
 
+static int parse_features(struct mirror_set *ms, unsigned argc, char **argv,
+			  unsigned *args_used)
+{
+	unsigned num_features;
+	struct dm_target *ti = ms->ti;
+
+	*args_used = 0;
+
+	if (!argc)
+		return 0;
+
+	if (sscanf(argv[0], "%u", &num_features) != 1) {
+		ti->error = "Invalid number of features";
+		return -EINVAL;
+	}
+
+	argc--;
+	argv++;
+	(*args_used)++;
+
+	if (num_features > argc) {
+		ti->error = "Not enough arguments to support feature count";
+		return -EINVAL;
+	}
+
+	if (!strcmp("handle_errors", argv[0]))
+		ms->features |= DM_RAID1_HANDLE_ERRORS;
+	else {
+		ti->error = "Unrecognised feature requested";
+		return -EINVAL;
+	}
+
+	(*args_used)++;
+
+	return 0;
+}
+
 /*
  * Construct a mirror mapping:
  *
  * log_type #log_params <log_params>
  * #mirrors [mirror_path offset]{2,}
+ * [#features <features>]
  *
  * log_type is "core" or "disk"
  * #log_params is between 1 and 3
+ *
+ * If present, features must be "handle_errors".
  */
-#define DM_IO_PAGES 64
 static int mirror_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 {
 	int r;
@@ -1070,8 +1102,8 @@
 
 	argv++, argc--;
 
-	if (argc != nr_mirrors * 2) {
-		ti->error = "Wrong number of mirror arguments";
+	if (argc < nr_mirrors * 2) {
+		ti->error = "Too few mirror arguments";
 		dm_destroy_dirty_log(dl);
 		return -EINVAL;
 	}
@@ -1096,13 +1128,37 @@
 	ti->private = ms;
  	ti->split_io = ms->rh.region_size;
 
-	r = kcopyd_client_create(DM_IO_PAGES, &ms->kcopyd_client);
+	ms->kmirrord_wq = create_singlethread_workqueue("kmirrord");
+	if (!ms->kmirrord_wq) {
+		DMERR("couldn't start kmirrord");
+		free_context(ms, ti, m);
+		return -ENOMEM;
+	}
+	INIT_WORK(&ms->kmirrord_work, do_mirror);
+
+	r = parse_features(ms, argc, argv, &args_used);
 	if (r) {
 		free_context(ms, ti, ms->nr_mirrors);
 		return r;
 	}
 
-	add_mirror_set(ms);
+	argv += args_used;
+	argc -= args_used;
+
+	if (argc) {
+		ti->error = "Too many mirror arguments";
+		free_context(ms, ti, ms->nr_mirrors);
+		return -EINVAL;
+	}
+
+	r = kcopyd_client_create(DM_IO_PAGES, &ms->kcopyd_client);
+	if (r) {
+		destroy_workqueue(ms->kmirrord_wq);
+		free_context(ms, ti, ms->nr_mirrors);
+		return r;
+	}
+
+	wake(ms);
 	return 0;
 }
 
@@ -1110,8 +1166,9 @@
 {
 	struct mirror_set *ms = (struct mirror_set *) ti->private;
 
-	del_mirror_set(ms);
+	flush_workqueue(ms->kmirrord_wq);
 	kcopyd_client_destroy(ms->kcopyd_client);
+	destroy_workqueue(ms->kmirrord_wq);
 	free_context(ms, ti, ms->nr_mirrors);
 }
 
@@ -1127,7 +1184,7 @@
 	spin_unlock(&ms->lock);
 
 	if (should_wake)
-		wake();
+		wake(ms);
 }
 
 /*
@@ -1222,11 +1279,9 @@
 static int mirror_status(struct dm_target *ti, status_type_t type,
 			 char *result, unsigned int maxlen)
 {
-	unsigned int m, sz;
+	unsigned int m, sz = 0;
 	struct mirror_set *ms = (struct mirror_set *) ti->private;
 
-	sz = ms->rh.log->type->status(ms->rh.log, type, result, maxlen);
-
 	switch (type) {
 	case STATUSTYPE_INFO:
 		DMEMIT("%d ", ms->nr_mirrors);
@@ -1237,13 +1292,21 @@
 			(unsigned long long)ms->rh.log->type->
 				get_sync_count(ms->rh.log),
 			(unsigned long long)ms->nr_regions);
+
+		sz = ms->rh.log->type->status(ms->rh.log, type, result, maxlen);
+
 		break;
 
 	case STATUSTYPE_TABLE:
+		sz = ms->rh.log->type->status(ms->rh.log, type, result, maxlen);
+
 		DMEMIT("%d", ms->nr_mirrors);
 		for (m = 0; m < ms->nr_mirrors; m++)
 			DMEMIT(" %s %llu", ms->mirror[m].dev->name,
 				(unsigned long long)ms->mirror[m].offset);
+
+		if (ms->features & DM_RAID1_HANDLE_ERRORS)
+			DMEMIT(" 1 handle_errors");
 	}
 
 	return 0;
@@ -1251,7 +1314,7 @@
 
 static struct target_type mirror_target = {
 	.name	 = "mirror",
-	.version = {1, 0, 2},
+	.version = {1, 0, 3},
 	.module	 = THIS_MODULE,
 	.ctr	 = mirror_ctr,
 	.dtr	 = mirror_dtr,
@@ -1270,20 +1333,11 @@
 	if (r)
 		return r;
 
-	_kmirrord_wq = create_singlethread_workqueue("kmirrord");
-	if (!_kmirrord_wq) {
-		DMERR("couldn't start kmirrord");
-		dm_dirty_log_exit();
-		return r;
-	}
-	INIT_WORK(&_kmirrord_work, do_work);
-
 	r = dm_register_target(&mirror_target);
 	if (r < 0) {
 		DMERR("%s: Failed to register mirror target",
 		      mirror_target.name);
 		dm_dirty_log_exit();
-		destroy_workqueue(_kmirrord_wq);
 	}
 
 	return r;
@@ -1297,7 +1351,6 @@
 	if (r < 0)
 		DMERR("%s: unregister failed %d", mirror_target.name, r);
 
-	destroy_workqueue(_kmirrord_wq);
 	dm_dirty_log_exit();
 }
 
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 05befa9..2fc199b 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -425,13 +425,15 @@
 }
 
 /*
- * If possible (ie. blk_size[major] is set), this checks an area
- * of a destination device is valid.
+ * If possible, this checks an area of a destination device is valid.
  */
 static int check_device_area(struct dm_dev *dd, sector_t start, sector_t len)
 {
-	sector_t dev_size;
-	dev_size = dd->bdev->bd_inode->i_size >> SECTOR_SHIFT;
+	sector_t dev_size = dd->bdev->bd_inode->i_size >> SECTOR_SHIFT;
+
+	if (!dev_size)
+		return 1;
+
 	return ((start < dev_size) && (len <= (dev_size - start)));
 }
 
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 11a98df..2717a35 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1236,6 +1236,7 @@
 		free_dev(md);
 	}
 }
+EXPORT_SYMBOL_GPL(dm_put);
 
 /*
  * Process the deferred bios
diff --git a/drivers/md/kcopyd.c b/drivers/md/kcopyd.c
index b46f6c5..dbc234e 100644
--- a/drivers/md/kcopyd.c
+++ b/drivers/md/kcopyd.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2002 Sistina Software (UK) Limited.
+ * Copyright (C) 2006 Red Hat GmbH
  *
  * This file is released under the GPL.
  *
@@ -45,6 +46,8 @@
 	unsigned int nr_pages;
 	unsigned int nr_free_pages;
 
+	struct dm_io_client *io_client;
+
 	wait_queue_head_t destroyq;
 	atomic_t nr_jobs;
 };
@@ -342,16 +345,20 @@
 static int run_io_job(struct kcopyd_job *job)
 {
 	int r;
+	struct dm_io_request io_req = {
+		.bi_rw = job->rw,
+		.mem.type = DM_IO_PAGE_LIST,
+		.mem.ptr.pl = job->pages,
+		.mem.offset = job->offset,
+		.notify.fn = complete_io,
+		.notify.context = job,
+		.client = job->kc->io_client,
+	};
 
 	if (job->rw == READ)
-		r = dm_io_async(1, &job->source, job->rw,
-				job->pages,
-				job->offset, complete_io, job);
-
+		r = dm_io(&io_req, 1, &job->source, NULL);
 	else
-		r = dm_io_async(job->num_dests, job->dests, job->rw,
-				job->pages,
-				job->offset, complete_io, job);
+		r = dm_io(&io_req, job->num_dests, job->dests, NULL);
 
 	return r;
 }
@@ -670,8 +677,9 @@
 		return r;
 	}
 
-	r = dm_io_get(nr_pages);
-	if (r) {
+	kc->io_client = dm_io_client_create(nr_pages);
+	if (IS_ERR(kc->io_client)) {
+		r = PTR_ERR(kc->io_client);
 		client_free_pages(kc);
 		kfree(kc);
 		kcopyd_exit();
@@ -691,7 +699,7 @@
 	/* Wait for completion of all jobs submitted by this client. */
 	wait_event(kc->destroyq, !atomic_read(&kc->nr_jobs));
 
-	dm_io_put(kc->nr_pages);
+	dm_io_client_destroy(kc->io_client);
 	client_free_pages(kc);
 	client_del(kc);
 	kfree(kc);
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 2b4315d..2901d0c 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -33,6 +33,7 @@
 */
 
 #include <linux/module.h>
+#include <linux/kernel.h>
 #include <linux/kthread.h>
 #include <linux/linkage.h>
 #include <linux/raid/md.h>
@@ -273,6 +274,7 @@
 	atomic_set(&new->active, 1);
 	spin_lock_init(&new->write_lock);
 	init_waitqueue_head(&new->sb_wait);
+	new->reshape_position = MaxSector;
 
 	new->queue = blk_alloc_queue(GFP_KERNEL);
 	if (!new->queue) {
@@ -589,14 +591,41 @@
 	return ret;
 }
 
+
+static u32 md_csum_fold(u32 csum)
+{
+	csum = (csum & 0xffff) + (csum >> 16);
+	return (csum & 0xffff) + (csum >> 16);
+}
+
 static unsigned int calc_sb_csum(mdp_super_t * sb)
 {
+	u64 newcsum = 0;
+	u32 *sb32 = (u32*)sb;
+	int i;
 	unsigned int disk_csum, csum;
 
 	disk_csum = sb->sb_csum;
 	sb->sb_csum = 0;
-	csum = csum_partial((void *)sb, MD_SB_BYTES, 0);
+
+	for (i = 0; i < MD_SB_BYTES/4 ; i++)
+		newcsum += sb32[i];
+	csum = (newcsum & 0xffffffff) + (newcsum>>32);
+
+
+#ifdef CONFIG_ALPHA
+	/* This used to use csum_partial, which was wrong for several
+	 * reasons including that different results are returned on
+	 * different architectures.  It isn't critical that we get exactly
+	 * the same return value as before (we always csum_fold before
+	 * testing, and that removes any differences).  However as we
+	 * know that csum_partial always returned a 16bit value on
+	 * alphas, do a fold to maximise conformity to previous behaviour.
+	 */
+	sb->sb_csum = md_csum_fold(disk_csum);
+#else
 	sb->sb_csum = disk_csum;
+#endif
 	return csum;
 }
 
@@ -684,7 +713,7 @@
 	if (sb->raid_disks <= 0)
 		goto abort;
 
-	if (csum_fold(calc_sb_csum(sb)) != csum_fold(sb->sb_csum)) {
+	if (md_csum_fold(calc_sb_csum(sb)) != md_csum_fold(sb->sb_csum)) {
 		printk(KERN_WARNING "md: invalid superblock checksum on %s\n",
 			b);
 		goto abort;
@@ -694,6 +723,17 @@
 	rdev->data_offset = 0;
 	rdev->sb_size = MD_SB_BYTES;
 
+	if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) {
+		if (sb->level != 1 && sb->level != 4
+		    && sb->level != 5 && sb->level != 6
+		    && sb->level != 10) {
+			/* FIXME use a better test */
+			printk(KERN_WARNING
+			       "md: bitmaps not supported for this level.\n");
+			goto abort;
+		}
+	}
+
 	if (sb->level == LEVEL_MULTIPATH)
 		rdev->desc_nr = -1;
 	else
@@ -792,16 +832,8 @@
 		mddev->max_disks = MD_SB_DISKS;
 
 		if (sb->state & (1<<MD_SB_BITMAP_PRESENT) &&
-		    mddev->bitmap_file == NULL) {
-			if (mddev->level != 1 && mddev->level != 4
-			    && mddev->level != 5 && mddev->level != 6
-			    && mddev->level != 10) {
-				/* FIXME use a better test */
-				printk(KERN_WARNING "md: bitmaps not supported for this level.\n");
-				return -EINVAL;
-			}
+		    mddev->bitmap_file == NULL)
 			mddev->bitmap_offset = mddev->default_bitmap_offset;
-		}
 
 	} else if (mddev->pers == NULL) {
 		/* Insist on good event counter while assembling */
@@ -1058,6 +1090,18 @@
 		       bdevname(rdev->bdev,b));
 		return -EINVAL;
 	}
+	if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET)) {
+		if (sb->level != cpu_to_le32(1) &&
+		    sb->level != cpu_to_le32(4) &&
+		    sb->level != cpu_to_le32(5) &&
+		    sb->level != cpu_to_le32(6) &&
+		    sb->level != cpu_to_le32(10)) {
+			printk(KERN_WARNING
+			       "md: bitmaps not supported for this level.\n");
+			return -EINVAL;
+		}
+	}
+
 	rdev->preferred_minor = 0xffff;
 	rdev->data_offset = le64_to_cpu(sb->data_offset);
 	atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read));
@@ -1141,14 +1185,9 @@
 		mddev->max_disks =  (4096-256)/2;
 
 		if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) &&
-		    mddev->bitmap_file == NULL ) {
-			if (mddev->level != 1 && mddev->level != 5 && mddev->level != 6
-			    && mddev->level != 10) {
-				printk(KERN_WARNING "md: bitmaps not supported for this level.\n");
-				return -EINVAL;
-			}
+		    mddev->bitmap_file == NULL )
 			mddev->bitmap_offset = (__s32)le32_to_cpu(sb->bitmap_offset);
-		}
+
 		if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) {
 			mddev->reshape_position = le64_to_cpu(sb->reshape_position);
 			mddev->delta_disks = le32_to_cpu(sb->delta_disks);
@@ -2204,6 +2243,10 @@
 layout_show(mddev_t *mddev, char *page)
 {
 	/* just a number, not meaningful for all levels */
+	if (mddev->reshape_position != MaxSector &&
+	    mddev->layout != mddev->new_layout)
+		return sprintf(page, "%d (%d)\n",
+			       mddev->new_layout, mddev->layout);
 	return sprintf(page, "%d\n", mddev->layout);
 }
 
@@ -2212,13 +2255,16 @@
 {
 	char *e;
 	unsigned long n = simple_strtoul(buf, &e, 10);
-	if (mddev->pers)
-		return -EBUSY;
 
 	if (!*buf || (*e && *e != '\n'))
 		return -EINVAL;
 
-	mddev->layout = n;
+	if (mddev->pers)
+		return -EBUSY;
+	if (mddev->reshape_position != MaxSector)
+		mddev->new_layout = n;
+	else
+		mddev->layout = n;
 	return len;
 }
 static struct md_sysfs_entry md_layout =
@@ -2230,6 +2276,10 @@
 {
 	if (mddev->raid_disks == 0)
 		return 0;
+	if (mddev->reshape_position != MaxSector &&
+	    mddev->delta_disks != 0)
+		return sprintf(page, "%d (%d)\n", mddev->raid_disks,
+			       mddev->raid_disks - mddev->delta_disks);
 	return sprintf(page, "%d\n", mddev->raid_disks);
 }
 
@@ -2247,7 +2297,11 @@
 
 	if (mddev->pers)
 		rv = update_raid_disks(mddev, n);
-	else
+	else if (mddev->reshape_position != MaxSector) {
+		int olddisks = mddev->raid_disks - mddev->delta_disks;
+		mddev->delta_disks = n - olddisks;
+		mddev->raid_disks = n;
+	} else
 		mddev->raid_disks = n;
 	return rv ? rv : len;
 }
@@ -2257,6 +2311,10 @@
 static ssize_t
 chunk_size_show(mddev_t *mddev, char *page)
 {
+	if (mddev->reshape_position != MaxSector &&
+	    mddev->chunk_size != mddev->new_chunk)
+		return sprintf(page, "%d (%d)\n", mddev->new_chunk,
+			       mddev->chunk_size);
 	return sprintf(page, "%d\n", mddev->chunk_size);
 }
 
@@ -2267,12 +2325,15 @@
 	char *e;
 	unsigned long n = simple_strtoul(buf, &e, 10);
 
-	if (mddev->pers)
-		return -EBUSY;
 	if (!*buf || (*e && *e != '\n'))
 		return -EINVAL;
 
-	mddev->chunk_size = n;
+	if (mddev->pers)
+		return -EBUSY;
+	else if (mddev->reshape_position != MaxSector)
+		mddev->new_chunk = n;
+	else
+		mddev->chunk_size = n;
 	return len;
 }
 static struct md_sysfs_entry md_chunk_size =
@@ -2637,8 +2698,7 @@
 	minor = simple_strtoul(buf, &e, 10);
 	if (e==buf || (*e && *e != '\n') )
 		return -EINVAL;
-	if (major >= sizeof(super_types)/sizeof(super_types[0]) ||
-	    super_types[major].name == NULL)
+	if (major >= ARRAY_SIZE(super_types) || super_types[major].name == NULL)
 		return -ENOENT;
 	mddev->major_version = major;
 	mddev->minor_version = minor;
@@ -2859,6 +2919,37 @@
 static struct md_sysfs_entry md_suspend_hi =
 __ATTR(suspend_hi, S_IRUGO|S_IWUSR, suspend_hi_show, suspend_hi_store);
 
+static ssize_t
+reshape_position_show(mddev_t *mddev, char *page)
+{
+	if (mddev->reshape_position != MaxSector)
+		return sprintf(page, "%llu\n",
+			       (unsigned long long)mddev->reshape_position);
+	strcpy(page, "none\n");
+	return 5;
+}
+
+static ssize_t
+reshape_position_store(mddev_t *mddev, const char *buf, size_t len)
+{
+	char *e;
+	unsigned long long new = simple_strtoull(buf, &e, 10);
+	if (mddev->pers)
+		return -EBUSY;
+	if (buf == e || (*e && *e != '\n'))
+		return -EINVAL;
+	mddev->reshape_position = new;
+	mddev->delta_disks = 0;
+	mddev->new_level = mddev->level;
+	mddev->new_layout = mddev->layout;
+	mddev->new_chunk = mddev->chunk_size;
+	return len;
+}
+
+static struct md_sysfs_entry md_reshape_position =
+__ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show,
+       reshape_position_store);
+
 
 static struct attribute *md_default_attrs[] = {
 	&md_level.attr,
@@ -2871,6 +2962,7 @@
 	&md_new_device.attr,
 	&md_safe_delay.attr,
 	&md_array_state.attr,
+	&md_reshape_position.attr,
 	NULL,
 };
 
@@ -3012,6 +3104,7 @@
 	struct gendisk *disk;
 	struct mdk_personality *pers;
 	char b[BDEVNAME_SIZE];
+	struct block_device *bdev;
 
 	if (list_empty(&mddev->disks))
 		/* cannot run an array with no devices.. */
@@ -3239,7 +3332,13 @@
 	md_wakeup_thread(mddev->thread);
 	md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */
 
-	mddev->changed = 1;
+	bdev = bdget_disk(mddev->gendisk, 0);
+	if (bdev) {
+		bd_set_size(bdev, mddev->array_size << 1);
+		blkdev_ioctl(bdev->bd_inode, NULL, BLKRRPART, 0);
+		bdput(bdev);
+	}
+
 	md_new_event(mddev);
 	kobject_uevent(&mddev->gendisk->kobj, KOBJ_CHANGE);
 	return 0;
@@ -3361,7 +3460,6 @@
 			mddev->pers = NULL;
 
 			set_capacity(disk, 0);
-			mddev->changed = 1;
 
 			if (mddev->ro)
 				mddev->ro = 0;
@@ -3409,6 +3507,7 @@
 		mddev->size = 0;
 		mddev->raid_disks = 0;
 		mddev->recovery_cp = 0;
+		mddev->reshape_position = MaxSector;
 
 	} else if (mddev->pers)
 		printk(KERN_INFO "md: %s switched to read-only mode.\n",
@@ -4019,7 +4118,7 @@
 	if (info->raid_disks == 0) {
 		/* just setting version number for superblock loading */
 		if (info->major_version < 0 ||
-		    info->major_version >= sizeof(super_types)/sizeof(super_types[0]) ||
+		    info->major_version >= ARRAY_SIZE(super_types) ||
 		    super_types[info->major_version].name == NULL) {
 			/* maybe try to auto-load a module? */
 			printk(KERN_INFO 
@@ -4500,20 +4599,6 @@
 	return 0;
 }
 
-static int md_media_changed(struct gendisk *disk)
-{
-	mddev_t *mddev = disk->private_data;
-
-	return mddev->changed;
-}
-
-static int md_revalidate(struct gendisk *disk)
-{
-	mddev_t *mddev = disk->private_data;
-
-	mddev->changed = 0;
-	return 0;
-}
 static struct block_device_operations md_fops =
 {
 	.owner		= THIS_MODULE,
@@ -4521,8 +4606,6 @@
 	.release	= md_release,
 	.ioctl		= md_ioctl,
 	.getgeo		= md_getgeo,
-	.media_changed	= md_media_changed,
-	.revalidate_disk= md_revalidate,
 };
 
 static int md_thread(void * arg)
@@ -4941,15 +5024,6 @@
 	return error;
 }
 
-static int md_seq_release(struct inode *inode, struct file *file)
-{
-	struct seq_file *m = file->private_data;
-	struct mdstat_info *mi = m->private;
-	m->private = NULL;
-	kfree(mi);
-	return seq_release(inode, file);
-}
-
 static unsigned int mdstat_poll(struct file *filp, poll_table *wait)
 {
 	struct seq_file *m = filp->private_data;
@@ -4971,7 +5045,7 @@
 	.open           = md_seq_open,
 	.read           = seq_read,
 	.llseek         = seq_lseek,
-	.release	= md_seq_release,
+	.release	= seq_release_private,
 	.poll		= mdstat_poll,
 };
 
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 97ee870..1b7130c 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2063,7 +2063,6 @@
 	 */
 	mddev->array_size = sectors>>1;
 	set_capacity(mddev->gendisk, mddev->array_size << 1);
-	mddev->changed = 1;
 	if (mddev->array_size > mddev->size && mddev->recovery_cp == MaxSector) {
 		mddev->recovery_cp = mddev->size << 1;
 		set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 8d59914..a72e70a 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -353,8 +353,8 @@
 	struct kmem_cache *sc;
 	int devs = conf->raid_disks;
 
-	sprintf(conf->cache_name[0], "raid5/%s", mdname(conf->mddev));
-	sprintf(conf->cache_name[1], "raid5/%s-alt", mdname(conf->mddev));
+	sprintf(conf->cache_name[0], "raid5-%s", mdname(conf->mddev));
+	sprintf(conf->cache_name[1], "raid5-%s-alt", mdname(conf->mddev));
 	conf->active_name = 0;
 	sc = kmem_cache_create(conf->cache_name[conf->active_name],
 			       sizeof(struct stripe_head)+(devs-1)*sizeof(struct r5dev),
@@ -3864,7 +3864,6 @@
 	sectors &= ~((sector_t)mddev->chunk_size/512 - 1);
 	mddev->array_size = (sectors * (mddev->raid_disks-conf->max_degraded))>>1;
 	set_capacity(mddev->gendisk, mddev->array_size << 1);
-	mddev->changed = 1;
 	if (sectors/2  > mddev->size && mddev->recovery_cp == MaxSector) {
 		mddev->recovery_cp = mddev->size << 1;
 		set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
@@ -3999,7 +3998,6 @@
 		conf->mddev->array_size = conf->mddev->size *
 			(conf->raid_disks - conf->max_degraded);
 		set_capacity(conf->mddev->gendisk, conf->mddev->array_size << 1);
-		conf->mddev->changed = 1;
 
 		bdev = bdget_disk(conf->mddev->gendisk, 0);
 		if (bdev) {
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index b6c1670..7385acf 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -501,9 +501,9 @@
 {
 #ifdef CONFIG_MMC_DEBUG
 	unsigned long flags;
-	spin_lock_irqsave(host->lock, flags);
+	spin_lock_irqsave(&host->lock, flags);
 	BUG_ON(host->removed);
-	spin_unlock_irqrestore(host->lock, flags);
+	spin_unlock_irqrestore(&host->lock, flags);
 #endif
 
 	mmc_schedule_delayed_work(&host->detect, delay);
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 3a03a74..637ae8f 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -1214,7 +1214,7 @@
 	int i;
 #endif
 
-	flush_scheduled_work();
+	cancel_work_sync(&adapter->reset_task);
 
 	e1000_release_manageability(adapter);
 
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index eed433d..f71dab3 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -662,10 +662,10 @@
 		phy_error(phydev);
 
 	/*
-	 * Finish any pending work; we might have been scheduled
-	 * to be called from keventd ourselves, though.
+	 * Finish any pending work; we might have been scheduled to be called
+	 * from keventd ourselves, but cancel_work_sync() handles that.
 	 */
-	run_scheduled_work(&phydev->phy_queue);
+	cancel_work_sync(&phydev->phy_queue);
 
 	free_irq(phydev->irq, phydev);
 
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index e5e901e..923b9c7 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -3716,10 +3716,8 @@
 	unsigned int restart_timer;
 
 	tg3_full_lock(tp, 0);
-	tp->tg3_flags |= TG3_FLAG_IN_RESET_TASK;
 
 	if (!netif_running(tp->dev)) {
-		tp->tg3_flags &= ~TG3_FLAG_IN_RESET_TASK;
 		tg3_full_unlock(tp);
 		return;
 	}
@@ -3750,8 +3748,6 @@
 		mod_timer(&tp->timer, jiffies + 1);
 
 out:
-	tp->tg3_flags &= ~TG3_FLAG_IN_RESET_TASK;
-
 	tg3_full_unlock(tp);
 }
 
@@ -7390,12 +7386,7 @@
 {
 	struct tg3 *tp = netdev_priv(dev);
 
-	/* Calling flush_scheduled_work() may deadlock because
-	 * linkwatch_event() may be on the workqueue and it will try to get
-	 * the rtnl_lock which we are holding.
-	 */
-	while (tp->tg3_flags & TG3_FLAG_IN_RESET_TASK)
-		msleep(1);
+	cancel_work_sync(&tp->reset_task);
 
 	netif_stop_queue(dev);
 
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 4d334cf..bd9f4f4 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2228,7 +2228,7 @@
 #define TG3_FLAG_JUMBO_RING_ENABLE	0x00800000
 #define TG3_FLAG_10_100_ONLY		0x01000000
 #define TG3_FLAG_PAUSE_AUTONEG		0x02000000
-#define TG3_FLAG_IN_RESET_TASK		0x04000000
+
 #define TG3_FLAG_40BIT_DMA_BUG		0x08000000
 #define TG3_FLAG_BROKEN_CHECKSUMS	0x10000000
 #define TG3_FLAG_SUPPORT_MSI		0x20000000
diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c
index 66e7bc9..1d8a2f6 100644
--- a/drivers/spi/atmel_spi.c
+++ b/drivers/spi/atmel_spi.c
@@ -22,10 +22,7 @@
 #include <asm/io.h>
 #include <asm/arch/board.h>
 #include <asm/arch/gpio.h>
-
-#ifdef CONFIG_ARCH_AT91
 #include <asm/arch/cpu.h>
-#endif
 
 #include "atmel_spi.h"
 
@@ -552,10 +549,8 @@
 		goto out_free_buffer;
 	as->irq = irq;
 	as->clk = clk;
-#ifdef CONFIG_ARCH_AT91
 	if (!cpu_is_at91rm9200())
 		as->new_1 = 1;
-#endif
 
 	ret = request_irq(irq, atmel_spi_interrupt, 0,
 			pdev->dev.bus_id, master);
diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c
index b082d95..11e9b15 100644
--- a/drivers/usb/atm/usbatm.c
+++ b/drivers/usb/atm/usbatm.c
@@ -1033,7 +1033,7 @@
 
 static int usbatm_heavy_init(struct usbatm_data *instance)
 {
-	int ret = kernel_thread(usbatm_do_heavy_init, instance, CLONE_KERNEL);
+	int ret = kernel_thread(usbatm_do_heavy_init, instance, CLONE_FS | CLONE_FILES);
 
 	if (ret < 0) {
 		usb_err(instance, "%s: failed to create kernel_thread (%d)!\n", __func__, ret);
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 1132ba5..9a256d2 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1348,6 +1348,20 @@
 	  Please read the <file:Documentation/fb/README-sstfb.txt> for supported
 	  options and other important info  support.
 
+config FB_VT8623
+	tristate "VIA VT8623 support"
+	depends on FB && PCI
+	select FB_CFB_FILLRECT
+	select FB_CFB_COPYAREA
+	select FB_CFB_IMAGEBLIT
+	select FB_TILEBLITTING
+	select FB_SVGALIB
+	select VGASTATE
+	select FONT_8x16 if FRAMEBUFFER_CONSOLE
+	---help---
+	  Driver for CastleRock integrated graphics core in the
+	  VIA VT8623 [Apollo CLE266] chipset.
+
 config FB_CYBLA
 	tristate "Cyberblade/i1 support"
 	depends on FB && PCI && X86_32 && !64BIT
@@ -1401,6 +1415,20 @@
 	This will compile the Trident frame buffer device with
 	acceleration functions.
 
+config FB_ARK
+	tristate "ARK 2000PV support"
+	depends on FB && PCI
+	select FB_CFB_FILLRECT
+	select FB_CFB_COPYAREA
+	select FB_CFB_IMAGEBLIT
+	select FB_TILEBLITTING
+	select FB_SVGALIB
+	select VGASTATE
+	select FONT_8x16 if FRAMEBUFFER_CONSOLE
+	---help---
+	  Driver for PCI graphics boards with ARK 2000PV chip
+	  and ICS 5342 RAMDAC.
+
 config FB_PM3
 	tristate "Permedia3 support"
 	depends on FB && PCI && BROKEN
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index a916c20..0b70567 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -54,10 +54,12 @@
 obj-$(CONFIG_FB_CT65550)          += chipsfb.o
 obj-$(CONFIG_FB_IMSTT)            += imsttfb.o
 obj-$(CONFIG_FB_FM2)              += fm2fb.o
+obj-$(CONFIG_FB_VT8623)           += vt8623fb.o
 obj-$(CONFIG_FB_CYBLA)            += cyblafb.o
 obj-$(CONFIG_FB_TRIDENT)          += tridentfb.o
 obj-$(CONFIG_FB_LE80578)          += vermilion/
 obj-$(CONFIG_FB_S3)               += s3fb.o
+obj-$(CONFIG_FB_ARK)              += arkfb.o
 obj-$(CONFIG_FB_STI)              += stifb.o
 obj-$(CONFIG_FB_FFB)              += ffb.o sbuslib.o
 obj-$(CONFIG_FB_CG6)              += cg6.o sbuslib.o
diff --git a/drivers/video/arkfb.c b/drivers/video/arkfb.c
new file mode 100644
index 0000000..ba6fede
--- /dev/null
+++ b/drivers/video/arkfb.c
@@ -0,0 +1,1200 @@
+/*
+ *  linux/drivers/video/arkfb.c -- Frame buffer device driver for ARK 2000PV
+ *  with ICS 5342 dac (it is easy to add support for different dacs).
+ *
+ *  Copyright (c) 2007 Ondrej Zajicek <santiago@crfreenet.org>
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ *
+ *  Code is based on s3fb
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/svga.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/console.h> /* Why should fb driver call console functions? because acquire_console_sem() */
+#include <video/vga.h>
+
+#ifdef CONFIG_MTRR
+#include <asm/mtrr.h>
+#endif
+
+struct arkfb_info {
+	int mclk_freq;
+	int mtrr_reg;
+
+	struct dac_info *dac;
+	struct vgastate state;
+	struct mutex open_lock;
+	unsigned int ref_count;
+	u32 pseudo_palette[16];
+};
+
+
+/* ------------------------------------------------------------------------- */
+
+
+static const struct svga_fb_format arkfb_formats[] = {
+	{ 0,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
+		FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP4,	FB_VISUAL_PSEUDOCOLOR, 8, 8},
+	{ 4,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
+		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_PSEUDOCOLOR, 8, 16},
+	{ 4,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 1,
+		FB_TYPE_INTERLEAVED_PLANES, 1,		FB_VISUAL_PSEUDOCOLOR, 8, 16},
+	{ 8,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
+		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_PSEUDOCOLOR, 8, 8},
+	{16,  {10, 5, 0}, {5, 5, 0},  {0, 5, 0}, {0, 0, 0}, 0,
+		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_TRUECOLOR, 4, 4},
+	{16,  {11, 5, 0}, {5, 6, 0},  {0, 5, 0}, {0, 0, 0}, 0,
+		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_TRUECOLOR, 4, 4},
+	{24,  {16, 8, 0}, {8, 8, 0},  {0, 8, 0}, {0, 0, 0}, 0,
+		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_TRUECOLOR, 8, 8},
+	{32,  {16, 8, 0}, {8, 8, 0},  {0, 8, 0}, {0, 0, 0}, 0,
+		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_TRUECOLOR, 2, 2},
+	SVGA_FORMAT_END
+};
+
+
+/* CRT timing register sets */
+
+static const struct vga_regset ark_h_total_regs[]        = {{0x00, 0, 7}, {0x41, 7, 7}, VGA_REGSET_END};
+static const struct vga_regset ark_h_display_regs[]      = {{0x01, 0, 7}, {0x41, 6, 6}, VGA_REGSET_END};
+static const struct vga_regset ark_h_blank_start_regs[]  = {{0x02, 0, 7}, {0x41, 5, 5}, VGA_REGSET_END};
+static const struct vga_regset ark_h_blank_end_regs[]    = {{0x03, 0, 4}, {0x05, 7, 7	}, VGA_REGSET_END};
+static const struct vga_regset ark_h_sync_start_regs[]   = {{0x04, 0, 7}, {0x41, 4, 4}, VGA_REGSET_END};
+static const struct vga_regset ark_h_sync_end_regs[]     = {{0x05, 0, 4}, VGA_REGSET_END};
+
+static const struct vga_regset ark_v_total_regs[]        = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x40, 7, 7}, VGA_REGSET_END};
+static const struct vga_regset ark_v_display_regs[]      = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x40, 6, 6}, VGA_REGSET_END};
+static const struct vga_regset ark_v_blank_start_regs[]  = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x40, 5, 5}, VGA_REGSET_END};
+// const struct vga_regset ark_v_blank_end_regs[]    = {{0x16, 0, 6}, VGA_REGSET_END};
+static const struct vga_regset ark_v_blank_end_regs[]    = {{0x16, 0, 7}, VGA_REGSET_END};
+static const struct vga_regset ark_v_sync_start_regs[]   = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x40, 4, 4}, VGA_REGSET_END};
+static const struct vga_regset ark_v_sync_end_regs[]     = {{0x11, 0, 3}, VGA_REGSET_END};
+
+static const struct vga_regset ark_line_compare_regs[]   = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, VGA_REGSET_END};
+static const struct vga_regset ark_start_address_regs[]  = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x40, 0, 2}, VGA_REGSET_END};
+static const struct vga_regset ark_offset_regs[]         = {{0x13, 0, 7}, {0x41, 3, 3}, VGA_REGSET_END};
+
+static const struct svga_timing_regs ark_timing_regs     = {
+	ark_h_total_regs, ark_h_display_regs, ark_h_blank_start_regs,
+	ark_h_blank_end_regs, ark_h_sync_start_regs, ark_h_sync_end_regs,
+	ark_v_total_regs, ark_v_display_regs, ark_v_blank_start_regs,
+	ark_v_blank_end_regs, ark_v_sync_start_regs, ark_v_sync_end_regs,
+};
+
+
+/* ------------------------------------------------------------------------- */
+
+
+/* Module parameters */
+
+static char *mode = "640x480-8@60";
+
+#ifdef CONFIG_MTRR
+static int mtrr = 1;
+#endif
+
+MODULE_AUTHOR("(c) 2007 Ondrej Zajicek <santiago@crfreenet.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("fbdev driver for ARK 2000PV");
+
+module_param(mode, charp, 0444);
+MODULE_PARM_DESC(mode, "Default video mode ('640x480-8@60', etc)");
+
+#ifdef CONFIG_MTRR
+module_param(mtrr, int, 0444);
+MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
+#endif
+
+static int threshold = 4;
+
+module_param(threshold, int, 0644);
+MODULE_PARM_DESC(threshold, "FIFO threshold");
+
+
+/* ------------------------------------------------------------------------- */
+
+
+static void arkfb_settile(struct fb_info *info, struct fb_tilemap *map)
+{
+	const u8 *font = map->data;
+	u8 __iomem *fb = (u8 __iomem *)info->screen_base;
+	int i, c;
+
+	if ((map->width != 8) || (map->height != 16) ||
+	    (map->depth != 1) || (map->length != 256)) {
+	    	printk(KERN_ERR "fb%d: unsupported font parameters: width %d, "
+		       "height %d, depth %d, length %d\n", info->node,
+		       map->width, map->height, map->depth, map->length);
+		return;
+	}
+
+	fb += 2;
+	for (c = 0; c < map->length; c++) {
+		for (i = 0; i < map->height; i++) {
+			fb_writeb(font[i], &fb[i * 4]);
+			fb_writeb(font[i], &fb[i * 4 + (128 * 8)]);
+		}
+		fb += 128;
+
+		if ((c % 8) == 7)
+			fb += 128*8;
+
+		font += map->height;
+	}
+}
+
+static struct fb_tile_ops arkfb_tile_ops = {
+	.fb_settile	= arkfb_settile,
+	.fb_tilecopy	= svga_tilecopy,
+	.fb_tilefill    = svga_tilefill,
+	.fb_tileblit    = svga_tileblit,
+	.fb_tilecursor  = svga_tilecursor,
+	.fb_get_tilemax = svga_get_tilemax,
+};
+
+
+/* ------------------------------------------------------------------------- */
+
+
+/* image data is MSB-first, fb structure is MSB-first too */
+static inline u32 expand_color(u32 c)
+{
+	return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF;
+}
+
+/* arkfb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
+static void arkfb_iplan_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	u32 fg = expand_color(image->fg_color);
+	u32 bg = expand_color(image->bg_color);
+	const u8 *src1, *src;
+	u8 __iomem *dst1;
+	u32 __iomem *dst;
+	u32 val;
+	int x, y;
+
+	src1 = image->data;
+	dst1 = info->screen_base + (image->dy * info->fix.line_length)
+		 + ((image->dx / 8) * 4);
+
+	for (y = 0; y < image->height; y++) {
+		src = src1;
+		dst = (u32 __iomem *) dst1;
+		for (x = 0; x < image->width; x += 8) {
+			val = *(src++) * 0x01010101;
+			val = (val & fg) | (~val & bg);
+			fb_writel(val, dst++);
+		}
+		src1 += image->width / 8;
+		dst1 += info->fix.line_length;
+	}
+
+}
+
+/* arkfb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
+static void arkfb_iplan_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+	u32 fg = expand_color(rect->color);
+	u8 __iomem *dst1;
+	u32 __iomem *dst;
+	int x, y;
+
+	dst1 = info->screen_base + (rect->dy * info->fix.line_length)
+		 + ((rect->dx / 8) * 4);
+
+	for (y = 0; y < rect->height; y++) {
+		dst = (u32 __iomem *) dst1;
+		for (x = 0; x < rect->width; x += 8) {
+			fb_writel(fg, dst++);
+		}
+		dst1 += info->fix.line_length;
+	}
+
+}
+
+
+/* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */
+static inline u32 expand_pixel(u32 c)
+{
+	return (((c &  1) << 24) | ((c &  2) << 27) | ((c &  4) << 14) | ((c &   8) << 17) |
+		((c & 16) <<  4) | ((c & 32) <<  7) | ((c & 64) >>  6) | ((c & 128) >>  3)) * 0xF;
+}
+
+/* arkfb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
+static void arkfb_cfb4_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	u32 fg = image->fg_color * 0x11111111;
+	u32 bg = image->bg_color * 0x11111111;
+	const u8 *src1, *src;
+	u8 __iomem *dst1;
+	u32 __iomem *dst;
+	u32 val;
+	int x, y;
+
+	src1 = image->data;
+	dst1 = info->screen_base + (image->dy * info->fix.line_length)
+		 + ((image->dx / 8) * 4);
+
+	for (y = 0; y < image->height; y++) {
+		src = src1;
+		dst = (u32 __iomem *) dst1;
+		for (x = 0; x < image->width; x += 8) {
+			val = expand_pixel(*(src++));
+			val = (val & fg) | (~val & bg);
+			fb_writel(val, dst++);
+		}
+		src1 += image->width / 8;
+		dst1 += info->fix.line_length;
+	}
+
+}
+
+static void arkfb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	if ((info->var.bits_per_pixel == 4) && (image->depth == 1)
+	    && ((image->width % 8) == 0) && ((image->dx % 8) == 0)) {
+		if (info->fix.type == FB_TYPE_INTERLEAVED_PLANES)
+			arkfb_iplan_imageblit(info, image);
+		else
+			arkfb_cfb4_imageblit(info, image);
+	} else
+		cfb_imageblit(info, image);
+}
+
+static void arkfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+	if ((info->var.bits_per_pixel == 4)
+	    && ((rect->width % 8) == 0) && ((rect->dx % 8) == 0)
+	    && (info->fix.type == FB_TYPE_INTERLEAVED_PLANES))
+		arkfb_iplan_fillrect(info, rect);
+	 else
+		cfb_fillrect(info, rect);
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+
+enum
+{
+	DAC_PSEUDO8_8,
+	DAC_RGB1555_8,
+	DAC_RGB0565_8,
+	DAC_RGB0888_8,
+	DAC_RGB8888_8,
+	DAC_PSEUDO8_16,
+	DAC_RGB1555_16,
+	DAC_RGB0565_16,
+	DAC_RGB0888_16,
+	DAC_RGB8888_16,
+	DAC_MAX
+};
+
+struct dac_ops {
+	int (*dac_get_mode)(struct dac_info *info);
+	int (*dac_set_mode)(struct dac_info *info, int mode);
+	int (*dac_get_freq)(struct dac_info *info, int channel);
+	int (*dac_set_freq)(struct dac_info *info, int channel, u32 freq);
+	void (*dac_release)(struct dac_info *info);
+};
+
+typedef void (*dac_read_regs_t)(void *data, u8 *code, int count);
+typedef void (*dac_write_regs_t)(void *data, u8 *code, int count);
+
+struct dac_info
+{
+	struct dac_ops *dacops;
+	dac_read_regs_t dac_read_regs;
+	dac_write_regs_t dac_write_regs;
+	void *data;
+};
+
+
+static inline u8 dac_read_reg(struct dac_info *info, u8 reg)
+{
+	u8 code[2] = {reg, 0};
+	info->dac_read_regs(info->data, code, 1);
+	return code[1];
+}
+
+static inline void dac_read_regs(struct dac_info *info, u8 *code, int count)
+{
+	info->dac_read_regs(info->data, code, count);
+}
+
+static inline void dac_write_reg(struct dac_info *info, u8 reg, u8 val)
+{
+	u8 code[2] = {reg, val};
+	info->dac_write_regs(info->data, code, 1);
+}
+
+static inline void dac_write_regs(struct dac_info *info, u8 *code, int count)
+{
+	info->dac_write_regs(info->data, code, count);
+}
+
+static inline int dac_set_mode(struct dac_info *info, int mode)
+{
+	return info->dacops->dac_set_mode(info, mode);
+}
+
+static inline int dac_set_freq(struct dac_info *info, int channel, u32 freq)
+{
+	return info->dacops->dac_set_freq(info, channel, freq);
+}
+
+static inline void dac_release(struct dac_info *info)
+{
+	info->dacops->dac_release(info);
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+
+/* ICS5342 DAC */
+
+struct ics5342_info
+{
+	struct dac_info dac;
+	u8 mode;
+};
+
+#define DAC_PAR(info) ((struct ics5342_info *) info)
+
+/* LSB is set to distinguish unused slots */
+static const u8 ics5342_mode_table[DAC_MAX] = {
+	[DAC_PSEUDO8_8]  = 0x01, [DAC_RGB1555_8]  = 0x21, [DAC_RGB0565_8]  = 0x61,
+	[DAC_RGB0888_8]  = 0x41, [DAC_PSEUDO8_16] = 0x11, [DAC_RGB1555_16] = 0x31,
+	[DAC_RGB0565_16] = 0x51, [DAC_RGB0888_16] = 0x91, [DAC_RGB8888_16] = 0x71
+};
+
+static int ics5342_set_mode(struct dac_info *info, int mode)
+{
+	u8 code;
+
+	if (mode >= DAC_MAX)
+		return -EINVAL;
+
+	code = ics5342_mode_table[mode];
+
+	if (! code)
+		return -EINVAL;
+
+	dac_write_reg(info, 6, code & 0xF0);
+	DAC_PAR(info)->mode = mode;
+
+	return 0;
+}
+
+static const struct svga_pll ics5342_pll = {3, 129, 3, 33, 0, 3,
+	60000, 250000, 14318};
+
+/* pd4 - allow only posdivider 4 (r=2) */
+static const struct svga_pll ics5342_pll_pd4 = {3, 129, 3, 33, 2, 2,
+	60000, 335000, 14318};
+
+/* 270 MHz should be upper bound for VCO clock according to specs,
+   but that is too restrictive in pd4 case */
+
+static int ics5342_set_freq(struct dac_info *info, int channel, u32 freq)
+{
+	u16 m, n, r;
+
+	/* only postdivider 4 (r=2) is valid in mode DAC_PSEUDO8_16 */
+	int rv = svga_compute_pll((DAC_PAR(info)->mode == DAC_PSEUDO8_16)
+				  ? &ics5342_pll_pd4 : &ics5342_pll,
+				  freq, &m, &n, &r, 0);
+
+	if (rv < 0) {
+		return -EINVAL;
+	} else {
+		u8 code[6] = {4, 3, 5, m-2, 5, (n-2) | (r << 5)};
+		dac_write_regs(info, code, 3);
+		return 0;
+	}
+}
+
+static void ics5342_release(struct dac_info *info)
+{
+	ics5342_set_mode(info, DAC_PSEUDO8_8);
+	kfree(info);
+}
+
+static struct dac_ops ics5342_ops = {
+	.dac_set_mode	= ics5342_set_mode,
+	.dac_set_freq	= ics5342_set_freq,
+	.dac_release	= ics5342_release
+};
+
+
+static struct dac_info * ics5342_init(dac_read_regs_t drr, dac_write_regs_t dwr, void *data)
+{
+	struct dac_info *info = kzalloc(sizeof(struct ics5342_info), GFP_KERNEL);
+
+	if (! info)
+		return NULL;
+
+	info->dacops = &ics5342_ops;
+	info->dac_read_regs = drr;
+	info->dac_write_regs = dwr;
+	info->data = data;
+	DAC_PAR(info)->mode = DAC_PSEUDO8_8; /* estimation */
+	return info;
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+
+static unsigned short dac_regs[4] = {0x3c8, 0x3c9, 0x3c6, 0x3c7};
+
+static void ark_dac_read_regs(void *data, u8 *code, int count)
+{
+	u8 regval = vga_rseq(NULL, 0x1C);
+
+	while (count != 0)
+	{
+		vga_wseq(NULL, 0x1C, regval | (code[0] & 4) ? 0x80 : 0);
+		code[1] = vga_r(NULL, dac_regs[code[0] & 3]);
+		count--;
+		code += 2;
+	}
+
+	vga_wseq(NULL, 0x1C, regval);
+}
+
+static void ark_dac_write_regs(void *data, u8 *code, int count)
+{
+	u8 regval = vga_rseq(NULL, 0x1C);
+
+	while (count != 0)
+	{
+		vga_wseq(NULL, 0x1C, regval | (code[0] & 4) ? 0x80 : 0);
+		vga_w(NULL, dac_regs[code[0] & 3], code[1]);
+		count--;
+		code += 2;
+	}
+
+	vga_wseq(NULL, 0x1C, regval);
+}
+
+
+static void ark_set_pixclock(struct fb_info *info, u32 pixclock)
+{
+	struct arkfb_info *par = info->par;
+	u8 regval;
+
+	int rv = dac_set_freq(par->dac, 0, 1000000000 / pixclock);
+	if (rv < 0) {
+		printk(KERN_ERR "fb%d: cannot set requested pixclock, keeping old value\n", info->node);
+		return;
+	}
+
+	/* Set VGA misc register  */
+	regval = vga_r(NULL, VGA_MIS_R);
+	vga_w(NULL, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);
+}
+
+
+/* Open framebuffer */
+
+static int arkfb_open(struct fb_info *info, int user)
+{
+	struct arkfb_info *par = info->par;
+
+	mutex_lock(&(par->open_lock));
+	if (par->ref_count == 0) {
+		memset(&(par->state), 0, sizeof(struct vgastate));
+		par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP;
+		par->state.num_crtc = 0x60;
+		par->state.num_seq = 0x30;
+		save_vga(&(par->state));
+	}
+
+	par->ref_count++;
+	mutex_unlock(&(par->open_lock));
+
+	return 0;
+}
+
+/* Close framebuffer */
+
+static int arkfb_release(struct fb_info *info, int user)
+{
+	struct arkfb_info *par = info->par;
+
+	mutex_lock(&(par->open_lock));
+	if (par->ref_count == 0) {
+		mutex_unlock(&(par->open_lock));
+		return -EINVAL;
+	}
+
+	if (par->ref_count == 1) {
+		restore_vga(&(par->state));
+		dac_set_mode(par->dac, DAC_PSEUDO8_8);
+	}
+
+	par->ref_count--;
+	mutex_unlock(&(par->open_lock));
+
+	return 0;
+}
+
+/* Validate passed in var */
+
+static int arkfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	int rv, mem, step;
+
+	/* Find appropriate format */
+	rv = svga_match_format (arkfb_formats, var, NULL);
+	if (rv < 0)
+	{
+		printk(KERN_ERR "fb%d: unsupported mode requested\n", info->node);
+		return rv;
+	}
+
+	/* Do not allow to have real resoulution larger than virtual */
+	if (var->xres > var->xres_virtual)
+		var->xres_virtual = var->xres;
+
+	if (var->yres > var->yres_virtual)
+		var->yres_virtual = var->yres;
+
+	/* Round up xres_virtual to have proper alignment of lines */
+	step = arkfb_formats[rv].xresstep - 1;
+	var->xres_virtual = (var->xres_virtual+step) & ~step;
+
+
+	/* Check whether have enough memory */
+	mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual;
+	if (mem > info->screen_size)
+	{
+		printk(KERN_ERR "fb%d: not enough framebuffer memory (%d kB requested , %d kB available)\n", info->node, mem >> 10, (unsigned int) (info->screen_size >> 10));
+		return -EINVAL;
+	}
+
+	rv = svga_check_timings (&ark_timing_regs, var, info->node);
+	if (rv < 0)
+	{
+		printk(KERN_ERR "fb%d: invalid timings requested\n", info->node);
+		return rv;
+	}
+
+	/* Interlaced mode is broken */
+	if (var->vmode & FB_VMODE_INTERLACED)
+		return -EINVAL;
+
+	return 0;
+}
+
+/* Set video mode from par */
+
+static int arkfb_set_par(struct fb_info *info)
+{
+	struct arkfb_info *par = info->par;
+	u32 value, mode, hmul, hdiv, offset_value, screen_size;
+	u32 bpp = info->var.bits_per_pixel;
+	u8 regval;
+
+	if (bpp != 0) {
+		info->fix.ypanstep = 1;
+		info->fix.line_length = (info->var.xres_virtual * bpp) / 8;
+
+		info->flags &= ~FBINFO_MISC_TILEBLITTING;
+		info->tileops = NULL;
+
+		/* in 4bpp supports 8p wide tiles only, any tiles otherwise */
+		info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
+		info->pixmap.blit_y = ~(u32)0;
+
+		offset_value = (info->var.xres_virtual * bpp) / 64;
+		screen_size = info->var.yres_virtual * info->fix.line_length;
+	} else {
+		info->fix.ypanstep = 16;
+		info->fix.line_length = 0;
+
+		info->flags |= FBINFO_MISC_TILEBLITTING;
+		info->tileops = &arkfb_tile_ops;
+
+		/* supports 8x16 tiles only */
+		info->pixmap.blit_x = 1 << (8 - 1);
+		info->pixmap.blit_y = 1 << (16 - 1);
+
+		offset_value = info->var.xres_virtual / 16;
+		screen_size = (info->var.xres_virtual * info->var.yres_virtual) / 64;
+	}
+
+	info->var.xoffset = 0;
+	info->var.yoffset = 0;
+	info->var.activate = FB_ACTIVATE_NOW;
+
+	/* Unlock registers */
+	svga_wcrt_mask(0x11, 0x00, 0x80);
+
+	/* Blank screen and turn off sync */
+	svga_wseq_mask(0x01, 0x20, 0x20);
+	svga_wcrt_mask(0x17, 0x00, 0x80);
+
+	/* Set default values */
+	svga_set_default_gfx_regs();
+	svga_set_default_atc_regs();
+	svga_set_default_seq_regs();
+	svga_set_default_crt_regs();
+	svga_wcrt_multi(ark_line_compare_regs, 0xFFFFFFFF);
+	svga_wcrt_multi(ark_start_address_regs, 0);
+
+	/* ARK specific initialization */
+	svga_wseq_mask(0x10, 0x1F, 0x1F); /* enable linear framebuffer and full memory access */
+	svga_wseq_mask(0x12, 0x03, 0x03); /* 4 MB linear framebuffer size */
+
+	vga_wseq(NULL, 0x13, info->fix.smem_start >> 16);
+	vga_wseq(NULL, 0x14, info->fix.smem_start >> 24);
+	vga_wseq(NULL, 0x15, 0);
+	vga_wseq(NULL, 0x16, 0);
+
+	/* Set the FIFO threshold register */
+	/* It is fascinating way to store 5-bit value in 8-bit register */
+	regval = 0x10 | ((threshold & 0x0E) >> 1) | (threshold & 0x01) << 7 | (threshold & 0x10) << 1;
+	vga_wseq(NULL, 0x18, regval);
+
+	/* Set the offset register */
+	pr_debug("fb%d: offset register       : %d\n", info->node, offset_value);
+	svga_wcrt_multi(ark_offset_regs, offset_value);
+
+	/* fix for hi-res textmode */
+	svga_wcrt_mask(0x40, 0x08, 0x08);
+
+	if (info->var.vmode & FB_VMODE_DOUBLE)
+		svga_wcrt_mask(0x09, 0x80, 0x80);
+	else
+		svga_wcrt_mask(0x09, 0x00, 0x80);
+
+	if (info->var.vmode & FB_VMODE_INTERLACED)
+		svga_wcrt_mask(0x44, 0x04, 0x04);
+	else
+		svga_wcrt_mask(0x44, 0x00, 0x04);
+
+	hmul = 1;
+	hdiv = 1;
+	mode = svga_match_format(arkfb_formats, &(info->var), &(info->fix));
+
+	/* Set mode-specific register values */
+	switch (mode) {
+	case 0:
+		pr_debug("fb%d: text mode\n", info->node);
+		svga_set_textmode_vga_regs();
+
+		vga_wseq(NULL, 0x11, 0x10); /* basic VGA mode */
+		svga_wcrt_mask(0x46, 0x00, 0x04); /* 8bit pixel path */
+		dac_set_mode(par->dac, DAC_PSEUDO8_8);
+
+		break;
+	case 1:
+		pr_debug("fb%d: 4 bit pseudocolor\n", info->node);
+		vga_wgfx(NULL, VGA_GFX_MODE, 0x40);
+
+		vga_wseq(NULL, 0x11, 0x10); /* basic VGA mode */
+		svga_wcrt_mask(0x46, 0x00, 0x04); /* 8bit pixel path */
+		dac_set_mode(par->dac, DAC_PSEUDO8_8);
+		break;
+	case 2:
+		pr_debug("fb%d: 4 bit pseudocolor, planar\n", info->node);
+
+		vga_wseq(NULL, 0x11, 0x10); /* basic VGA mode */
+		svga_wcrt_mask(0x46, 0x00, 0x04); /* 8bit pixel path */
+		dac_set_mode(par->dac, DAC_PSEUDO8_8);
+		break;
+	case 3:
+		pr_debug("fb%d: 8 bit pseudocolor\n", info->node);
+
+		vga_wseq(NULL, 0x11, 0x16); /* 8bpp accel mode */
+
+		if (info->var.pixclock > 20000) {
+			pr_debug("fb%d: not using multiplex\n", info->node);
+			svga_wcrt_mask(0x46, 0x00, 0x04); /* 8bit pixel path */
+			dac_set_mode(par->dac, DAC_PSEUDO8_8);
+		} else {
+			pr_debug("fb%d: using multiplex\n", info->node);
+			svga_wcrt_mask(0x46, 0x04, 0x04); /* 16bit pixel path */
+			dac_set_mode(par->dac, DAC_PSEUDO8_16);
+			hdiv = 2;
+		}
+		break;
+	case 4:
+		pr_debug("fb%d: 5/5/5 truecolor\n", info->node);
+
+		vga_wseq(NULL, 0x11, 0x1A); /* 16bpp accel mode */
+		svga_wcrt_mask(0x46, 0x04, 0x04); /* 16bit pixel path */
+		dac_set_mode(par->dac, DAC_RGB1555_16);
+		break;
+	case 5:
+		pr_debug("fb%d: 5/6/5 truecolor\n", info->node);
+
+		vga_wseq(NULL, 0x11, 0x1A); /* 16bpp accel mode */
+		svga_wcrt_mask(0x46, 0x04, 0x04); /* 16bit pixel path */
+		dac_set_mode(par->dac, DAC_RGB0565_16);
+		break;
+	case 6:
+		pr_debug("fb%d: 8/8/8 truecolor\n", info->node);
+
+		vga_wseq(NULL, 0x11, 0x16); /* 8bpp accel mode ??? */
+		svga_wcrt_mask(0x46, 0x04, 0x04); /* 16bit pixel path */
+		dac_set_mode(par->dac, DAC_RGB0888_16);
+		hmul = 3;
+		hdiv = 2;
+		break;
+	case 7:
+		pr_debug("fb%d: 8/8/8/8 truecolor\n", info->node);
+
+		vga_wseq(NULL, 0x11, 0x1E); /* 32bpp accel mode */
+		svga_wcrt_mask(0x46, 0x04, 0x04); /* 16bit pixel path */
+		dac_set_mode(par->dac, DAC_RGB8888_16);
+		hmul = 2;
+		break;
+	default:
+		printk(KERN_ERR "fb%d: unsupported mode - bug\n", info->node);
+		return -EINVAL;
+	}
+
+	ark_set_pixclock(info, (hdiv * info->var.pixclock) / hmul);
+	svga_set_timings(&ark_timing_regs, &(info->var), hmul, hdiv,
+			 (info->var.vmode & FB_VMODE_DOUBLE)     ? 2 : 1,
+			 (info->var.vmode & FB_VMODE_INTERLACED) ? 2 : 1,
+			  hmul, info->node);
+
+	/* Set interlaced mode start/end register */
+	value = info->var.xres + info->var.left_margin + info->var.right_margin + info->var.hsync_len;
+	value = ((value * hmul / hdiv) / 8) - 5;
+	vga_wcrt(NULL, 0x42, (value + 1) / 2);
+
+	memset_io(info->screen_base, 0x00, screen_size);
+	/* Device and screen back on */
+	svga_wcrt_mask(0x17, 0x80, 0x80);
+	svga_wseq_mask(0x01, 0x00, 0x20);
+
+	return 0;
+}
+
+/* Set a colour register */
+
+static int arkfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+				u_int transp, struct fb_info *fb)
+{
+	switch (fb->var.bits_per_pixel) {
+	case 0:
+	case 4:
+		if (regno >= 16)
+			return -EINVAL;
+
+		if ((fb->var.bits_per_pixel == 4) &&
+		    (fb->var.nonstd == 0)) {
+			outb(0xF0, VGA_PEL_MSK);
+			outb(regno*16, VGA_PEL_IW);
+		} else {
+			outb(0x0F, VGA_PEL_MSK);
+			outb(regno, VGA_PEL_IW);
+		}
+		outb(red >> 10, VGA_PEL_D);
+		outb(green >> 10, VGA_PEL_D);
+		outb(blue >> 10, VGA_PEL_D);
+		break;
+	case 8:
+		if (regno >= 256)
+			return -EINVAL;
+
+		outb(0xFF, VGA_PEL_MSK);
+		outb(regno, VGA_PEL_IW);
+		outb(red >> 10, VGA_PEL_D);
+		outb(green >> 10, VGA_PEL_D);
+		outb(blue >> 10, VGA_PEL_D);
+		break;
+	case 16:
+		if (regno >= 16)
+			return 0;
+
+		if (fb->var.green.length == 5)
+			((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) |
+				((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11);
+		else if (fb->var.green.length == 6)
+			((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) |
+				((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11);
+		else
+			return -EINVAL;
+		break;
+	case 24:
+	case 32:
+		if (regno >= 16)
+			return 0;
+
+		((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
+			(green & 0xFF00) | ((blue & 0xFF00) >> 8);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* Set the display blanking state */
+
+static int arkfb_blank(int blank_mode, struct fb_info *info)
+{
+	switch (blank_mode) {
+	case FB_BLANK_UNBLANK:
+		pr_debug("fb%d: unblank\n", info->node);
+		svga_wseq_mask(0x01, 0x00, 0x20);
+		svga_wcrt_mask(0x17, 0x80, 0x80);
+		break;
+	case FB_BLANK_NORMAL:
+		pr_debug("fb%d: blank\n", info->node);
+		svga_wseq_mask(0x01, 0x20, 0x20);
+		svga_wcrt_mask(0x17, 0x80, 0x80);
+		break;
+	case FB_BLANK_POWERDOWN:
+	case FB_BLANK_HSYNC_SUSPEND:
+	case FB_BLANK_VSYNC_SUSPEND:
+		pr_debug("fb%d: sync down\n", info->node);
+		svga_wseq_mask(0x01, 0x20, 0x20);
+		svga_wcrt_mask(0x17, 0x00, 0x80);
+		break;
+	}
+	return 0;
+}
+
+
+/* Pan the display */
+
+static int arkfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	unsigned int offset;
+
+	/* Calculate the offset */
+	if (var->bits_per_pixel == 0) {
+		offset = (var->yoffset / 16) * (var->xres_virtual / 2) + (var->xoffset / 2);
+		offset = offset >> 2;
+	} else {
+		offset = (var->yoffset * info->fix.line_length) +
+			 (var->xoffset * var->bits_per_pixel / 8);
+		offset = offset >> ((var->bits_per_pixel == 4) ? 2 : 3);
+	}
+
+	/* Set the offset */
+	svga_wcrt_multi(ark_start_address_regs, offset);
+
+	return 0;
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+
+/* Frame buffer operations */
+
+static struct fb_ops arkfb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_open	= arkfb_open,
+	.fb_release	= arkfb_release,
+	.fb_check_var	= arkfb_check_var,
+	.fb_set_par	= arkfb_set_par,
+	.fb_setcolreg	= arkfb_setcolreg,
+	.fb_blank	= arkfb_blank,
+	.fb_pan_display	= arkfb_pan_display,
+	.fb_fillrect	= arkfb_fillrect,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_imageblit	= arkfb_imageblit,
+	.fb_get_caps    = svga_get_caps,
+};
+
+
+/* ------------------------------------------------------------------------- */
+
+
+/* PCI probe */
+static int __devinit ark_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct fb_info *info;
+	struct arkfb_info *par;
+	int rc;
+	u8 regval;
+
+	/* Ignore secondary VGA device because there is no VGA arbitration */
+	if (! svga_primary_device(dev)) {
+		dev_info(&(dev->dev), "ignoring secondary device\n");
+		return -ENODEV;
+	}
+
+	/* Allocate and fill driver data structure */
+	info = framebuffer_alloc(sizeof(struct arkfb_info), NULL);
+	if (! info) {
+		dev_err(&(dev->dev), "cannot allocate memory\n");
+		return -ENOMEM;
+	}
+
+	par = info->par;
+	mutex_init(&par->open_lock);
+
+	info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN;
+	info->fbops = &arkfb_ops;
+
+	/* Prepare PCI device */
+	rc = pci_enable_device(dev);
+	if (rc < 0) {
+		dev_err(&(dev->dev), "cannot enable PCI device\n");
+		goto err_enable_device;
+	}
+
+	rc = pci_request_regions(dev, "arkfb");
+	if (rc < 0) {
+		dev_err(&(dev->dev), "cannot reserve framebuffer region\n");
+		goto err_request_regions;
+	}
+
+	par->dac = ics5342_init(ark_dac_read_regs, ark_dac_write_regs, info);
+	if (! par->dac) {
+		rc = -ENOMEM;
+		dev_err(&(dev->dev), "RAMDAC initialization failed\n");
+		goto err_dac;
+	}
+
+	info->fix.smem_start = pci_resource_start(dev, 0);
+	info->fix.smem_len = pci_resource_len(dev, 0);
+
+	/* Map physical IO memory address into kernel space */
+	info->screen_base = pci_iomap(dev, 0, 0);
+	if (! info->screen_base) {
+		rc = -ENOMEM;
+		dev_err(&(dev->dev), "iomap for framebuffer failed\n");
+		goto err_iomap;
+	}
+
+	/* FIXME get memsize */
+	regval = vga_rseq(NULL, 0x10);
+	info->screen_size = (1 << (regval >> 6)) << 20;
+	info->fix.smem_len = info->screen_size;
+
+	strcpy(info->fix.id, "ARK 2000PV");
+	info->fix.mmio_start = 0;
+	info->fix.mmio_len = 0;
+	info->fix.type = FB_TYPE_PACKED_PIXELS;
+	info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+	info->fix.ypanstep = 0;
+	info->fix.accel = FB_ACCEL_NONE;
+	info->pseudo_palette = (void*) (par->pseudo_palette);
+
+	/* Prepare startup mode */
+	rc = fb_find_mode(&(info->var), info, mode, NULL, 0, NULL, 8);
+	if (! ((rc == 1) || (rc == 2))) {
+		rc = -EINVAL;
+		dev_err(&(dev->dev), "mode %s not found\n", mode);
+		goto err_find_mode;
+	}
+
+	rc = fb_alloc_cmap(&info->cmap, 256, 0);
+	if (rc < 0) {
+		dev_err(&(dev->dev), "cannot allocate colormap\n");
+		goto err_alloc_cmap;
+	}
+
+	rc = register_framebuffer(info);
+	if (rc < 0) {
+		dev_err(&(dev->dev), "cannot register framebugger\n");
+		goto err_reg_fb;
+	}
+
+	printk(KERN_INFO "fb%d: %s on %s, %d MB RAM\n", info->node, info->fix.id,
+		 pci_name(dev), info->fix.smem_len >> 20);
+
+	/* Record a reference to the driver data */
+	pci_set_drvdata(dev, info);
+
+#ifdef CONFIG_MTRR
+	if (mtrr) {
+		par->mtrr_reg = -1;
+		par->mtrr_reg = mtrr_add(info->fix.smem_start, info->fix.smem_len, MTRR_TYPE_WRCOMB, 1);
+	}
+#endif
+
+	return 0;
+
+	/* Error handling */
+err_reg_fb:
+	fb_dealloc_cmap(&info->cmap);
+err_alloc_cmap:
+err_find_mode:
+	pci_iounmap(dev, info->screen_base);
+err_iomap:
+	dac_release(par->dac);
+err_dac:
+	pci_release_regions(dev);
+err_request_regions:
+/*	pci_disable_device(dev); */
+err_enable_device:
+	framebuffer_release(info);
+	return rc;
+}
+
+/* PCI remove */
+
+static void __devexit ark_pci_remove(struct pci_dev *dev)
+{
+	struct fb_info *info = pci_get_drvdata(dev);
+	struct arkfb_info *par = info->par;
+
+	if (info) {
+#ifdef CONFIG_MTRR
+		if (par->mtrr_reg >= 0) {
+			mtrr_del(par->mtrr_reg, 0, 0);
+			par->mtrr_reg = -1;
+		}
+#endif
+
+		dac_release(par->dac);
+		unregister_framebuffer(info);
+		fb_dealloc_cmap(&info->cmap);
+
+		pci_iounmap(dev, info->screen_base);
+		pci_release_regions(dev);
+/*		pci_disable_device(dev); */
+
+		pci_set_drvdata(dev, NULL);
+		framebuffer_release(info);
+	}
+}
+
+
+#ifdef CONFIG_PM
+/* PCI suspend */
+
+static int ark_pci_suspend (struct pci_dev* dev, pm_message_t state)
+{
+	struct fb_info *info = pci_get_drvdata(dev);
+	struct arkfb_info *par = info->par;
+
+	dev_info(&(dev->dev), "suspend\n");
+
+	acquire_console_sem();
+	mutex_lock(&(par->open_lock));
+
+	if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
+		mutex_unlock(&(par->open_lock));
+		release_console_sem();
+		return 0;
+	}
+
+	fb_set_suspend(info, 1);
+
+	pci_save_state(dev);
+	pci_disable_device(dev);
+	pci_set_power_state(dev, pci_choose_state(dev, state));
+
+	mutex_unlock(&(par->open_lock));
+	release_console_sem();
+
+	return 0;
+}
+
+
+/* PCI resume */
+
+static int ark_pci_resume (struct pci_dev* dev)
+{
+	struct fb_info *info = pci_get_drvdata(dev);
+	struct arkfb_info *par = info->par;
+
+	dev_info(&(dev->dev), "resume\n");
+
+	acquire_console_sem();
+	mutex_lock(&(par->open_lock));
+
+	if (par->ref_count == 0) {
+		mutex_unlock(&(par->open_lock));
+		release_console_sem();
+		return 0;
+	}
+
+	pci_set_power_state(dev, PCI_D0);
+	pci_restore_state(dev);
+
+	if (pci_enable_device(dev))
+		goto fail;
+
+	pci_set_master(dev);
+
+	arkfb_set_par(info);
+	fb_set_suspend(info, 0);
+
+	mutex_unlock(&(par->open_lock));
+fail:
+	release_console_sem();
+	return 0;
+}
+#else
+#define ark_pci_suspend NULL
+#define ark_pci_resume NULL
+#endif /* CONFIG_PM */
+
+/* List of boards that we are trying to support */
+
+static struct pci_device_id ark_devices[] __devinitdata = {
+	{PCI_DEVICE(0xEDD8, 0xA099)},
+	{0, 0, 0, 0, 0, 0, 0}
+};
+
+
+MODULE_DEVICE_TABLE(pci, ark_devices);
+
+static struct pci_driver arkfb_pci_driver = {
+	.name		= "arkfb",
+	.id_table	= ark_devices,
+	.probe		= ark_pci_probe,
+	.remove		= __devexit_p(ark_pci_remove),
+	.suspend	= ark_pci_suspend,
+	.resume		= ark_pci_resume,
+};
+
+/* Cleanup */
+
+static void __exit arkfb_cleanup(void)
+{
+	pr_debug("arkfb: cleaning up\n");
+	pci_unregister_driver(&arkfb_pci_driver);
+}
+
+/* Driver Initialisation */
+
+static int __init arkfb_init(void)
+{
+
+#ifndef MODULE
+	char *option = NULL;
+
+	if (fb_get_options("arkfb", &option))
+		return -ENODEV;
+
+	if (option && *option)
+		mode = option;
+#endif
+
+	pr_debug("arkfb: initializing\n");
+	return pci_register_driver(&arkfb_pci_driver);
+}
+
+module_init(arkfb_init);
+module_exit(arkfb_cleanup);
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 08d4e11..38c2e25 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1236,6 +1236,10 @@
 	pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
 #elif defined(__arm__) || defined(__sh__) || defined(__m32r__)
 	vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
+#elif defined(__avr32__)
+	vma->vm_page_prot = __pgprot((pgprot_val(vma->vm_page_prot)
+				      & ~_PAGE_CACHABLE)
+				     | (_PAGE_BUFFER | _PAGE_DIRTY));
 #elif defined(__ia64__)
 	if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start))
 		vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
diff --git a/drivers/video/nvidia/nv_hw.c b/drivers/video/nvidia/nv_hw.c
index f297c7b..c627955 100644
--- a/drivers/video/nvidia/nv_hw.c
+++ b/drivers/video/nvidia/nv_hw.c
@@ -149,8 +149,7 @@
 		pll = NV_RD32(par->PMC, 0x4024);
 		M = pll & 0xFF;
 		N = (pll >> 8) & 0xFF;
-		if (((par->Chipset & 0xfff0) == 0x0290) ||
-				((par->Chipset & 0xfff0) == 0x0390)) {
+		if (((par->Chipset & 0xfff0) == 0x0290) || ((par->Chipset & 0xfff0) == 0x0390) || ((par->Chipset & 0xfff0) == 0x02E0)) {
 			MB = 1;
 			NB = 1;
 		} else {
@@ -963,6 +962,7 @@
 
 		if (((par->Chipset & 0xfff0) == 0x0090) ||
 		    ((par->Chipset & 0xfff0) == 0x01D0) ||
+		    ((par->Chipset & 0xfff0) == 0x02E0) ||
 		    ((par->Chipset & 0xfff0) == 0x0290))
 			regions = 15;
 		for(i = 0; i < regions; i++) {
@@ -1275,6 +1275,7 @@
 						0x00100000);
 					break;
 				case 0x0090:
+				case 0x02E0:
 				case 0x0290:
 					NV_WR32(par->PRAMDAC, 0x0608,
 						NV_RD32(par->PRAMDAC, 0x0608) |
@@ -1352,6 +1353,7 @@
 			} else {
 				if (((par->Chipset & 0xfff0) == 0x0090) ||
 				    ((par->Chipset & 0xfff0) == 0x01D0) ||
+				    ((par->Chipset & 0xfff0) == 0x02E0) ||
 				    ((par->Chipset & 0xfff0) == 0x0290)) {
 					for (i = 0; i < 60; i++) {
 						NV_WR32(par->PGRAPH,
@@ -1403,6 +1405,7 @@
 				} else {
 					if ((par->Chipset & 0xfff0) == 0x0090 ||
 					    (par->Chipset & 0xfff0) == 0x01D0 ||
+					    (par->Chipset & 0xfff0) == 0x02E0 ||
 					    (par->Chipset & 0xfff0) == 0x0290) {
 						NV_WR32(par->PGRAPH, 0x0DF0,
 							NV_RD32(par->PFB, 0x0200));
diff --git a/drivers/video/nvidia/nvidia.c b/drivers/video/nvidia/nvidia.c
index 7c36b5f..f85edf0 100644
--- a/drivers/video/nvidia/nvidia.c
+++ b/drivers/video/nvidia/nvidia.c
@@ -1243,6 +1243,7 @@
 	case 0x0140:		/* GeForce 6600 */
 	case 0x0160:		/* GeForce 6200 */
 	case 0x01D0:		/* GeForce 7200, 7300, 7400 */
+	case 0x02E0:		/* GeForce 7300 GT */
 	case 0x0090:		/* GeForce 7800 */
 	case 0x0210:		/* GeForce 6800 */
 	case 0x0220:		/* GeForce 6200 */
diff --git a/drivers/video/s3fb.c b/drivers/video/s3fb.c
index 756fafb..d117358 100644
--- a/drivers/video/s3fb.c
+++ b/drivers/video/s3fb.c
@@ -796,23 +796,6 @@
 	return 0;
 }
 
-/* Get capabilities of accelerator based on the mode */
-
-static void s3fb_get_caps(struct fb_info *info, struct fb_blit_caps *caps,
-			  struct fb_var_screeninfo *var)
-{
-	if (var->bits_per_pixel == 0) {
-		/* can only support 256 8x16 bitmap */
-		caps->x = 1 << (8 - 1);
-		caps->y = 1 << (16 - 1);
-		caps->len = 256;
-	} else {
-		caps->x = ~(u32)0;
-		caps->y = ~(u32)0;
-		caps->len = ~(u32)0;
-	}
-}
-
 /* ------------------------------------------------------------------------- */
 
 /* Frame buffer operations */
@@ -829,7 +812,7 @@
 	.fb_fillrect	= s3fb_fillrect,
 	.fb_copyarea	= cfb_copyarea,
 	.fb_imageblit	= s3fb_imageblit,
-	.fb_get_caps    = s3fb_get_caps,
+	.fb_get_caps    = svga_get_caps,
 };
 
 /* ------------------------------------------------------------------------- */
diff --git a/drivers/video/svgalib.c b/drivers/video/svgalib.c
index 079cdc9..25df928 100644
--- a/drivers/video/svgalib.c
+++ b/drivers/video/svgalib.c
@@ -347,6 +347,23 @@
 	return 256;
 }
 
+/* Get capabilities of accelerator based on the mode */
+
+void svga_get_caps(struct fb_info *info, struct fb_blit_caps *caps,
+		   struct fb_var_screeninfo *var)
+{
+	if (var->bits_per_pixel == 0) {
+		/* can only support 256 8x16 bitmap */
+		caps->x = 1 << (8 - 1);
+		caps->y = 1 << (16 - 1);
+		caps->len = 256;
+	} else {
+		caps->x = (var->bits_per_pixel == 4) ? 1 << (8 - 1) : ~(u32)0;
+		caps->y = ~(u32)0;
+		caps->len = ~(u32)0;
+	}
+}
+EXPORT_SYMBOL(svga_get_caps);
 
 /* ------------------------------------------------------------------------- */
 
diff --git a/drivers/video/vt8623fb.c b/drivers/video/vt8623fb.c
new file mode 100644
index 0000000..5e9755e
--- /dev/null
+++ b/drivers/video/vt8623fb.c
@@ -0,0 +1,927 @@
+/*
+ * linux/drivers/video/vt8623fb.c - fbdev driver for
+ * integrated graphic core in VIA VT8623 [CLE266] chipset
+ *
+ * Copyright (c) 2006-2007 Ondrej Zajicek <santiago@crfreenet.org>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ * Code is based on s3fb, some parts are from David Boucher's viafb
+ * (http://davesdomain.org.uk/viafb/)
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/svga.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/console.h> /* Why should fb driver call console functions? because acquire_console_sem() */
+#include <video/vga.h>
+
+#ifdef CONFIG_MTRR
+#include <asm/mtrr.h>
+#endif
+
+struct vt8623fb_info {
+	char __iomem *mmio_base;
+	int mtrr_reg;
+	struct vgastate state;
+	struct mutex open_lock;
+	unsigned int ref_count;
+	u32 pseudo_palette[16];
+};
+
+
+
+/* ------------------------------------------------------------------------- */
+
+static const struct svga_fb_format vt8623fb_formats[] = {
+	{ 0,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
+		FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP8,	FB_VISUAL_PSEUDOCOLOR, 16, 16},
+	{ 4,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
+		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_PSEUDOCOLOR, 16, 16},
+	{ 4,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 1,
+		FB_TYPE_INTERLEAVED_PLANES, 1,		FB_VISUAL_PSEUDOCOLOR, 16, 16},
+	{ 8,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
+		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_PSEUDOCOLOR, 8, 8},
+/*	{16,  {10, 5, 0}, {5, 5, 0},  {0, 5, 0}, {0, 0, 0}, 0,
+		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_TRUECOLOR, 4, 4},	*/
+	{16,  {11, 5, 0}, {5, 6, 0},  {0, 5, 0}, {0, 0, 0}, 0,
+		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_TRUECOLOR, 4, 4},
+	{32,  {16, 8, 0}, {8, 8, 0},  {0, 8, 0}, {0, 0, 0}, 0,
+		FB_TYPE_PACKED_PIXELS, 0,		FB_VISUAL_TRUECOLOR, 2, 2},
+	SVGA_FORMAT_END
+};
+
+static const struct svga_pll vt8623_pll = {2, 127, 2, 7, 0, 3,
+	60000, 300000, 14318};
+
+/* CRT timing register sets */
+
+struct vga_regset vt8623_h_total_regs[]       = {{0x00, 0, 7}, {0x36, 3, 3}, VGA_REGSET_END};
+struct vga_regset vt8623_h_display_regs[]     = {{0x01, 0, 7}, VGA_REGSET_END};
+struct vga_regset vt8623_h_blank_start_regs[] = {{0x02, 0, 7}, VGA_REGSET_END};
+struct vga_regset vt8623_h_blank_end_regs[]   = {{0x03, 0, 4}, {0x05, 7, 7}, {0x33, 5, 5}, VGA_REGSET_END};
+struct vga_regset vt8623_h_sync_start_regs[]  = {{0x04, 0, 7}, {0x33, 4, 4}, VGA_REGSET_END};
+struct vga_regset vt8623_h_sync_end_regs[]    = {{0x05, 0, 4}, VGA_REGSET_END};
+
+struct vga_regset vt8623_v_total_regs[]       = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x35, 0, 0}, VGA_REGSET_END};
+struct vga_regset vt8623_v_display_regs[]     = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x35, 2, 2}, VGA_REGSET_END};
+struct vga_regset vt8623_v_blank_start_regs[] = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x35, 3, 3}, VGA_REGSET_END};
+struct vga_regset vt8623_v_blank_end_regs[]   = {{0x16, 0, 7}, VGA_REGSET_END};
+struct vga_regset vt8623_v_sync_start_regs[]  = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x35, 1, 1}, VGA_REGSET_END};
+struct vga_regset vt8623_v_sync_end_regs[]    = {{0x11, 0, 3}, VGA_REGSET_END};
+
+struct vga_regset vt8623_offset_regs[]        = {{0x13, 0, 7}, {0x35, 5, 7}, VGA_REGSET_END};
+struct vga_regset vt8623_line_compare_regs[]  = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, {0x33, 0, 2}, {0x35, 4, 4}, VGA_REGSET_END};
+struct vga_regset vt8623_fetch_count_regs[]   = {{0x1C, 0, 7}, {0x1D, 0, 1}, VGA_REGSET_END};
+struct vga_regset vt8623_start_address_regs[] = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x34, 0, 7}, {0x48, 0, 1}, VGA_REGSET_END};
+
+struct svga_timing_regs vt8623_timing_regs     = {
+	vt8623_h_total_regs, vt8623_h_display_regs, vt8623_h_blank_start_regs,
+	vt8623_h_blank_end_regs, vt8623_h_sync_start_regs, vt8623_h_sync_end_regs,
+	vt8623_v_total_regs, vt8623_v_display_regs, vt8623_v_blank_start_regs,
+	vt8623_v_blank_end_regs, vt8623_v_sync_start_regs, vt8623_v_sync_end_regs,
+};
+
+
+/* ------------------------------------------------------------------------- */
+
+
+/* Module parameters */
+
+static char *mode = "640x480-8@60";
+
+#ifdef CONFIG_MTRR
+static int mtrr = 1;
+#endif
+
+MODULE_AUTHOR("(c) 2006 Ondrej Zajicek <santiago@crfreenet.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("fbdev driver for integrated graphics core in VIA VT8623 [CLE266]");
+
+module_param(mode, charp, 0644);
+MODULE_PARM_DESC(mode, "Default video mode ('640x480-8@60', etc)");
+
+#ifdef CONFIG_MTRR
+module_param(mtrr, int, 0444);
+MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
+#endif
+
+
+/* ------------------------------------------------------------------------- */
+
+
+static struct fb_tile_ops vt8623fb_tile_ops = {
+	.fb_settile	= svga_settile,
+	.fb_tilecopy	= svga_tilecopy,
+	.fb_tilefill    = svga_tilefill,
+	.fb_tileblit    = svga_tileblit,
+	.fb_tilecursor  = svga_tilecursor,
+	.fb_get_tilemax = svga_get_tilemax,
+};
+
+
+/* ------------------------------------------------------------------------- */
+
+
+/* image data is MSB-first, fb structure is MSB-first too */
+static inline u32 expand_color(u32 c)
+{
+	return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF;
+}
+
+/* vt8623fb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
+static void vt8623fb_iplan_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	u32 fg = expand_color(image->fg_color);
+	u32 bg = expand_color(image->bg_color);
+	const u8 *src1, *src;
+	u8 __iomem *dst1;
+	u32 __iomem *dst;
+	u32 val;
+	int x, y;
+
+	src1 = image->data;
+	dst1 = info->screen_base + (image->dy * info->fix.line_length)
+		 + ((image->dx / 8) * 4);
+
+	for (y = 0; y < image->height; y++) {
+		src = src1;
+		dst = (u32 __iomem *) dst1;
+		for (x = 0; x < image->width; x += 8) {
+			val = *(src++) * 0x01010101;
+			val = (val & fg) | (~val & bg);
+			fb_writel(val, dst++);
+		}
+		src1 += image->width / 8;
+		dst1 += info->fix.line_length;
+	}
+}
+
+/* vt8623fb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
+static void vt8623fb_iplan_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+	u32 fg = expand_color(rect->color);
+	u8 __iomem *dst1;
+	u32 __iomem *dst;
+	int x, y;
+
+	dst1 = info->screen_base + (rect->dy * info->fix.line_length)
+		 + ((rect->dx / 8) * 4);
+
+	for (y = 0; y < rect->height; y++) {
+		dst = (u32 __iomem *) dst1;
+		for (x = 0; x < rect->width; x += 8) {
+			fb_writel(fg, dst++);
+		}
+		dst1 += info->fix.line_length;
+	}
+}
+
+
+/* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */
+static inline u32 expand_pixel(u32 c)
+{
+	return (((c &  1) << 24) | ((c &  2) << 27) | ((c &  4) << 14) | ((c &   8) << 17) |
+		((c & 16) <<  4) | ((c & 32) <<  7) | ((c & 64) >>  6) | ((c & 128) >>  3)) * 0xF;
+}
+
+/* vt8623fb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
+static void vt8623fb_cfb4_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	u32 fg = image->fg_color * 0x11111111;
+	u32 bg = image->bg_color * 0x11111111;
+	const u8 *src1, *src;
+	u8 __iomem *dst1;
+	u32 __iomem *dst;
+	u32 val;
+	int x, y;
+
+	src1 = image->data;
+	dst1 = info->screen_base + (image->dy * info->fix.line_length)
+		 + ((image->dx / 8) * 4);
+
+	for (y = 0; y < image->height; y++) {
+		src = src1;
+		dst = (u32 __iomem *) dst1;
+		for (x = 0; x < image->width; x += 8) {
+			val = expand_pixel(*(src++));
+			val = (val & fg) | (~val & bg);
+			fb_writel(val, dst++);
+		}
+		src1 += image->width / 8;
+		dst1 += info->fix.line_length;
+	}
+}
+
+static void vt8623fb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	if ((info->var.bits_per_pixel == 4) && (image->depth == 1)
+	    && ((image->width % 8) == 0) && ((image->dx % 8) == 0)) {
+		if (info->fix.type == FB_TYPE_INTERLEAVED_PLANES)
+			vt8623fb_iplan_imageblit(info, image);
+		else
+			vt8623fb_cfb4_imageblit(info, image);
+	} else
+		cfb_imageblit(info, image);
+}
+
+static void vt8623fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+	if ((info->var.bits_per_pixel == 4)
+	    && ((rect->width % 8) == 0) && ((rect->dx % 8) == 0)
+	    && (info->fix.type == FB_TYPE_INTERLEAVED_PLANES))
+		vt8623fb_iplan_fillrect(info, rect);
+	 else
+		cfb_fillrect(info, rect);
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+
+static void vt8623_set_pixclock(struct fb_info *info, u32 pixclock)
+{
+	u16 m, n, r;
+	u8 regval;
+	int rv;
+
+	rv = svga_compute_pll(&vt8623_pll, 1000000000 / pixclock, &m, &n, &r, info->node);
+	if (rv < 0) {
+		printk(KERN_ERR "fb%d: cannot set requested pixclock, keeping old value\n", info->node);
+		return;
+	}
+
+	/* Set VGA misc register  */
+	regval = vga_r(NULL, VGA_MIS_R);
+	vga_w(NULL, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);
+
+	/* Set clock registers */
+	vga_wseq(NULL, 0x46, (n  | (r << 6)));
+	vga_wseq(NULL, 0x47, m);
+
+	udelay(1000);
+
+	/* PLL reset */
+	svga_wseq_mask(0x40, 0x02, 0x02);
+	svga_wseq_mask(0x40, 0x00, 0x02);
+}
+
+
+static int vt8623fb_open(struct fb_info *info, int user)
+{
+	struct vt8623fb_info *par = info->par;
+
+	mutex_lock(&(par->open_lock));
+	if (par->ref_count == 0) {
+		memset(&(par->state), 0, sizeof(struct vgastate));
+		par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP;
+		par->state.num_crtc = 0xA2;
+		par->state.num_seq = 0x50;
+		save_vga(&(par->state));
+	}
+
+	par->ref_count++;
+	mutex_unlock(&(par->open_lock));
+
+	return 0;
+}
+
+static int vt8623fb_release(struct fb_info *info, int user)
+{
+	struct vt8623fb_info *par = info->par;
+
+	mutex_lock(&(par->open_lock));
+	if (par->ref_count == 0) {
+		mutex_unlock(&(par->open_lock));
+		return -EINVAL;
+	}
+
+	if (par->ref_count == 1)
+		restore_vga(&(par->state));
+
+	par->ref_count--;
+	mutex_unlock(&(par->open_lock));
+
+	return 0;
+}
+
+static int vt8623fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	int rv, mem, step;
+
+	/* Find appropriate format */
+	rv = svga_match_format (vt8623fb_formats, var, NULL);
+	if (rv < 0)
+	{
+		printk(KERN_ERR "fb%d: unsupported mode requested\n", info->node);
+		return rv;
+	}
+
+	/* Do not allow to have real resoulution larger than virtual */
+	if (var->xres > var->xres_virtual)
+		var->xres_virtual = var->xres;
+
+	if (var->yres > var->yres_virtual)
+		var->yres_virtual = var->yres;
+
+	/* Round up xres_virtual to have proper alignment of lines */
+	step = vt8623fb_formats[rv].xresstep - 1;
+	var->xres_virtual = (var->xres_virtual+step) & ~step;
+
+	/* Check whether have enough memory */
+	mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual;
+	if (mem > info->screen_size)
+	{
+		printk(KERN_ERR "fb%d: not enough framebuffer memory (%d kB requested , %d kB available)\n", info->node, mem >> 10, (unsigned int) (info->screen_size >> 10));
+		return -EINVAL;
+	}
+
+	/* Text mode is limited to 256 kB of memory */
+	if ((var->bits_per_pixel == 0) && (mem > (256*1024)))
+	{
+		printk(KERN_ERR "fb%d: text framebuffer size too large (%d kB requested, 256 kB possible)\n", info->node, mem >> 10);
+		return -EINVAL;
+	}
+
+	rv = svga_check_timings (&vt8623_timing_regs, var, info->node);
+	if (rv < 0)
+	{
+		printk(KERN_ERR "fb%d: invalid timings requested\n", info->node);
+		return rv;
+	}
+
+	/* Interlaced mode not supported */
+	if (var->vmode & FB_VMODE_INTERLACED)
+		return -EINVAL;
+
+	return 0;
+}
+
+
+static int vt8623fb_set_par(struct fb_info *info)
+{
+	u32 mode, offset_value, fetch_value, screen_size;
+	u32 bpp = info->var.bits_per_pixel;
+
+	if (bpp != 0) {
+		info->fix.ypanstep = 1;
+		info->fix.line_length = (info->var.xres_virtual * bpp) / 8;
+
+		info->flags &= ~FBINFO_MISC_TILEBLITTING;
+		info->tileops = NULL;
+
+		/* in 4bpp supports 8p wide tiles only, any tiles otherwise */
+		info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
+		info->pixmap.blit_y = ~(u32)0;
+
+		offset_value = (info->var.xres_virtual * bpp) / 64;
+		fetch_value  = ((info->var.xres * bpp) / 128) + 4;
+
+		if (bpp == 4)
+			fetch_value  = (info->var.xres / 8) + 8; /* + 0 is OK */
+
+		screen_size  = info->var.yres_virtual * info->fix.line_length;
+	} else {
+		info->fix.ypanstep = 16;
+		info->fix.line_length = 0;
+
+		info->flags |= FBINFO_MISC_TILEBLITTING;
+		info->tileops = &vt8623fb_tile_ops;
+
+		/* supports 8x16 tiles only */
+		info->pixmap.blit_x = 1 << (8 - 1);
+		info->pixmap.blit_y = 1 << (16 - 1);
+
+		offset_value = info->var.xres_virtual / 16;
+		fetch_value  = (info->var.xres / 8) + 8;
+		screen_size  = (info->var.xres_virtual * info->var.yres_virtual) / 64;
+	}
+
+	info->var.xoffset = 0;
+	info->var.yoffset = 0;
+	info->var.activate = FB_ACTIVATE_NOW;
+
+	/* Unlock registers */
+	svga_wseq_mask(0x10, 0x01, 0x01);
+	svga_wcrt_mask(0x11, 0x00, 0x80);
+	svga_wcrt_mask(0x47, 0x00, 0x01);
+
+	/* Device, screen and sync off */
+	svga_wseq_mask(0x01, 0x20, 0x20);
+	svga_wcrt_mask(0x36, 0x30, 0x30);
+	svga_wcrt_mask(0x17, 0x00, 0x80);
+
+	/* Set default values */
+	svga_set_default_gfx_regs();
+	svga_set_default_atc_regs();
+	svga_set_default_seq_regs();
+	svga_set_default_crt_regs();
+	svga_wcrt_multi(vt8623_line_compare_regs, 0xFFFFFFFF);
+	svga_wcrt_multi(vt8623_start_address_regs, 0);
+
+	svga_wcrt_multi(vt8623_offset_regs, offset_value);
+	svga_wseq_multi(vt8623_fetch_count_regs, fetch_value);
+
+	if (info->var.vmode & FB_VMODE_DOUBLE)
+		svga_wcrt_mask(0x09, 0x80, 0x80);
+	else
+		svga_wcrt_mask(0x09, 0x00, 0x80);
+
+	svga_wseq_mask(0x1E, 0xF0, 0xF0); // DI/DVP bus
+	svga_wseq_mask(0x2A, 0x0F, 0x0F); // DI/DVP bus
+	svga_wseq_mask(0x16, 0x08, 0xBF); // FIFO read treshold
+	vga_wseq(NULL, 0x17, 0x1F);       // FIFO depth
+	vga_wseq(NULL, 0x18, 0x4E);
+	svga_wseq_mask(0x1A, 0x08, 0x08); // enable MMIO ?
+
+	vga_wcrt(NULL, 0x32, 0x00);
+	vga_wcrt(NULL, 0x34, 0x00);
+	vga_wcrt(NULL, 0x6A, 0x80);
+	vga_wcrt(NULL, 0x6A, 0xC0);
+
+	vga_wgfx(NULL, 0x20, 0x00);
+	vga_wgfx(NULL, 0x21, 0x00);
+	vga_wgfx(NULL, 0x22, 0x00);
+
+	/* Set SR15 according to number of bits per pixel */
+	mode = svga_match_format(vt8623fb_formats, &(info->var), &(info->fix));
+	switch (mode) {
+	case 0:
+		pr_debug("fb%d: text mode\n", info->node);
+		svga_set_textmode_vga_regs();
+		svga_wseq_mask(0x15, 0x00, 0xFE);
+		svga_wcrt_mask(0x11, 0x60, 0x70);
+		break;
+	case 1:
+		pr_debug("fb%d: 4 bit pseudocolor\n", info->node);
+		vga_wgfx(NULL, VGA_GFX_MODE, 0x40);
+		svga_wseq_mask(0x15, 0x20, 0xFE);
+		svga_wcrt_mask(0x11, 0x00, 0x70);
+		break;
+	case 2:
+		pr_debug("fb%d: 4 bit pseudocolor, planar\n", info->node);
+		svga_wseq_mask(0x15, 0x00, 0xFE);
+		svga_wcrt_mask(0x11, 0x00, 0x70);
+		break;
+	case 3:
+		pr_debug("fb%d: 8 bit pseudocolor\n", info->node);
+		svga_wseq_mask(0x15, 0x22, 0xFE);
+		break;
+	case 4:
+		pr_debug("fb%d: 5/6/5 truecolor\n", info->node);
+		svga_wseq_mask(0x15, 0xB6, 0xFE);
+		break;
+	case 5:
+		pr_debug("fb%d: 8/8/8 truecolor\n", info->node);
+		svga_wseq_mask(0x15, 0xAE, 0xFE);
+		break;
+	default:
+		printk(KERN_ERR "vt8623fb: unsupported mode - bug\n");
+		return (-EINVAL);
+	}
+
+	vt8623_set_pixclock(info, info->var.pixclock);
+	svga_set_timings(&vt8623_timing_regs, &(info->var), 1, 1,
+			 (info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1, 1,
+			 1, info->node);
+
+	memset_io(info->screen_base, 0x00, screen_size);
+
+	/* Device and screen back on */
+	svga_wcrt_mask(0x17, 0x80, 0x80);
+	svga_wcrt_mask(0x36, 0x00, 0x30);
+	svga_wseq_mask(0x01, 0x00, 0x20);
+
+	return 0;
+}
+
+
+static int vt8623fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+				u_int transp, struct fb_info *fb)
+{
+	switch (fb->var.bits_per_pixel) {
+	case 0:
+	case 4:
+		if (regno >= 16)
+			return -EINVAL;
+
+		outb(0x0F, VGA_PEL_MSK);
+		outb(regno, VGA_PEL_IW);
+		outb(red >> 10, VGA_PEL_D);
+		outb(green >> 10, VGA_PEL_D);
+		outb(blue >> 10, VGA_PEL_D);
+		break;
+	case 8:
+		if (regno >= 256)
+			return -EINVAL;
+
+		outb(0xFF, VGA_PEL_MSK);
+		outb(regno, VGA_PEL_IW);
+		outb(red >> 10, VGA_PEL_D);
+		outb(green >> 10, VGA_PEL_D);
+		outb(blue >> 10, VGA_PEL_D);
+		break;
+	case 16:
+		if (regno >= 16)
+			return 0;
+
+		if (fb->var.green.length == 5)
+			((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) |
+				((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11);
+		else if (fb->var.green.length == 6)
+			((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) |
+				((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11);
+		else
+			return -EINVAL;
+		break;
+	case 24:
+	case 32:
+		if (regno >= 16)
+			return 0;
+
+		/* ((transp & 0xFF00) << 16) */
+		((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
+			(green & 0xFF00) | ((blue & 0xFF00) >> 8);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+
+static int vt8623fb_blank(int blank_mode, struct fb_info *info)
+{
+	switch (blank_mode) {
+	case FB_BLANK_UNBLANK:
+		pr_debug("fb%d: unblank\n", info->node);
+		svga_wcrt_mask(0x36, 0x00, 0x30);
+		svga_wseq_mask(0x01, 0x00, 0x20);
+		break;
+	case FB_BLANK_NORMAL:
+		pr_debug("fb%d: blank\n", info->node);
+		svga_wcrt_mask(0x36, 0x00, 0x30);
+		svga_wseq_mask(0x01, 0x20, 0x20);
+		break;
+	case FB_BLANK_HSYNC_SUSPEND:
+		pr_debug("fb%d: DPMS standby (hsync off)\n", info->node);
+		svga_wcrt_mask(0x36, 0x10, 0x30);
+		svga_wseq_mask(0x01, 0x20, 0x20);
+		break;
+	case FB_BLANK_VSYNC_SUSPEND:
+		pr_debug("fb%d: DPMS suspend (vsync off)\n", info->node);
+		svga_wcrt_mask(0x36, 0x20, 0x30);
+		svga_wseq_mask(0x01, 0x20, 0x20);
+		break;
+	case FB_BLANK_POWERDOWN:
+		pr_debug("fb%d: DPMS off (no sync)\n", info->node);
+		svga_wcrt_mask(0x36, 0x30, 0x30);
+		svga_wseq_mask(0x01, 0x20, 0x20);
+		break;
+	}
+
+	return 0;
+}
+
+
+static int vt8623fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	unsigned int offset;
+
+	/* Calculate the offset */
+	if (var->bits_per_pixel == 0) {
+		offset = (var->yoffset / 16) * var->xres_virtual + var->xoffset;
+		offset = offset >> 3;
+	} else {
+		offset = (var->yoffset * info->fix.line_length) +
+			 (var->xoffset * var->bits_per_pixel / 8);
+		offset = offset >> ((var->bits_per_pixel == 4) ? 2 : 1);
+	}
+
+	/* Set the offset */
+	svga_wcrt_multi(vt8623_start_address_regs, offset);
+
+	return 0;
+}
+
+
+/* ------------------------------------------------------------------------- */
+
+
+/* Frame buffer operations */
+
+static struct fb_ops vt8623fb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_open	= vt8623fb_open,
+	.fb_release	= vt8623fb_release,
+	.fb_check_var	= vt8623fb_check_var,
+	.fb_set_par	= vt8623fb_set_par,
+	.fb_setcolreg	= vt8623fb_setcolreg,
+	.fb_blank	= vt8623fb_blank,
+	.fb_pan_display	= vt8623fb_pan_display,
+	.fb_fillrect	= vt8623fb_fillrect,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_imageblit	= vt8623fb_imageblit,
+	.fb_get_caps    = svga_get_caps,
+};
+
+
+/* PCI probe */
+
+static int __devinit vt8623_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct fb_info *info;
+	struct vt8623fb_info *par;
+	unsigned int memsize1, memsize2;
+	int rc;
+
+	/* Ignore secondary VGA device because there is no VGA arbitration */
+	if (! svga_primary_device(dev)) {
+		dev_info(&(dev->dev), "ignoring secondary device\n");
+		return -ENODEV;
+	}
+
+	/* Allocate and fill driver data structure */
+	info = framebuffer_alloc(sizeof(struct vt8623fb_info), NULL);
+	if (! info) {
+		dev_err(&(dev->dev), "cannot allocate memory\n");
+		return -ENOMEM;
+	}
+
+	par = info->par;
+	mutex_init(&par->open_lock);
+
+	info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN;
+	info->fbops = &vt8623fb_ops;
+
+	/* Prepare PCI device */
+
+	rc = pci_enable_device(dev);
+	if (rc < 0) {
+		dev_err(&(dev->dev), "cannot enable PCI device\n");
+		goto err_enable_device;
+	}
+
+	rc = pci_request_regions(dev, "vt8623fb");
+	if (rc < 0) {
+		dev_err(&(dev->dev), "cannot reserve framebuffer region\n");
+		goto err_request_regions;
+	}
+
+	info->fix.smem_start = pci_resource_start(dev, 0);
+	info->fix.smem_len = pci_resource_len(dev, 0);
+	info->fix.mmio_start = pci_resource_start(dev, 1);
+	info->fix.mmio_len = pci_resource_len(dev, 1);
+
+	/* Map physical IO memory address into kernel space */
+	info->screen_base = pci_iomap(dev, 0, 0);
+	if (! info->screen_base) {
+		rc = -ENOMEM;
+		dev_err(&(dev->dev), "iomap for framebuffer failed\n");
+		goto err_iomap_1;
+	}
+
+	par->mmio_base = pci_iomap(dev, 1, 0);
+	if (! par->mmio_base) {
+		rc = -ENOMEM;
+		dev_err(&(dev->dev), "iomap for MMIO failed\n");
+		goto err_iomap_2;
+	}
+
+	/* Find how many physical memory there is on card */
+	memsize1 = (vga_rseq(NULL, 0x34) + 1) >> 1;
+	memsize2 = vga_rseq(NULL, 0x39) << 2;
+
+	if ((16 <= memsize1) && (memsize1 <= 64) && (memsize1 == memsize2))
+		info->screen_size = memsize1 << 20;
+	else {
+		dev_err(&(dev->dev), "memory size detection failed (%x %x), suppose 16 MB\n", memsize1, memsize2);
+		info->screen_size = 16 << 20;
+	}
+
+	info->fix.smem_len = info->screen_size;
+	strcpy(info->fix.id, "VIA VT8623");
+	info->fix.type = FB_TYPE_PACKED_PIXELS;
+	info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+	info->fix.ypanstep = 0;
+	info->fix.accel = FB_ACCEL_NONE;
+	info->pseudo_palette = (void*)par->pseudo_palette;
+
+	/* Prepare startup mode */
+
+	rc = fb_find_mode(&(info->var), info, mode, NULL, 0, NULL, 8);
+	if (! ((rc == 1) || (rc == 2))) {
+		rc = -EINVAL;
+		dev_err(&(dev->dev), "mode %s not found\n", mode);
+		goto err_find_mode;
+	}
+
+	rc = fb_alloc_cmap(&info->cmap, 256, 0);
+	if (rc < 0) {
+		dev_err(&(dev->dev), "cannot allocate colormap\n");
+		goto err_alloc_cmap;
+	}
+
+	rc = register_framebuffer(info);
+	if (rc < 0) {
+		dev_err(&(dev->dev), "cannot register framebugger\n");
+		goto err_reg_fb;
+	}
+
+	printk(KERN_INFO "fb%d: %s on %s, %d MB RAM\n", info->node, info->fix.id,
+		 pci_name(dev), info->fix.smem_len >> 20);
+
+	/* Record a reference to the driver data */
+	pci_set_drvdata(dev, info);
+
+#ifdef CONFIG_MTRR
+	if (mtrr) {
+		par->mtrr_reg = -1;
+		par->mtrr_reg = mtrr_add(info->fix.smem_start, info->fix.smem_len, MTRR_TYPE_WRCOMB, 1);
+	}
+#endif
+
+	return 0;
+
+	/* Error handling */
+err_reg_fb:
+	fb_dealloc_cmap(&info->cmap);
+err_alloc_cmap:
+err_find_mode:
+	pci_iounmap(dev, par->mmio_base);
+err_iomap_2:
+	pci_iounmap(dev, info->screen_base);
+err_iomap_1:
+	pci_release_regions(dev);
+err_request_regions:
+/*	pci_disable_device(dev); */
+err_enable_device:
+	framebuffer_release(info);
+	return rc;
+}
+
+/* PCI remove */
+
+static void __devexit vt8623_pci_remove(struct pci_dev *dev)
+{
+	struct fb_info *info = pci_get_drvdata(dev);
+	struct vt8623fb_info *par = info->par;
+
+	if (info) {
+#ifdef CONFIG_MTRR
+		if (par->mtrr_reg >= 0) {
+			mtrr_del(par->mtrr_reg, 0, 0);
+			par->mtrr_reg = -1;
+		}
+#endif
+
+		unregister_framebuffer(info);
+		fb_dealloc_cmap(&info->cmap);
+
+		pci_iounmap(dev, info->screen_base);
+		pci_iounmap(dev, par->mmio_base);
+		pci_release_regions(dev);
+/*		pci_disable_device(dev); */
+
+		pci_set_drvdata(dev, NULL);
+		framebuffer_release(info);
+	}
+}
+
+
+#ifdef CONFIG_PM
+/* PCI suspend */
+
+static int vt8623_pci_suspend(struct pci_dev* dev, pm_message_t state)
+{
+	struct fb_info *info = pci_get_drvdata(dev);
+	struct vt8623fb_info *par = info->par;
+
+	dev_info(&(dev->dev), "suspend\n");
+
+	acquire_console_sem();
+	mutex_lock(&(par->open_lock));
+
+	if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
+		mutex_unlock(&(par->open_lock));
+		release_console_sem();
+		return 0;
+	}
+
+	fb_set_suspend(info, 1);
+
+	pci_save_state(dev);
+	pci_disable_device(dev);
+	pci_set_power_state(dev, pci_choose_state(dev, state));
+
+	mutex_unlock(&(par->open_lock));
+	release_console_sem();
+
+	return 0;
+}
+
+
+/* PCI resume */
+
+static int vt8623_pci_resume(struct pci_dev* dev)
+{
+	struct fb_info *info = pci_get_drvdata(dev);
+	struct vt8623fb_info *par = info->par;
+
+	dev_info(&(dev->dev), "resume\n");
+
+	acquire_console_sem();
+	mutex_lock(&(par->open_lock));
+
+	if (par->ref_count == 0) {
+		mutex_unlock(&(par->open_lock));
+		release_console_sem();
+		return 0;
+	}
+
+	pci_set_power_state(dev, PCI_D0);
+	pci_restore_state(dev);
+
+	if (pci_enable_device(dev))
+		goto fail;
+
+	pci_set_master(dev);
+
+	vt8623fb_set_par(info);
+	fb_set_suspend(info, 0);
+
+	mutex_unlock(&(par->open_lock));
+fail:
+	release_console_sem();
+
+	return 0;
+}
+#else
+#define vt8623_pci_suspend NULL
+#define vt8623_pci_resume NULL
+#endif /* CONFIG_PM */
+
+/* List of boards that we are trying to support */
+
+static struct pci_device_id vt8623_devices[] __devinitdata = {
+	{PCI_DEVICE(PCI_VENDOR_ID_VIA, 0x3122)},
+	{0, 0, 0, 0, 0, 0, 0}
+};
+
+MODULE_DEVICE_TABLE(pci, vt8623_devices);
+
+static struct pci_driver vt8623fb_pci_driver = {
+	.name		= "vt8623fb",
+	.id_table	= vt8623_devices,
+	.probe		= vt8623_pci_probe,
+	.remove		= __devexit_p(vt8623_pci_remove),
+	.suspend	= vt8623_pci_suspend,
+	.resume		= vt8623_pci_resume,
+};
+
+/* Cleanup */
+
+static void __exit vt8623fb_cleanup(void)
+{
+	pr_debug("vt8623fb: cleaning up\n");
+	pci_unregister_driver(&vt8623fb_pci_driver);
+}
+
+/* Driver Initialisation */
+
+int __init vt8623fb_init(void)
+{
+
+#ifndef MODULE
+	char *option = NULL;
+
+	if (fb_get_options("vt8623fb", &option))
+		return -ENODEV;
+
+	if (option && *option)
+		mode = option;
+#endif
+
+	pr_debug("vt8623fb: initializing\n");
+	return pci_register_driver(&vt8623fb_pci_driver);
+}
+
+/* ------------------------------------------------------------------------- */
+
+/* Modularization */
+
+module_init(vt8623fb_init);
+module_exit(vt8623fb_cleanup);
diff --git a/fs/affs/file.c b/fs/affs/file.c
index 4aa8079..c879690 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -628,11 +628,7 @@
 			return err;
 	}
 	if (to < PAGE_CACHE_SIZE) {
-		char *kaddr = kmap_atomic(page, KM_USER0);
-
-		memset(kaddr + to, 0, PAGE_CACHE_SIZE - to);
-		flush_dcache_page(page);
-		kunmap_atomic(kaddr, KM_USER0);
+		zero_user_page(page, to, PAGE_CACHE_SIZE - to, KM_USER0);
 		if (size > offset + to) {
 			if (size < offset + PAGE_CACHE_SIZE)
 				tmp = size & ~PAGE_CACHE_MASK;
diff --git a/fs/afs/Makefile b/fs/afs/Makefile
index cf83e5d..73ce561 100644
--- a/fs/afs/Makefile
+++ b/fs/afs/Makefile
@@ -22,6 +22,7 @@
 	vlclient.o \
 	vlocation.o \
 	vnode.o \
-	volume.o
+	volume.o \
+	write.o
 
 obj-$(CONFIG_AFS_FS)  := kafs.o
diff --git a/fs/afs/afs_fs.h b/fs/afs/afs_fs.h
index 89e0d16..2198006 100644
--- a/fs/afs/afs_fs.h
+++ b/fs/afs/afs_fs.h
@@ -18,6 +18,8 @@
 enum AFS_FS_Operations {
 	FSFETCHDATA		= 130,	/* AFS Fetch file data */
 	FSFETCHSTATUS		= 132,	/* AFS Fetch file status */
+	FSSTOREDATA		= 133,	/* AFS Store file data */
+	FSSTORESTATUS		= 135,	/* AFS Store file status */
 	FSREMOVEFILE		= 136,	/* AFS Remove a file */
 	FSCREATEFILE		= 137,	/* AFS Create a file */
 	FSRENAME		= 138,	/* AFS Rename or move a file or directory */
diff --git a/fs/afs/callback.c b/fs/afs/callback.c
index 9bdbf36..f64e40f 100644
--- a/fs/afs/callback.c
+++ b/fs/afs/callback.c
@@ -44,7 +44,7 @@
 	while (!RB_EMPTY_ROOT(&server->cb_promises)) {
 		vnode = rb_entry(server->cb_promises.rb_node,
 				 struct afs_vnode, cb_promise);
-		_debug("UNPROMISE { vid=%x vn=%u uq=%u}",
+		_debug("UNPROMISE { vid=%x:%u uq=%u}",
 		       vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
 		rb_erase(&vnode->cb_promise, &server->cb_promises);
 		vnode->cb_promised = false;
@@ -84,11 +84,8 @@
 
 		/* if the vnode's data version number changed then its contents
 		 * are different */
-		if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) {
-			_debug("zap data {%x:%u}",
-			       vnode->fid.vid, vnode->fid.vnode);
-			invalidate_remote_inode(&vnode->vfs_inode);
-		}
+		if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags))
+			afs_zap_data(vnode);
 	}
 
 out:
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 0c1e902..2fb3127 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -55,7 +55,8 @@
 	.rmdir		= afs_rmdir,
 	.rename		= afs_rename,
 	.permission	= afs_permission,
-	.getattr	= afs_inode_getattr,
+	.getattr	= afs_getattr,
+	.setattr	= afs_setattr,
 };
 
 static struct dentry_operations afs_fs_dentry_operations = {
@@ -491,7 +492,7 @@
 
 	vnode = AFS_FS_I(dir);
 
-	_enter("{%x:%d},%p{%s},",
+	_enter("{%x:%u},%p{%s},",
 	       vnode->fid.vid, vnode->fid.vnode, dentry, dentry->d_name.name);
 
 	ASSERTCMP(dentry->d_inode, ==, NULL);
@@ -731,7 +732,7 @@
 
 	dvnode = AFS_FS_I(dir);
 
-	_enter("{%x:%d},{%s},%o",
+	_enter("{%x:%u},{%s},%o",
 	       dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, mode);
 
 	ret = -ENAMETOOLONG;
@@ -796,7 +797,7 @@
 
 	dvnode = AFS_FS_I(dir);
 
-	_enter("{%x:%d},{%s}",
+	_enter("{%x:%u},{%s}",
 	       dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name);
 
 	ret = -ENAMETOOLONG;
@@ -842,7 +843,7 @@
 
 	dvnode = AFS_FS_I(dir);
 
-	_enter("{%x:%d},{%s}",
+	_enter("{%x:%u},{%s}",
 	       dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name);
 
 	ret = -ENAMETOOLONG;
@@ -916,7 +917,7 @@
 
 	dvnode = AFS_FS_I(dir);
 
-	_enter("{%x:%d},{%s},%o,",
+	_enter("{%x:%u},{%s},%o,",
 	       dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name, mode);
 
 	ret = -ENAMETOOLONG;
@@ -983,7 +984,7 @@
 	vnode = AFS_FS_I(from->d_inode);
 	dvnode = AFS_FS_I(dir);
 
-	_enter("{%x:%d},{%x:%d},{%s}",
+	_enter("{%x:%u},{%x:%u},{%s}",
 	       vnode->fid.vid, vnode->fid.vnode,
 	       dvnode->fid.vid, dvnode->fid.vnode,
 	       dentry->d_name.name);
@@ -1032,7 +1033,7 @@
 
 	dvnode = AFS_FS_I(dir);
 
-	_enter("{%x:%d},{%s},%s",
+	_enter("{%x:%u},{%s},%s",
 	       dvnode->fid.vid, dvnode->fid.vnode, dentry->d_name.name,
 	       content);
 
@@ -1104,7 +1105,7 @@
 	orig_dvnode = AFS_FS_I(old_dir);
 	new_dvnode = AFS_FS_I(new_dir);
 
-	_enter("{%x:%d},{%x:%d},{%x:%d},{%s}",
+	_enter("{%x:%u},{%x:%u},{%x:%u},{%s}",
 	       orig_dvnode->fid.vid, orig_dvnode->fid.vnode,
 	       vnode->fid.vid, vnode->fid.vnode,
 	       new_dvnode->fid.vid, new_dvnode->fid.vnode,
diff --git a/fs/afs/file.c b/fs/afs/file.c
index ae25649..3e25795 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -15,32 +15,43 @@
 #include <linux/slab.h>
 #include <linux/fs.h>
 #include <linux/pagemap.h>
+#include <linux/writeback.h>
 #include "internal.h"
 
-static int afs_file_readpage(struct file *file, struct page *page);
-static void afs_file_invalidatepage(struct page *page, unsigned long offset);
-static int afs_file_releasepage(struct page *page, gfp_t gfp_flags);
+static int afs_readpage(struct file *file, struct page *page);
+static void afs_invalidatepage(struct page *page, unsigned long offset);
+static int afs_releasepage(struct page *page, gfp_t gfp_flags);
+static int afs_launder_page(struct page *page);
 
 const struct file_operations afs_file_operations = {
 	.open		= afs_open,
 	.release	= afs_release,
 	.llseek		= generic_file_llseek,
 	.read		= do_sync_read,
+	.write		= do_sync_write,
 	.aio_read	= generic_file_aio_read,
+	.aio_write	= afs_file_write,
 	.mmap		= generic_file_readonly_mmap,
 	.sendfile	= generic_file_sendfile,
+	.fsync		= afs_fsync,
 };
 
 const struct inode_operations afs_file_inode_operations = {
-	.getattr	= afs_inode_getattr,
+	.getattr	= afs_getattr,
+	.setattr	= afs_setattr,
 	.permission	= afs_permission,
 };
 
 const struct address_space_operations afs_fs_aops = {
-	.readpage	= afs_file_readpage,
-	.set_page_dirty	= __set_page_dirty_nobuffers,
-	.releasepage	= afs_file_releasepage,
-	.invalidatepage	= afs_file_invalidatepage,
+	.readpage	= afs_readpage,
+	.set_page_dirty	= afs_set_page_dirty,
+	.launder_page	= afs_launder_page,
+	.releasepage	= afs_releasepage,
+	.invalidatepage	= afs_invalidatepage,
+	.prepare_write	= afs_prepare_write,
+	.commit_write	= afs_commit_write,
+	.writepage	= afs_writepage,
+	.writepages	= afs_writepages,
 };
 
 /*
@@ -52,7 +63,7 @@
 	struct key *key;
 	int ret;
 
-	_enter("{%x:%x},", vnode->fid.vid, vnode->fid.vnode);
+	_enter("{%x:%u},", vnode->fid.vid, vnode->fid.vnode);
 
 	key = afs_request_key(vnode->volume->cell);
 	if (IS_ERR(key)) {
@@ -78,7 +89,7 @@
 {
 	struct afs_vnode *vnode = AFS_FS_I(inode);
 
-	_enter("{%x:%x},", vnode->fid.vid, vnode->fid.vnode);
+	_enter("{%x:%u},", vnode->fid.vid, vnode->fid.vnode);
 
 	key_put(file->private_data);
 	_leave(" = 0");
@@ -89,10 +100,10 @@
  * deal with notification that a page was read from the cache
  */
 #ifdef AFS_CACHING_SUPPORT
-static void afs_file_readpage_read_complete(void *cookie_data,
-					    struct page *page,
-					    void *data,
-					    int error)
+static void afs_readpage_read_complete(void *cookie_data,
+				       struct page *page,
+				       void *data,
+				       int error)
 {
 	_enter("%p,%p,%p,%d", cookie_data, page, data, error);
 
@@ -109,10 +120,10 @@
  * deal with notification that a page was written to the cache
  */
 #ifdef AFS_CACHING_SUPPORT
-static void afs_file_readpage_write_complete(void *cookie_data,
-					     struct page *page,
-					     void *data,
-					     int error)
+static void afs_readpage_write_complete(void *cookie_data,
+					struct page *page,
+					void *data,
+					int error)
 {
 	_enter("%p,%p,%p,%d", cookie_data, page, data, error);
 
@@ -121,9 +132,9 @@
 #endif
 
 /*
- * AFS read page from file (or symlink)
+ * AFS read page from file, directory or symlink
  */
-static int afs_file_readpage(struct file *file, struct page *page)
+static int afs_readpage(struct file *file, struct page *page)
 {
 	struct afs_vnode *vnode;
 	struct inode *inode;
@@ -219,39 +230,17 @@
 }
 
 /*
- * get a page cookie for the specified page
- */
-#ifdef AFS_CACHING_SUPPORT
-int afs_cache_get_page_cookie(struct page *page,
-			      struct cachefs_page **_page_cookie)
-{
-	int ret;
-
-	_enter("");
-	ret = cachefs_page_get_private(page,_page_cookie, GFP_NOIO);
-
-	_leave(" = %d", ret);
-	return ret;
-}
-#endif
-
-/*
  * invalidate part or all of a page
  */
-static void afs_file_invalidatepage(struct page *page, unsigned long offset)
+static void afs_invalidatepage(struct page *page, unsigned long offset)
 {
 	int ret = 1;
 
-	_enter("{%lu},%lu", page->index, offset);
+	kenter("{%lu},%lu", page->index, offset);
 
 	BUG_ON(!PageLocked(page));
 
 	if (PagePrivate(page)) {
-#ifdef AFS_CACHING_SUPPORT
-		struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
-		cachefs_uncache_page(vnode->cache,page);
-#endif
-
 		/* We release buffers only if the entire page is being
 		 * invalidated.
 		 * The get_block cached value has been unconditionally
@@ -272,25 +261,33 @@
 }
 
 /*
+ * write back a dirty page
+ */
+static int afs_launder_page(struct page *page)
+{
+	_enter("{%lu}", page->index);
+
+	return 0;
+}
+
+/*
  * release a page and cleanup its private data
  */
-static int afs_file_releasepage(struct page *page, gfp_t gfp_flags)
+static int afs_releasepage(struct page *page, gfp_t gfp_flags)
 {
-	struct cachefs_page *pageio;
+	struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
+	struct afs_writeback *wb;
 
-	_enter("{%lu},%x", page->index, gfp_flags);
+	_enter("{{%x:%u}[%lu],%lx},%x",
+	       vnode->fid.vid, vnode->fid.vnode, page->index, page->flags,
+	       gfp_flags);
 
 	if (PagePrivate(page)) {
-#ifdef AFS_CACHING_SUPPORT
-		struct afs_vnode *vnode = AFS_FS_I(page->mapping->host);
-		cachefs_uncache_page(vnode->cache, page);
-#endif
-
-		pageio = (struct cachefs_page *) page_private(page);
+		wb = (struct afs_writeback *) page_private(page);
+		ASSERT(wb != NULL);
 		set_page_private(page, 0);
 		ClearPagePrivate(page);
-
-		kfree(pageio);
+		afs_put_writeback(wb);
 	}
 
 	_leave(" = 0");
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index e54e6c2..025b190 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -33,8 +33,10 @@
  */
 static void xdr_decode_AFSFetchStatus(const __be32 **_bp,
 				      struct afs_file_status *status,
-				      struct afs_vnode *vnode)
+				      struct afs_vnode *vnode,
+				      afs_dataversion_t *store_version)
 {
+	afs_dataversion_t expected_version;
 	const __be32 *bp = *_bp;
 	umode_t mode;
 	u64 data_version, size;
@@ -101,7 +103,11 @@
 		vnode->vfs_inode.i_atime	= vnode->vfs_inode.i_ctime;
 	}
 
-	if (status->data_version != data_version) {
+	expected_version = status->data_version;
+	if (store_version)
+		expected_version = *store_version;
+
+	if (expected_version != data_version) {
 		status->data_version = data_version;
 		if (vnode && !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
 			_debug("vnode modified %llx on {%x:%u}",
@@ -110,6 +116,8 @@
 			set_bit(AFS_VNODE_MODIFIED, &vnode->flags);
 			set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
 		}
+	} else if (store_version) {
+		status->data_version = data_version;
 	}
 }
 
@@ -156,6 +164,44 @@
 }
 
 /*
+ * encode the requested attributes into an AFSStoreStatus block
+ */
+static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
+{
+	__be32 *bp = *_bp;
+	u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
+
+	mask = 0;
+	if (attr->ia_valid & ATTR_MTIME) {
+		mask |= AFS_SET_MTIME;
+		mtime = attr->ia_mtime.tv_sec;
+	}
+
+	if (attr->ia_valid & ATTR_UID) {
+		mask |= AFS_SET_OWNER;
+		owner = attr->ia_uid;
+	}
+
+	if (attr->ia_valid & ATTR_GID) {
+		mask |= AFS_SET_GROUP;
+		group = attr->ia_gid;
+	}
+
+	if (attr->ia_valid & ATTR_MODE) {
+		mask |= AFS_SET_MODE;
+		mode = attr->ia_mode & S_IALLUGO;
+	}
+
+	*bp++ = htonl(mask);
+	*bp++ = htonl(mtime);
+	*bp++ = htonl(owner);
+	*bp++ = htonl(group);
+	*bp++ = htonl(mode);
+	*bp++ = 0;		/* segment size */
+	*_bp = bp;
+}
+
+/*
  * deliver reply data to an FS.FetchStatus
  */
 static int afs_deliver_fs_fetch_status(struct afs_call *call,
@@ -175,7 +221,7 @@
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+	xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
 	xdr_decode_AFSCallBack(&bp, vnode);
 	if (call->reply2)
 		xdr_decode_AFSVolSync(&bp, call->reply2);
@@ -206,7 +252,7 @@
 	struct afs_call *call;
 	__be32 *bp;
 
-	_enter(",%x,{%x:%d},,",
+	_enter(",%x,{%x:%u},,",
 	       key_serial(key), vnode->fid.vid, vnode->fid.vnode);
 
 	call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
@@ -265,25 +311,20 @@
 		call->offset = 0;
 		call->unmarshall++;
 
-		if (call->count < PAGE_SIZE) {
-			page = call->reply3;
-			buffer = kmap_atomic(page, KM_USER0);
-			memset(buffer + PAGE_SIZE - call->count, 0,
-			       call->count);
-			kunmap_atomic(buffer, KM_USER0);
-		}
-
 		/* extract the returned data */
 	case 2:
 		_debug("extract data");
-		page = call->reply3;
-		buffer = kmap_atomic(page, KM_USER0);
-		ret = afs_extract_data(call, skb, last, buffer, call->count);
-		kunmap_atomic(buffer, KM_USER0);
-		switch (ret) {
-		case 0:		break;
-		case -EAGAIN:	return 0;
-		default:	return ret;
+		if (call->count > 0) {
+			page = call->reply3;
+			buffer = kmap_atomic(page, KM_USER0);
+			ret = afs_extract_data(call, skb, last, buffer,
+					       call->count);
+			kunmap_atomic(buffer, KM_USER0);
+			switch (ret) {
+			case 0:		break;
+			case -EAGAIN:	return 0;
+			default:	return ret;
+			}
 		}
 
 		call->offset = 0;
@@ -300,7 +341,7 @@
 		}
 
 		bp = call->buffer;
-		xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+		xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
 		xdr_decode_AFSCallBack(&bp, vnode);
 		if (call->reply2)
 			xdr_decode_AFSVolSync(&bp, call->reply2);
@@ -318,6 +359,14 @@
 	if (!last)
 		return 0;
 
+	if (call->count < PAGE_SIZE) {
+		_debug("clear");
+		page = call->reply3;
+		buffer = kmap_atomic(page, KM_USER0);
+		memset(buffer + call->count, 0, PAGE_SIZE - call->count);
+		kunmap_atomic(buffer, KM_USER0);
+	}
+
 	_leave(" = 0 [done]");
 	return 0;
 }
@@ -476,8 +525,8 @@
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
 	xdr_decode_AFSFid(&bp, call->reply2);
-	xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL);
-	xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+	xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL);
+	xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
 	xdr_decode_AFSCallBack_raw(&bp, call->reply4);
 	/* xdr_decode_AFSVolSync(&bp, call->replyX); */
 
@@ -574,7 +623,7 @@
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+	xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
 	/* xdr_decode_AFSVolSync(&bp, call->replyX); */
 
 	_leave(" = 0 [done]");
@@ -657,8 +706,8 @@
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
-	xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode);
+	xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
+	xdr_decode_AFSFetchStatus(&bp, &dvnode->status, dvnode, NULL);
 	/* xdr_decode_AFSVolSync(&bp, call->replyX); */
 
 	_leave(" = 0 [done]");
@@ -746,8 +795,8 @@
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
 	xdr_decode_AFSFid(&bp, call->reply2);
-	xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL);
-	xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode);
+	xdr_decode_AFSFetchStatus(&bp, call->reply3, NULL, NULL);
+	xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, NULL);
 	/* xdr_decode_AFSVolSync(&bp, call->replyX); */
 
 	_leave(" = 0 [done]");
@@ -852,9 +901,10 @@
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode);
+	xdr_decode_AFSFetchStatus(&bp, &orig_dvnode->status, orig_dvnode, NULL);
 	if (new_dvnode != orig_dvnode)
-		xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode);
+		xdr_decode_AFSFetchStatus(&bp, &new_dvnode->status, new_dvnode,
+					  NULL);
 	/* xdr_decode_AFSVolSync(&bp, call->replyX); */
 
 	_leave(" = 0 [done]");
@@ -936,3 +986,262 @@
 
 	return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
 }
+
+/*
+ * deliver reply data to an FS.StoreData
+ */
+static int afs_deliver_fs_store_data(struct afs_call *call,
+				     struct sk_buff *skb, bool last)
+{
+	struct afs_vnode *vnode = call->reply;
+	const __be32 *bp;
+
+	_enter(",,%u", last);
+
+	afs_transfer_reply(call, skb);
+	if (!last) {
+		_leave(" = 0 [more]");
+		return 0;
+	}
+
+	if (call->reply_size != call->reply_max) {
+		_leave(" = -EBADMSG [%u != %u]",
+		       call->reply_size, call->reply_max);
+		return -EBADMSG;
+	}
+
+	/* unmarshall the reply once we've received all of it */
+	bp = call->buffer;
+	xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode,
+				  &call->store_version);
+	/* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+	afs_pages_written_back(vnode, call);
+
+	_leave(" = 0 [done]");
+	return 0;
+}
+
+/*
+ * FS.StoreData operation type
+ */
+static const struct afs_call_type afs_RXFSStoreData = {
+	.name		= "FS.StoreData",
+	.deliver	= afs_deliver_fs_store_data,
+	.abort_to_error	= afs_abort_to_error,
+	.destructor	= afs_flat_call_destructor,
+};
+
+/*
+ * store a set of pages
+ */
+int afs_fs_store_data(struct afs_server *server, struct afs_writeback *wb,
+		      pgoff_t first, pgoff_t last,
+		      unsigned offset, unsigned to,
+		      const struct afs_wait_mode *wait_mode)
+{
+	struct afs_vnode *vnode = wb->vnode;
+	struct afs_call *call;
+	loff_t size, pos, i_size;
+	__be32 *bp;
+
+	_enter(",%x,{%x:%u},,",
+	       key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
+
+	size = to - offset;
+	if (first != last)
+		size += (loff_t)(last - first) << PAGE_SHIFT;
+	pos = (loff_t)first << PAGE_SHIFT;
+	pos += offset;
+
+	i_size = i_size_read(&vnode->vfs_inode);
+	if (pos + size > i_size)
+		i_size = size + pos;
+
+	_debug("size %llx, at %llx, i_size %llx",
+	       (unsigned long long) size, (unsigned long long) pos,
+	       (unsigned long long) i_size);
+
+	BUG_ON(i_size > 0xffffffff); // TODO: use 64-bit store
+
+	call = afs_alloc_flat_call(&afs_RXFSStoreData,
+				   (4 + 6 + 3) * 4,
+				   (21 + 6) * 4);
+	if (!call)
+		return -ENOMEM;
+
+	call->wb = wb;
+	call->key = wb->key;
+	call->reply = vnode;
+	call->service_id = FS_SERVICE;
+	call->port = htons(AFS_FS_PORT);
+	call->mapping = vnode->vfs_inode.i_mapping;
+	call->first = first;
+	call->last = last;
+	call->first_offset = offset;
+	call->last_to = to;
+	call->send_pages = true;
+	call->store_version = vnode->status.data_version + 1;
+
+	/* marshall the parameters */
+	bp = call->request;
+	*bp++ = htonl(FSSTOREDATA);
+	*bp++ = htonl(vnode->fid.vid);
+	*bp++ = htonl(vnode->fid.vnode);
+	*bp++ = htonl(vnode->fid.unique);
+
+	*bp++ = 0; /* mask */
+	*bp++ = 0; /* mtime */
+	*bp++ = 0; /* owner */
+	*bp++ = 0; /* group */
+	*bp++ = 0; /* unix mode */
+	*bp++ = 0; /* segment size */
+
+	*bp++ = htonl(pos);
+	*bp++ = htonl(size);
+	*bp++ = htonl(i_size);
+
+	return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
+
+/*
+ * deliver reply data to an FS.StoreStatus
+ */
+static int afs_deliver_fs_store_status(struct afs_call *call,
+				       struct sk_buff *skb, bool last)
+{
+	afs_dataversion_t *store_version;
+	struct afs_vnode *vnode = call->reply;
+	const __be32 *bp;
+
+	_enter(",,%u", last);
+
+	afs_transfer_reply(call, skb);
+	if (!last) {
+		_leave(" = 0 [more]");
+		return 0;
+	}
+
+	if (call->reply_size != call->reply_max) {
+		_leave(" = -EBADMSG [%u != %u]",
+		       call->reply_size, call->reply_max);
+		return -EBADMSG;
+	}
+
+	/* unmarshall the reply once we've received all of it */
+	store_version = NULL;
+	if (call->operation_ID == FSSTOREDATA)
+		store_version = &call->store_version;
+
+	bp = call->buffer;
+	xdr_decode_AFSFetchStatus(&bp, &vnode->status, vnode, store_version);
+	/* xdr_decode_AFSVolSync(&bp, call->replyX); */
+
+	_leave(" = 0 [done]");
+	return 0;
+}
+
+/*
+ * FS.StoreStatus operation type
+ */
+static const struct afs_call_type afs_RXFSStoreStatus = {
+	.name		= "FS.StoreStatus",
+	.deliver	= afs_deliver_fs_store_status,
+	.abort_to_error	= afs_abort_to_error,
+	.destructor	= afs_flat_call_destructor,
+};
+
+static const struct afs_call_type afs_RXFSStoreData_as_Status = {
+	.name		= "FS.StoreData",
+	.deliver	= afs_deliver_fs_store_status,
+	.abort_to_error	= afs_abort_to_error,
+	.destructor	= afs_flat_call_destructor,
+};
+
+/*
+ * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
+ * so as to alter the file size also
+ */
+static int afs_fs_setattr_size(struct afs_server *server, struct key *key,
+			       struct afs_vnode *vnode, struct iattr *attr,
+			       const struct afs_wait_mode *wait_mode)
+{
+	struct afs_call *call;
+	__be32 *bp;
+
+	_enter(",%x,{%x:%u},,",
+	       key_serial(key), vnode->fid.vid, vnode->fid.vnode);
+
+	ASSERT(attr->ia_valid & ATTR_SIZE);
+	ASSERTCMP(attr->ia_size, <=, 0xffffffff); // TODO: use 64-bit store
+
+	call = afs_alloc_flat_call(&afs_RXFSStoreData_as_Status,
+				   (4 + 6 + 3) * 4,
+				   (21 + 6) * 4);
+	if (!call)
+		return -ENOMEM;
+
+	call->key = key;
+	call->reply = vnode;
+	call->service_id = FS_SERVICE;
+	call->port = htons(AFS_FS_PORT);
+	call->store_version = vnode->status.data_version + 1;
+	call->operation_ID = FSSTOREDATA;
+
+	/* marshall the parameters */
+	bp = call->request;
+	*bp++ = htonl(FSSTOREDATA);
+	*bp++ = htonl(vnode->fid.vid);
+	*bp++ = htonl(vnode->fid.vnode);
+	*bp++ = htonl(vnode->fid.unique);
+
+	xdr_encode_AFS_StoreStatus(&bp, attr);
+
+	*bp++ = 0;				/* position of start of write */
+	*bp++ = 0;				/* size of write */
+	*bp++ = htonl(attr->ia_size);		/* new file length */
+
+	return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
+
+/*
+ * set the attributes on a file, using FS.StoreData if there's a change in file
+ * size, and FS.StoreStatus otherwise
+ */
+int afs_fs_setattr(struct afs_server *server, struct key *key,
+		   struct afs_vnode *vnode, struct iattr *attr,
+		   const struct afs_wait_mode *wait_mode)
+{
+	struct afs_call *call;
+	__be32 *bp;
+
+	if (attr->ia_valid & ATTR_SIZE)
+		return afs_fs_setattr_size(server, key, vnode, attr,
+					   wait_mode);
+
+	_enter(",%x,{%x:%u},,",
+	       key_serial(key), vnode->fid.vid, vnode->fid.vnode);
+
+	call = afs_alloc_flat_call(&afs_RXFSStoreStatus,
+				   (4 + 6) * 4,
+				   (21 + 6) * 4);
+	if (!call)
+		return -ENOMEM;
+
+	call->key = key;
+	call->reply = vnode;
+	call->service_id = FS_SERVICE;
+	call->port = htons(AFS_FS_PORT);
+	call->operation_ID = FSSTORESTATUS;
+
+	/* marshall the parameters */
+	bp = call->request;
+	*bp++ = htonl(FSSTORESTATUS);
+	*bp++ = htonl(vnode->fid.vid);
+	*bp++ = htonl(vnode->fid.vnode);
+	*bp++ = htonl(vnode->fid.unique);
+
+	xdr_encode_AFS_StoreStatus(&bp, attr);
+
+	return afs_make_call(&server->addr, call, GFP_NOFS, wait_mode);
+}
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index c184a4e..515a5d1 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -125,7 +125,7 @@
 	struct inode *inode;
 	int ret;
 
-	_enter(",{%u,%u,%u},,", fid->vid, fid->vnode, fid->unique);
+	_enter(",{%x:%u.%u},,", fid->vid, fid->vnode, fid->unique);
 
 	as = sb->s_fs_info;
 	data.volume = as->volume;
@@ -204,6 +204,19 @@
 }
 
 /*
+ * mark the data attached to an inode as obsolete due to a write on the server
+ * - might also want to ditch all the outstanding writes and dirty pages
+ */
+void afs_zap_data(struct afs_vnode *vnode)
+{
+	_enter("zap data {%x:%u}", vnode->fid.vid, vnode->fid.vnode);
+
+	/* nuke all the non-dirty pages that aren't locked, mapped or being
+	 * written back */
+	invalidate_remote_inode(&vnode->vfs_inode);
+}
+
+/*
  * validate a vnode/inode
  * - there are several things we need to check
  *   - parent dir data changes (rm, rmdir, rename, mkdir, create, link,
@@ -258,10 +271,8 @@
 
 	/* if the vnode's data version number changed then its contents are
 	 * different */
-	if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) {
-		_debug("zap data {%x:%d}", vnode->fid.vid, vnode->fid.vnode);
-		invalidate_remote_inode(&vnode->vfs_inode);
-	}
+	if (test_and_clear_bit(AFS_VNODE_ZAP_DATA, &vnode->flags))
+		afs_zap_data(vnode);
 
 	clear_bit(AFS_VNODE_MODIFIED, &vnode->flags);
 	mutex_unlock(&vnode->validate_lock);
@@ -278,7 +289,7 @@
 /*
  * read the attributes of an inode
  */
-int afs_inode_getattr(struct vfsmount *mnt, struct dentry *dentry,
+int afs_getattr(struct vfsmount *mnt, struct dentry *dentry,
 		      struct kstat *stat)
 {
 	struct inode *inode;
@@ -301,7 +312,7 @@
 
 	vnode = AFS_FS_I(inode);
 
-	_enter("{%x:%d.%d} v=%u x=%u t=%u }",
+	_enter("{%x:%u.%d} v=%u x=%u t=%u }",
 	       vnode->fid.vid,
 	       vnode->fid.vnode,
 	       vnode->fid.unique,
@@ -323,6 +334,7 @@
 		vnode->server = NULL;
 	}
 
+	ASSERT(list_empty(&vnode->writebacks));
 	ASSERT(!vnode->cb_promised);
 
 #ifdef AFS_CACHING_SUPPORT
@@ -339,3 +351,47 @@
 
 	_leave("");
 }
+
+/*
+ * set the attributes of an inode
+ */
+int afs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+	struct afs_vnode *vnode = AFS_FS_I(dentry->d_inode);
+	struct key *key;
+	int ret;
+
+	_enter("{%x:%u},{n=%s},%x",
+	       vnode->fid.vid, vnode->fid.vnode, dentry->d_name.name,
+	       attr->ia_valid);
+
+	if (!(attr->ia_valid & (ATTR_SIZE | ATTR_MODE | ATTR_UID | ATTR_GID |
+				ATTR_MTIME))) {
+		_leave(" = 0 [unsupported]");
+		return 0;
+	}
+
+	/* flush any dirty data outstanding on a regular file */
+	if (S_ISREG(vnode->vfs_inode.i_mode)) {
+		filemap_write_and_wait(vnode->vfs_inode.i_mapping);
+		afs_writeback_all(vnode);
+	}
+
+	if (attr->ia_valid & ATTR_FILE) {
+		key = attr->ia_file->private_data;
+	} else {
+		key = afs_request_key(vnode->volume->cell);
+		if (IS_ERR(key)) {
+			ret = PTR_ERR(key);
+			goto error;
+		}
+	}
+
+	ret = afs_vnode_setattr(vnode, key, attr);
+	if (!(attr->ia_valid & ATTR_FILE))
+		key_put(key);
+
+error:
+	_leave(" = %d", ret);
+	return ret;
+}
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index d90c158..a30d4fa 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -21,6 +21,7 @@
 
 #define AFS_CELL_MAX_ADDRS 15
 
+struct pagevec;
 struct afs_call;
 
 typedef enum {
@@ -75,12 +76,15 @@
 	struct key		*key;		/* security for this call */
 	struct afs_server	*server;	/* server affected by incoming CM call */
 	void			*request;	/* request data (first part) */
-	void			*request2;	/* request data (second part) */
+	struct address_space	*mapping;	/* page set */
+	struct afs_writeback	*wb;		/* writeback being performed */
 	void			*buffer;	/* reply receive buffer */
 	void			*reply;		/* reply buffer (first part) */
 	void			*reply2;	/* reply buffer (second part) */
 	void			*reply3;	/* reply buffer (third part) */
 	void			*reply4;	/* reply buffer (fourth part) */
+	pgoff_t			first;		/* first page in mapping to deal with */
+	pgoff_t			last;		/* last page in mapping to deal with */
 	enum {					/* call state */
 		AFS_CALL_REQUESTING,	/* request is being sent for outgoing call */
 		AFS_CALL_AWAIT_REPLY,	/* awaiting reply to outgoing call */
@@ -97,14 +101,18 @@
 	unsigned		request_size;	/* size of request data */
 	unsigned		reply_max;	/* maximum size of reply */
 	unsigned		reply_size;	/* current size of reply */
+	unsigned		first_offset;	/* offset into mapping[first] */
+	unsigned		last_to;	/* amount of mapping[last] */
 	unsigned short		offset;		/* offset into received data store */
 	unsigned char		unmarshall;	/* unmarshalling phase */
 	bool			incoming;	/* T if incoming call */
+	bool			send_pages;	/* T if data from mapping should be sent */
 	u16			service_id;	/* RxRPC service ID to call */
 	__be16			port;		/* target UDP port */
 	__be32			operation_ID;	/* operation ID for an incoming call */
 	u32			count;		/* count for use in unmarshalling */
 	__be32			tmp;		/* place to extract temporary data */
+	afs_dataversion_t	store_version;	/* updated version expected from store */
 };
 
 struct afs_call_type {
@@ -124,6 +132,32 @@
 };
 
 /*
+ * record of an outstanding writeback on a vnode
+ */
+struct afs_writeback {
+	struct list_head	link;		/* link in vnode->writebacks */
+	struct work_struct	writer;		/* work item to perform the writeback */
+	struct afs_vnode	*vnode;		/* vnode to which this write applies */
+	struct key		*key;		/* owner of this write */
+	wait_queue_head_t	waitq;		/* completion and ready wait queue */
+	pgoff_t			first;		/* first page in batch */
+	pgoff_t			point;		/* last page in current store op */
+	pgoff_t			last;		/* last page in batch (inclusive) */
+	unsigned		offset_first;	/* offset into first page of start of write */
+	unsigned		to_last;	/* offset into last page of end of write */
+	int			num_conflicts;	/* count of conflicting writes in list */
+	int			usage;
+	bool			conflicts;	/* T if has dependent conflicts */
+	enum {
+		AFS_WBACK_SYNCING,		/* synchronisation being performed */
+		AFS_WBACK_PENDING,		/* write pending */
+		AFS_WBACK_CONFLICTING,		/* conflicting writes posted */
+		AFS_WBACK_WRITING,		/* writing back */
+		AFS_WBACK_COMPLETE		/* the writeback record has been unlinked */
+	} state __attribute__((packed));
+};
+
+/*
  * AFS superblock private data
  * - there's one superblock per volume
  */
@@ -305,6 +339,7 @@
 	wait_queue_head_t	update_waitq;	/* status fetch waitqueue */
 	int			update_cnt;	/* number of outstanding ops that will update the
 						 * status */
+	spinlock_t		writeback_lock;	/* lock for writebacks */
 	spinlock_t		lock;		/* waitqueue/flags lock */
 	unsigned long		flags;
 #define AFS_VNODE_CB_BROKEN	0		/* set if vnode's callback was broken */
@@ -316,6 +351,8 @@
 
 	long			acl_order;	/* ACL check count (callback break count) */
 
+	struct list_head	writebacks;	/* alterations in pagecache that need writing */
+
 	/* outstanding callback notification on this file */
 	struct rb_node		server_rb;	/* link in server->fs_vnodes */
 	struct rb_node		cb_promise;	/* link in server->cb_promises */
@@ -433,10 +470,6 @@
 extern int afs_open(struct inode *, struct file *);
 extern int afs_release(struct inode *, struct file *);
 
-#ifdef AFS_CACHING_SUPPORT
-extern int afs_cache_get_page_cookie(struct page *, struct cachefs_page **);
-#endif
-
 /*
  * fsclient.c
  */
@@ -467,6 +500,12 @@
 			 struct afs_vnode *, const char *,
 			 struct afs_vnode *, const char *,
 			 const struct afs_wait_mode *);
+extern int afs_fs_store_data(struct afs_server *, struct afs_writeback *,
+			     pgoff_t, pgoff_t, unsigned, unsigned,
+			     const struct afs_wait_mode *);
+extern int afs_fs_setattr(struct afs_server *, struct key *,
+			  struct afs_vnode *, struct iattr *,
+			  const struct afs_wait_mode *);
 
 /*
  * inode.c
@@ -474,10 +513,10 @@
 extern struct inode *afs_iget(struct super_block *, struct key *,
 			      struct afs_fid *, struct afs_file_status *,
 			      struct afs_callback *);
+extern void afs_zap_data(struct afs_vnode *);
 extern int afs_validate(struct afs_vnode *, struct key *);
-extern int afs_inode_getattr(struct vfsmount *, struct dentry *,
-			     struct kstat *);
-extern void afs_zap_permits(struct rcu_head *);
+extern int afs_getattr(struct vfsmount *, struct dentry *, struct kstat *);
+extern int afs_setattr(struct dentry *, struct iattr *);
 extern void afs_clear_inode(struct inode *);
 
 /*
@@ -533,6 +572,7 @@
  */
 extern void afs_clear_permits(struct afs_vnode *);
 extern void afs_cache_permit(struct afs_vnode *, struct key *, long);
+extern void afs_zap_permits(struct rcu_head *);
 extern struct key *afs_request_key(struct afs_cell *);
 extern int afs_permission(struct inode *, int, struct nameidata *);
 
@@ -629,6 +669,9 @@
 			     struct afs_file_status *, struct afs_server **);
 extern int afs_vnode_rename(struct afs_vnode *, struct afs_vnode *,
 			    struct key *, const char *, const char *);
+extern int afs_vnode_store_data(struct afs_writeback *, pgoff_t, pgoff_t,
+				unsigned, unsigned);
+extern int afs_vnode_setattr(struct afs_vnode *, struct key *, struct iattr *);
 
 /*
  * volume.c
@@ -645,6 +688,23 @@
 extern int afs_volume_release_fileserver(struct afs_vnode *,
 					 struct afs_server *, int);
 
+/*
+ * write.c
+ */
+extern int afs_set_page_dirty(struct page *);
+extern void afs_put_writeback(struct afs_writeback *);
+extern int afs_prepare_write(struct file *, struct page *, unsigned, unsigned);
+extern int afs_commit_write(struct file *, struct page *, unsigned, unsigned);
+extern int afs_writepage(struct page *, struct writeback_control *);
+extern int afs_writepages(struct address_space *, struct writeback_control *);
+extern int afs_write_inode(struct inode *, int);
+extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *);
+extern ssize_t afs_file_write(struct kiocb *, const struct iovec *,
+			      unsigned long, loff_t);
+extern int afs_writeback_all(struct afs_vnode *);
+extern int afs_fsync(struct file *, struct dentry *, int);
+
+
 /*****************************************************************************/
 /*
  * debug tracing
@@ -726,6 +786,21 @@
 	}								\
 } while(0)
 
+#define ASSERTRANGE(L, OP1, N, OP2, H)					\
+do {									\
+	if (unlikely(!((L) OP1 (N)) || !((N) OP2 (H)))) {		\
+		printk(KERN_ERR "\n");					\
+		printk(KERN_ERR "AFS: Assertion failed\n");		\
+		printk(KERN_ERR "%lu "#OP1" %lu "#OP2" %lu is false\n",	\
+		       (unsigned long)(L), (unsigned long)(N),		\
+		       (unsigned long)(H));				\
+		printk(KERN_ERR "0x%lx "#OP1" 0x%lx "#OP2" 0x%lx is false\n", \
+		       (unsigned long)(L), (unsigned long)(N),		\
+		       (unsigned long)(H));				\
+		BUG();							\
+	}								\
+} while(0)
+
 #define ASSERTIF(C, X)						\
 do {								\
 	if (unlikely((C) && !(X))) {				\
@@ -758,6 +833,10 @@
 do {						\
 } while(0)
 
+#define ASSERTRANGE(L, OP1, N, OP2, H)		\
+do {						\
+} while(0)
+
 #define ASSERTIF(C, X)				\
 do {						\
 } while(0)
diff --git a/fs/afs/main.c b/fs/afs/main.c
index 80ec6fd..f1f71ff 100644
--- a/fs/afs/main.c
+++ b/fs/afs/main.c
@@ -149,6 +149,7 @@
 	afs_vlocation_purge();
 	afs_cell_purge();
 	afs_proc_cleanup();
+	rcu_barrier();
 	printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
 	return ret;
 }
@@ -176,6 +177,7 @@
 	cachefs_unregister_netfs(&afs_cache_netfs);
 #endif
 	afs_proc_cleanup();
+	rcu_barrier();
 }
 
 module_exit(afs_exit);
diff --git a/fs/afs/misc.c b/fs/afs/misc.c
index cdb9792..d1a889c 100644
--- a/fs/afs/misc.c
+++ b/fs/afs/misc.c
@@ -22,6 +22,7 @@
 {
 	switch (abort_code) {
 	case 13:		return -EACCES;
+	case 27:		return -EFBIG;
 	case 30:		return -EROFS;
 	case VSALVAGE:		return -EIO;
 	case VNOVNODE:		return -ENOENT;
diff --git a/fs/afs/mntpt.c b/fs/afs/mntpt.c
index 034fcfd..a3684dc 100644
--- a/fs/afs/mntpt.c
+++ b/fs/afs/mntpt.c
@@ -36,7 +36,7 @@
 	.lookup		= afs_mntpt_lookup,
 	.follow_link	= afs_mntpt_follow_link,
 	.readlink	= page_readlink,
-	.getattr	= afs_inode_getattr,
+	.getattr	= afs_getattr,
 };
 
 static LIST_HEAD(afs_vfsmounts);
@@ -58,7 +58,8 @@
 	char *buf;
 	int ret;
 
-	_enter("{%u,%u}", vnode->fid.vnode, vnode->fid.unique);
+	_enter("{%x:%u,%u}",
+	       vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
 
 	/* read the contents of the symlink into the pagecache */
 	page = read_mapping_page(AFS_VNODE_TO_I(vnode)->i_mapping, 0, &file);
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 222c1a3..04189c4 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -237,6 +237,70 @@
 }
 
 /*
+ * attach the data from a bunch of pages on an inode to a call
+ */
+int afs_send_pages(struct afs_call *call, struct msghdr *msg, struct kvec *iov)
+{
+	struct page *pages[8];
+	unsigned count, n, loop, offset, to;
+	pgoff_t first = call->first, last = call->last;
+	int ret;
+
+	_enter("");
+
+	offset = call->first_offset;
+	call->first_offset = 0;
+
+	do {
+		_debug("attach %lx-%lx", first, last);
+
+		count = last - first + 1;
+		if (count > ARRAY_SIZE(pages))
+			count = ARRAY_SIZE(pages);
+		n = find_get_pages_contig(call->mapping, first, count, pages);
+		ASSERTCMP(n, ==, count);
+
+		loop = 0;
+		do {
+			msg->msg_flags = 0;
+			to = PAGE_SIZE;
+			if (first + loop >= last)
+				to = call->last_to;
+			else
+				msg->msg_flags = MSG_MORE;
+			iov->iov_base = kmap(pages[loop]) + offset;
+			iov->iov_len = to - offset;
+			offset = 0;
+
+			_debug("- range %u-%u%s",
+			       offset, to, msg->msg_flags ? " [more]" : "");
+			msg->msg_iov = (struct iovec *) iov;
+			msg->msg_iovlen = 1;
+
+			/* have to change the state *before* sending the last
+			 * packet as RxRPC might give us the reply before it
+			 * returns from sending the request */
+			if (first + loop >= last)
+				call->state = AFS_CALL_AWAIT_REPLY;
+			ret = rxrpc_kernel_send_data(call->rxcall, msg,
+						     to - offset);
+			kunmap(pages[loop]);
+			if (ret < 0)
+				break;
+		} while (++loop < count);
+		first += count;
+
+		for (loop = 0; loop < count; loop++)
+			put_page(pages[loop]);
+		if (ret < 0)
+			break;
+	} while (first < last);
+
+	_leave(" = %d", ret);
+	return ret;
+}
+
+/*
  * initiate a call
  */
 int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
@@ -253,8 +317,9 @@
 	ASSERT(call->type != NULL);
 	ASSERT(call->type->name != NULL);
 
-	_debug("MAKE %p{%s} [%d]",
-	       call, call->type->name, atomic_read(&afs_outstanding_calls));
+	_debug("____MAKE %p{%s,%x} [%d]____",
+	       call, call->type->name, key_serial(call->key),
+	       atomic_read(&afs_outstanding_calls));
 
 	call->wait_mode = wait_mode;
 	INIT_WORK(&call->async_work, afs_process_async_call);
@@ -289,16 +354,23 @@
 	msg.msg_iovlen		= 1;
 	msg.msg_control		= NULL;
 	msg.msg_controllen	= 0;
-	msg.msg_flags		= 0;
+	msg.msg_flags		= (call->send_pages ? MSG_MORE : 0);
 
 	/* have to change the state *before* sending the last packet as RxRPC
 	 * might give us the reply before it returns from sending the
 	 * request */
-	call->state = AFS_CALL_AWAIT_REPLY;
+	if (!call->send_pages)
+		call->state = AFS_CALL_AWAIT_REPLY;
 	ret = rxrpc_kernel_send_data(rxcall, &msg, call->request_size);
 	if (ret < 0)
 		goto error_do_abort;
 
+	if (call->send_pages) {
+		ret = afs_send_pages(call, &msg, iov);
+		if (ret < 0)
+			goto error_do_abort;
+	}
+
 	/* at this point, an async call may no longer exist as it may have
 	 * already completed */
 	return wait_mode->wait(call);
diff --git a/fs/afs/security.c b/fs/afs/security.c
index f9f424d..e0ea88b 100644
--- a/fs/afs/security.c
+++ b/fs/afs/security.c
@@ -109,7 +109,7 @@
 {
 	struct afs_permits *permits;
 
-	_enter("{%x}", vnode->fid.vnode);
+	_enter("{%x:%u}", vnode->fid.vid, vnode->fid.vnode);
 
 	mutex_lock(&vnode->permits_lock);
 	permits = vnode->permits;
@@ -132,7 +132,8 @@
 	struct afs_vnode *auth_vnode;
 	int count, loop;
 
-	_enter("{%x},%x,%lx", vnode->fid.vnode, key_serial(key), acl_order);
+	_enter("{%x:%u},%x,%lx",
+	       vnode->fid.vid, vnode->fid.vnode, key_serial(key), acl_order);
 
 	auth_vnode = afs_get_auth_inode(vnode, key);
 	if (IS_ERR(auth_vnode)) {
@@ -220,7 +221,8 @@
 	bool valid;
 	int loop, ret;
 
-	_enter("");
+	_enter("{%x:%u},%x",
+	       vnode->fid.vid, vnode->fid.vnode, key_serial(key));
 
 	auth_vnode = afs_get_auth_inode(vnode, key);
 	if (IS_ERR(auth_vnode)) {
@@ -268,9 +270,9 @@
 			_leave(" = %d", ret);
 			return ret;
 		}
+		*_access = vnode->status.caller_access;
 	}
 
-	*_access = vnode->status.caller_access;
 	iput(&auth_vnode->vfs_inode);
 	_leave(" = 0 [access %x]", *_access);
 	return 0;
@@ -288,7 +290,7 @@
 	struct key *key;
 	int ret;
 
-	_enter("{{%x:%x},%lx},%x,",
+	_enter("{{%x:%u},%lx},%x,",
 	       vnode->fid.vid, vnode->fid.vnode, vnode->flags, mask);
 
 	key = afs_request_key(vnode->volume->cell);
diff --git a/fs/afs/server.c b/fs/afs/server.c
index 96bb23b..231ae41 100644
--- a/fs/afs/server.c
+++ b/fs/afs/server.c
@@ -252,6 +252,9 @@
 {
 	_enter("%p", server);
 
+	ASSERTIF(server->cb_break_head != server->cb_break_tail,
+		 delayed_work_pending(&server->cb_break_work));
+
 	ASSERTCMP(server->fs_vnodes.rb_node, ==, NULL);
 	ASSERTCMP(server->cb_promises.rb_node, ==, NULL);
 	ASSERTCMP(server->cb_break_head, ==, server->cb_break_tail);
diff --git a/fs/afs/super.c b/fs/afs/super.c
index 7030d76..d24be33 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -50,6 +50,7 @@
 	.statfs		= simple_statfs,
 	.alloc_inode	= afs_alloc_inode,
 	.drop_inode	= generic_delete_inode,
+	.write_inode	= afs_write_inode,
 	.destroy_inode	= afs_destroy_inode,
 	.clear_inode	= afs_clear_inode,
 	.umount_begin	= afs_umount_begin,
@@ -66,7 +67,7 @@
 	afs_opt_vol,
 };
 
-static const match_table_t afs_options_list = {
+static match_table_t afs_options_list = {
 	{ afs_opt_cell,		"cell=%s"	},
 	{ afs_opt_rwpath,	"rwpath"	},
 	{ afs_opt_vol,		"vol=%s"	},
@@ -459,7 +460,9 @@
 		init_waitqueue_head(&vnode->update_waitq);
 		mutex_init(&vnode->permits_lock);
 		mutex_init(&vnode->validate_lock);
+		spin_lock_init(&vnode->writeback_lock);
 		spin_lock_init(&vnode->lock);
+		INIT_LIST_HEAD(&vnode->writebacks);
 		INIT_WORK(&vnode->cb_broken_work, afs_broken_callback_work);
 	}
 }
diff --git a/fs/afs/vnode.c b/fs/afs/vnode.c
index a1904ab..ec81466 100644
--- a/fs/afs/vnode.c
+++ b/fs/afs/vnode.c
@@ -261,7 +261,7 @@
 
 	DECLARE_WAITQUEUE(myself, current);
 
-	_enter("%s,{%u,%u,%u}",
+	_enter("%s,{%x:%u.%u}",
 	       vnode->volume->vlocation->vldb.name,
 	       vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
 
@@ -389,7 +389,7 @@
 	struct afs_server *server;
 	int ret;
 
-	_enter("%s{%u,%u,%u},%x,,,",
+	_enter("%s{%x:%u.%u},%x,,,",
 	       vnode->volume->vlocation->vldb.name,
 	       vnode->fid.vid,
 	       vnode->fid.vnode,
@@ -446,7 +446,7 @@
 	struct afs_server *server;
 	int ret;
 
-	_enter("%s{%u,%u,%u},%x,%s,,",
+	_enter("%s{%x:%u.%u},%x,%s,,",
 	       vnode->volume->vlocation->vldb.name,
 	       vnode->fid.vid,
 	       vnode->fid.vnode,
@@ -502,7 +502,7 @@
 	struct afs_server *server;
 	int ret;
 
-	_enter("%s{%u,%u,%u},%x,%s",
+	_enter("%s{%x:%u.%u},%x,%s",
 	       vnode->volume->vlocation->vldb.name,
 	       vnode->fid.vid,
 	       vnode->fid.vnode,
@@ -557,7 +557,7 @@
 	struct afs_server *server;
 	int ret;
 
-	_enter("%s{%u,%u,%u},%s{%u,%u,%u},%x,%s",
+	_enter("%s{%x:%u.%u},%s{%x:%u.%u},%x,%s",
 	       dvnode->volume->vlocation->vldb.name,
 	       dvnode->fid.vid,
 	       dvnode->fid.vnode,
@@ -628,7 +628,7 @@
 	struct afs_server *server;
 	int ret;
 
-	_enter("%s{%u,%u,%u},%x,%s,%s,,,",
+	_enter("%s{%x:%u.%u},%x,%s,%s,,,",
 	       vnode->volume->vlocation->vldb.name,
 	       vnode->fid.vid,
 	       vnode->fid.vnode,
@@ -687,7 +687,7 @@
 	struct afs_server *server;
 	int ret;
 
-	_enter("%s{%u,%u,%u},%s{%u,%u,%u},%x,%s,%s",
+	_enter("%s{%x:%u.%u},%s{%u,%u,%u},%x,%s,%s",
 	       orig_dvnode->volume->vlocation->vldb.name,
 	       orig_dvnode->fid.vid,
 	       orig_dvnode->fid.vnode,
@@ -753,3 +753,110 @@
 	_leave(" = %ld [cnt %d]", PTR_ERR(server), orig_dvnode->update_cnt);
 	return PTR_ERR(server);
 }
+
+/*
+ * write to a file
+ */
+int afs_vnode_store_data(struct afs_writeback *wb, pgoff_t first, pgoff_t last,
+			 unsigned offset, unsigned to)
+{
+	struct afs_server *server;
+	struct afs_vnode *vnode = wb->vnode;
+	int ret;
+
+	_enter("%s{%x:%u.%u},%x,%lx,%lx,%x,%x",
+	       vnode->volume->vlocation->vldb.name,
+	       vnode->fid.vid,
+	       vnode->fid.vnode,
+	       vnode->fid.unique,
+	       key_serial(wb->key),
+	       first, last, offset, to);
+
+	/* this op will fetch the status */
+	spin_lock(&vnode->lock);
+	vnode->update_cnt++;
+	spin_unlock(&vnode->lock);
+
+	do {
+		/* pick a server to query */
+		server = afs_volume_pick_fileserver(vnode);
+		if (IS_ERR(server))
+			goto no_server;
+
+		_debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+		ret = afs_fs_store_data(server, wb, first, last, offset, to,
+					&afs_sync_call);
+
+	} while (!afs_volume_release_fileserver(vnode, server, ret));
+
+	/* adjust the flags */
+	if (ret == 0) {
+		afs_vnode_finalise_status_update(vnode, server);
+		afs_put_server(server);
+	} else {
+		afs_vnode_status_update_failed(vnode, ret);
+	}
+
+	_leave(" = %d", ret);
+	return ret;
+
+no_server:
+	spin_lock(&vnode->lock);
+	vnode->update_cnt--;
+	ASSERTCMP(vnode->update_cnt, >=, 0);
+	spin_unlock(&vnode->lock);
+	return PTR_ERR(server);
+}
+
+/*
+ * set the attributes on a file
+ */
+int afs_vnode_setattr(struct afs_vnode *vnode, struct key *key,
+		      struct iattr *attr)
+{
+	struct afs_server *server;
+	int ret;
+
+	_enter("%s{%x:%u.%u},%x",
+	       vnode->volume->vlocation->vldb.name,
+	       vnode->fid.vid,
+	       vnode->fid.vnode,
+	       vnode->fid.unique,
+	       key_serial(key));
+
+	/* this op will fetch the status */
+	spin_lock(&vnode->lock);
+	vnode->update_cnt++;
+	spin_unlock(&vnode->lock);
+
+	do {
+		/* pick a server to query */
+		server = afs_volume_pick_fileserver(vnode);
+		if (IS_ERR(server))
+			goto no_server;
+
+		_debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
+
+		ret = afs_fs_setattr(server, key, vnode, attr, &afs_sync_call);
+
+	} while (!afs_volume_release_fileserver(vnode, server, ret));
+
+	/* adjust the flags */
+	if (ret == 0) {
+		afs_vnode_finalise_status_update(vnode, server);
+		afs_put_server(server);
+	} else {
+		afs_vnode_status_update_failed(vnode, ret);
+	}
+
+	_leave(" = %d", ret);
+	return ret;
+
+no_server:
+	spin_lock(&vnode->lock);
+	vnode->update_cnt--;
+	ASSERTCMP(vnode->update_cnt, >=, 0);
+	spin_unlock(&vnode->lock);
+	return PTR_ERR(server);
+}
diff --git a/fs/afs/write.c b/fs/afs/write.c
new file mode 100644
index 0000000..83ff292
--- /dev/null
+++ b/fs/afs/write.c
@@ -0,0 +1,835 @@
+/* handling of writes to regular files and writing back to the server
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+#include <linux/writeback.h>
+#include <linux/pagevec.h>
+#include "internal.h"
+
+static int afs_write_back_from_locked_page(struct afs_writeback *wb,
+					   struct page *page);
+
+/*
+ * mark a page as having been made dirty and thus needing writeback
+ */
+int afs_set_page_dirty(struct page *page)
+{
+	_enter("");
+	return __set_page_dirty_nobuffers(page);
+}
+
+/*
+ * unlink a writeback record because its usage has reached zero
+ * - must be called with the wb->vnode->writeback_lock held
+ */
+static void afs_unlink_writeback(struct afs_writeback *wb)
+{
+	struct afs_writeback *front;
+	struct afs_vnode *vnode = wb->vnode;
+
+	list_del_init(&wb->link);
+	if (!list_empty(&vnode->writebacks)) {
+		/* if an fsync rises to the front of the queue then wake it
+		 * up */
+		front = list_entry(vnode->writebacks.next,
+				   struct afs_writeback, link);
+		if (front->state == AFS_WBACK_SYNCING) {
+			_debug("wake up sync");
+			front->state = AFS_WBACK_COMPLETE;
+			wake_up(&front->waitq);
+		}
+	}
+}
+
+/*
+ * free a writeback record
+ */
+static void afs_free_writeback(struct afs_writeback *wb)
+{
+	_enter("");
+	key_put(wb->key);
+	kfree(wb);
+}
+
+/*
+ * dispose of a reference to a writeback record
+ */
+void afs_put_writeback(struct afs_writeback *wb)
+{
+	struct afs_vnode *vnode = wb->vnode;
+
+	_enter("{%d}", wb->usage);
+
+	spin_lock(&vnode->writeback_lock);
+	if (--wb->usage == 0)
+		afs_unlink_writeback(wb);
+	else
+		wb = NULL;
+	spin_unlock(&vnode->writeback_lock);
+	if (wb)
+		afs_free_writeback(wb);
+}
+
+/*
+ * partly or wholly fill a page that's under preparation for writing
+ */
+static int afs_fill_page(struct afs_vnode *vnode, struct key *key,
+			 unsigned start, unsigned len, struct page *page)
+{
+	int ret;
+
+	_enter(",,%u,%u", start, len);
+
+	ASSERTCMP(start + len, <=, PAGE_SIZE);
+
+	ret = afs_vnode_fetch_data(vnode, key, start, len, page);
+	if (ret < 0) {
+		if (ret == -ENOENT) {
+			_debug("got NOENT from server"
+			       " - marking file deleted and stale");
+			set_bit(AFS_VNODE_DELETED, &vnode->flags);
+			ret = -ESTALE;
+		}
+	}
+
+	_leave(" = %d", ret);
+	return ret;
+}
+
+/*
+ * prepare a page for being written to
+ */
+static int afs_prepare_page(struct afs_vnode *vnode, struct page *page,
+			    struct key *key, unsigned offset, unsigned to)
+{
+	unsigned eof, tail, start, stop, len;
+	loff_t i_size, pos;
+	void *p;
+	int ret;
+
+	_enter("");
+
+	if (offset == 0 && to == PAGE_SIZE)
+		return 0;
+
+	p = kmap(page);
+
+	i_size = i_size_read(&vnode->vfs_inode);
+	pos = (loff_t) page->index << PAGE_SHIFT;
+	if (pos >= i_size) {
+		/* partial write, page beyond EOF */
+		_debug("beyond");
+		if (offset > 0)
+			memset(p, 0, offset);
+		if (to < PAGE_SIZE)
+			memset(p + to, 0, PAGE_SIZE - to);
+		kunmap(page);
+		return 0;
+	}
+
+	if (i_size - pos >= PAGE_SIZE) {
+		/* partial write, page entirely before EOF */
+		_debug("before");
+		tail = eof = PAGE_SIZE;
+	} else {
+		/* partial write, page overlaps EOF */
+		eof = i_size - pos;
+		_debug("overlap %u", eof);
+		tail = max(eof, to);
+		if (tail < PAGE_SIZE)
+			memset(p + tail, 0, PAGE_SIZE - tail);
+		if (offset > eof)
+			memset(p + eof, 0, PAGE_SIZE - eof);
+	}
+
+	kunmap(p);
+
+	ret = 0;
+	if (offset > 0 || eof > to) {
+		/* need to fill one or two bits that aren't going to be written
+		 * (cover both fillers in one read if there are two) */
+		start = (offset > 0) ? 0 : to;
+		stop = (eof > to) ? eof : offset;
+		len = stop - start;
+		_debug("wr=%u-%u av=0-%u rd=%u@%u",
+		       offset, to, eof, start, len);
+		ret = afs_fill_page(vnode, key, start, len, page);
+	}
+
+	_leave(" = %d", ret);
+	return ret;
+}
+
+/*
+ * prepare to perform part of a write to a page
+ * - the caller holds the page locked, preventing it from being written out or
+ *   modified by anyone else
+ */
+int afs_prepare_write(struct file *file, struct page *page,
+		      unsigned offset, unsigned to)
+{
+	struct afs_writeback *candidate, *wb;
+	struct afs_vnode *vnode = AFS_FS_I(file->f_dentry->d_inode);
+	struct key *key = file->private_data;
+	pgoff_t index;
+	int ret;
+
+	_enter("{%x:%u},{%lx},%u,%u",
+	       vnode->fid.vid, vnode->fid.vnode, page->index, offset, to);
+
+	candidate = kzalloc(sizeof(*candidate), GFP_KERNEL);
+	if (!candidate)
+		return -ENOMEM;
+	candidate->vnode = vnode;
+	candidate->first = candidate->last = page->index;
+	candidate->offset_first = offset;
+	candidate->to_last = to;
+	candidate->usage = 1;
+	candidate->state = AFS_WBACK_PENDING;
+	init_waitqueue_head(&candidate->waitq);
+
+	if (!PageUptodate(page)) {
+		_debug("not up to date");
+		ret = afs_prepare_page(vnode, page, key, offset, to);
+		if (ret < 0) {
+			kfree(candidate);
+			_leave(" = %d [prep]", ret);
+			return ret;
+		}
+		SetPageUptodate(page);
+	}
+
+try_again:
+	index = page->index;
+	spin_lock(&vnode->writeback_lock);
+
+	/* see if this page is already pending a writeback under a suitable key
+	 * - if so we can just join onto that one */
+	wb = (struct afs_writeback *) page_private(page);
+	if (wb) {
+		if (wb->key == key && wb->state == AFS_WBACK_PENDING)
+			goto subsume_in_current_wb;
+		goto flush_conflicting_wb;
+	}
+
+	if (index > 0) {
+		/* see if we can find an already pending writeback that we can
+		 * append this page to */
+		list_for_each_entry(wb, &vnode->writebacks, link) {
+			if (wb->last == index - 1 && wb->key == key &&
+			    wb->state == AFS_WBACK_PENDING)
+				goto append_to_previous_wb;
+		}
+	}
+
+	list_add_tail(&candidate->link, &vnode->writebacks);
+	candidate->key = key_get(key);
+	spin_unlock(&vnode->writeback_lock);
+	SetPagePrivate(page);
+	set_page_private(page, (unsigned long) candidate);
+	_leave(" = 0 [new]");
+	return 0;
+
+subsume_in_current_wb:
+	_debug("subsume");
+	ASSERTRANGE(wb->first, <=, index, <=, wb->last);
+	if (index == wb->first && offset < wb->offset_first)
+		wb->offset_first = offset;
+	if (index == wb->last && to > wb->to_last)
+		wb->to_last = to;
+	spin_unlock(&vnode->writeback_lock);
+	kfree(candidate);
+	_leave(" = 0 [sub]");
+	return 0;
+
+append_to_previous_wb:
+	_debug("append into %lx-%lx", wb->first, wb->last);
+	wb->usage++;
+	wb->last++;
+	wb->to_last = to;
+	spin_unlock(&vnode->writeback_lock);
+	SetPagePrivate(page);
+	set_page_private(page, (unsigned long) wb);
+	kfree(candidate);
+	_leave(" = 0 [app]");
+	return 0;
+
+	/* the page is currently bound to another context, so if it's dirty we
+	 * need to flush it before we can use the new context */
+flush_conflicting_wb:
+	_debug("flush conflict");
+	if (wb->state == AFS_WBACK_PENDING)
+		wb->state = AFS_WBACK_CONFLICTING;
+	spin_unlock(&vnode->writeback_lock);
+	if (PageDirty(page)) {
+		ret = afs_write_back_from_locked_page(wb, page);
+		if (ret < 0) {
+			afs_put_writeback(candidate);
+			_leave(" = %d", ret);
+			return ret;
+		}
+	}
+
+	/* the page holds a ref on the writeback record */
+	afs_put_writeback(wb);
+	set_page_private(page, 0);
+	ClearPagePrivate(page);
+	goto try_again;
+}
+
+/*
+ * finalise part of a write to a page
+ */
+int afs_commit_write(struct file *file, struct page *page,
+		     unsigned offset, unsigned to)
+{
+	struct afs_vnode *vnode = AFS_FS_I(file->f_dentry->d_inode);
+	loff_t i_size, maybe_i_size;
+
+	_enter("{%x:%u},{%lx},%u,%u",
+	       vnode->fid.vid, vnode->fid.vnode, page->index, offset, to);
+
+	maybe_i_size = (loff_t) page->index << PAGE_SHIFT;
+	maybe_i_size += to;
+
+	i_size = i_size_read(&vnode->vfs_inode);
+	if (maybe_i_size > i_size) {
+		spin_lock(&vnode->writeback_lock);
+		i_size = i_size_read(&vnode->vfs_inode);
+		if (maybe_i_size > i_size)
+			i_size_write(&vnode->vfs_inode, maybe_i_size);
+		spin_unlock(&vnode->writeback_lock);
+	}
+
+	set_page_dirty(page);
+
+	if (PageDirty(page))
+		_debug("dirtied");
+
+	return 0;
+}
+
+/*
+ * kill all the pages in the given range
+ */
+static void afs_kill_pages(struct afs_vnode *vnode, bool error,
+			   pgoff_t first, pgoff_t last)
+{
+	struct pagevec pv;
+	unsigned count, loop;
+
+	_enter("{%x:%u},%lx-%lx",
+	       vnode->fid.vid, vnode->fid.vnode, first, last);
+
+	pagevec_init(&pv, 0);
+
+	do {
+		_debug("kill %lx-%lx", first, last);
+
+		count = last - first + 1;
+		if (count > PAGEVEC_SIZE)
+			count = PAGEVEC_SIZE;
+		pv.nr = find_get_pages_contig(vnode->vfs_inode.i_mapping,
+					      first, count, pv.pages);
+		ASSERTCMP(pv.nr, ==, count);
+
+		for (loop = 0; loop < count; loop++) {
+			ClearPageUptodate(pv.pages[loop]);
+			if (error)
+				SetPageError(pv.pages[loop]);
+			end_page_writeback(pv.pages[loop]);
+		}
+
+		__pagevec_release(&pv);
+	} while (first < last);
+
+	_leave("");
+}
+
+/*
+ * synchronously write back the locked page and any subsequent non-locked dirty
+ * pages also covered by the same writeback record
+ */
+static int afs_write_back_from_locked_page(struct afs_writeback *wb,
+					   struct page *primary_page)
+{
+	struct page *pages[8], *page;
+	unsigned long count;
+	unsigned n, offset, to;
+	pgoff_t start, first, last;
+	int loop, ret;
+
+	_enter(",%lx", primary_page->index);
+
+	count = 1;
+	if (!clear_page_dirty_for_io(primary_page))
+		BUG();
+	if (test_set_page_writeback(primary_page))
+		BUG();
+
+	/* find all consecutive lockable dirty pages, stopping when we find a
+	 * page that is not immediately lockable, is not dirty or is missing,
+	 * or we reach the end of the range */
+	start = primary_page->index;
+	if (start >= wb->last)
+		goto no_more;
+	start++;
+	do {
+		_debug("more %lx [%lx]", start, count);
+		n = wb->last - start + 1;
+		if (n > ARRAY_SIZE(pages))
+			n = ARRAY_SIZE(pages);
+		n = find_get_pages_contig(wb->vnode->vfs_inode.i_mapping,
+					  start, n, pages);
+		_debug("fgpc %u", n);
+		if (n == 0)
+			goto no_more;
+		if (pages[0]->index != start) {
+			for (n--; n >= 0; n--)
+				put_page(pages[n]);
+			goto no_more;
+		}
+
+		for (loop = 0; loop < n; loop++) {
+			page = pages[loop];
+			if (page->index > wb->last)
+				break;
+			if (TestSetPageLocked(page))
+				break;
+			if (!PageDirty(page) ||
+			    page_private(page) != (unsigned long) wb) {
+				unlock_page(page);
+				break;
+			}
+			if (!clear_page_dirty_for_io(page))
+				BUG();
+			if (test_set_page_writeback(page))
+				BUG();
+			unlock_page(page);
+			put_page(page);
+		}
+		count += loop;
+		if (loop < n) {
+			for (; loop < n; loop++)
+				put_page(pages[loop]);
+			goto no_more;
+		}
+
+		start += loop;
+	} while (start <= wb->last && count < 65536);
+
+no_more:
+	/* we now have a contiguous set of dirty pages, each with writeback set
+	 * and the dirty mark cleared; the first page is locked and must remain
+	 * so, all the rest are unlocked */
+	first = primary_page->index;
+	last = first + count - 1;
+
+	offset = (first == wb->first) ? wb->offset_first : 0;
+	to = (last == wb->last) ? wb->to_last : PAGE_SIZE;
+
+	_debug("write back %lx[%u..] to %lx[..%u]", first, offset, last, to);
+
+	ret = afs_vnode_store_data(wb, first, last, offset, to);
+	if (ret < 0) {
+		switch (ret) {
+		case -EDQUOT:
+		case -ENOSPC:
+			set_bit(AS_ENOSPC,
+				&wb->vnode->vfs_inode.i_mapping->flags);
+			break;
+		case -EROFS:
+		case -EIO:
+		case -EREMOTEIO:
+		case -EFBIG:
+		case -ENOENT:
+		case -ENOMEDIUM:
+		case -ENXIO:
+			afs_kill_pages(wb->vnode, true, first, last);
+			set_bit(AS_EIO, &wb->vnode->vfs_inode.i_mapping->flags);
+			break;
+		case -EACCES:
+		case -EPERM:
+		case -ENOKEY:
+		case -EKEYEXPIRED:
+		case -EKEYREJECTED:
+		case -EKEYREVOKED:
+			afs_kill_pages(wb->vnode, false, first, last);
+			break;
+		default:
+			break;
+		}
+	} else {
+		ret = count;
+	}
+
+	_leave(" = %d", ret);
+	return ret;
+}
+
+/*
+ * write a page back to the server
+ * - the caller locked the page for us
+ */
+int afs_writepage(struct page *page, struct writeback_control *wbc)
+{
+	struct backing_dev_info *bdi = page->mapping->backing_dev_info;
+	struct afs_writeback *wb;
+	int ret;
+
+	_enter("{%lx},", page->index);
+
+	if (wbc->sync_mode != WB_SYNC_NONE)
+		wait_on_page_writeback(page);
+
+	if (PageWriteback(page) || !PageDirty(page)) {
+		unlock_page(page);
+		return 0;
+	}
+
+	wb = (struct afs_writeback *) page_private(page);
+	ASSERT(wb != NULL);
+
+	ret = afs_write_back_from_locked_page(wb, page);
+	unlock_page(page);
+	if (ret < 0) {
+		_leave(" = %d", ret);
+		return 0;
+	}
+
+	wbc->nr_to_write -= ret;
+	if (wbc->nonblocking && bdi_write_congested(bdi))
+		wbc->encountered_congestion = 1;
+
+	_leave(" = 0");
+	return 0;
+}
+
+/*
+ * write a region of pages back to the server
+ */
+int afs_writepages_region(struct address_space *mapping,
+			  struct writeback_control *wbc,
+			  pgoff_t index, pgoff_t end, pgoff_t *_next)
+{
+	struct backing_dev_info *bdi = mapping->backing_dev_info;
+	struct afs_writeback *wb;
+	struct page *page;
+	int ret, n;
+
+	_enter(",,%lx,%lx,", index, end);
+
+	do {
+		n = find_get_pages_tag(mapping, &index, PAGECACHE_TAG_DIRTY,
+				       1, &page);
+		if (!n)
+			break;
+
+		_debug("wback %lx", page->index);
+
+		if (page->index > end) {
+			*_next = index;
+			page_cache_release(page);
+			_leave(" = 0 [%lx]", *_next);
+			return 0;
+		}
+
+		/* at this point we hold neither mapping->tree_lock nor lock on
+		 * the page itself: the page may be truncated or invalidated
+		 * (changing page->mapping to NULL), or even swizzled back from
+		 * swapper_space to tmpfs file mapping
+		 */
+		lock_page(page);
+
+		if (page->mapping != mapping) {
+			unlock_page(page);
+			page_cache_release(page);
+			continue;
+		}
+
+		if (wbc->sync_mode != WB_SYNC_NONE)
+			wait_on_page_writeback(page);
+
+		if (PageWriteback(page) || !PageDirty(page)) {
+			unlock_page(page);
+			continue;
+		}
+
+		wb = (struct afs_writeback *) page_private(page);
+		ASSERT(wb != NULL);
+
+		spin_lock(&wb->vnode->writeback_lock);
+		wb->state = AFS_WBACK_WRITING;
+		spin_unlock(&wb->vnode->writeback_lock);
+
+		ret = afs_write_back_from_locked_page(wb, page);
+		unlock_page(page);
+		page_cache_release(page);
+		if (ret < 0) {
+			_leave(" = %d", ret);
+			return ret;
+		}
+
+		wbc->nr_to_write -= ret;
+
+		if (wbc->nonblocking && bdi_write_congested(bdi)) {
+			wbc->encountered_congestion = 1;
+			break;
+		}
+
+		cond_resched();
+	} while (index < end && wbc->nr_to_write > 0);
+
+	*_next = index;
+	_leave(" = 0 [%lx]", *_next);
+	return 0;
+}
+
+/*
+ * write some of the pending data back to the server
+ */
+int afs_writepages(struct address_space *mapping,
+		   struct writeback_control *wbc)
+{
+	struct backing_dev_info *bdi = mapping->backing_dev_info;
+	pgoff_t start, end, next;
+	int ret;
+
+	_enter("");
+
+	if (wbc->nonblocking && bdi_write_congested(bdi)) {
+		wbc->encountered_congestion = 1;
+		_leave(" = 0 [congest]");
+		return 0;
+	}
+
+	if (wbc->range_cyclic) {
+		start = mapping->writeback_index;
+		end = -1;
+		ret = afs_writepages_region(mapping, wbc, start, end, &next);
+		if (start > 0 && wbc->nr_to_write > 0 && ret == 0 &&
+		    !(wbc->nonblocking && wbc->encountered_congestion))
+			ret = afs_writepages_region(mapping, wbc, 0, start,
+						    &next);
+		mapping->writeback_index = next;
+	} else if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) {
+		end = (pgoff_t)(LLONG_MAX >> PAGE_CACHE_SHIFT);
+		ret = afs_writepages_region(mapping, wbc, 0, end, &next);
+		if (wbc->nr_to_write > 0)
+			mapping->writeback_index = next;
+	} else {
+		start = wbc->range_start >> PAGE_CACHE_SHIFT;
+		end = wbc->range_end >> PAGE_CACHE_SHIFT;
+		ret = afs_writepages_region(mapping, wbc, start, end, &next);
+	}
+
+	_leave(" = %d", ret);
+	return ret;
+}
+
+/*
+ * write an inode back
+ */
+int afs_write_inode(struct inode *inode, int sync)
+{
+	struct afs_vnode *vnode = AFS_FS_I(inode);
+	int ret;
+
+	_enter("{%x:%u},", vnode->fid.vid, vnode->fid.vnode);
+
+	ret = 0;
+	if (sync) {
+		ret = filemap_fdatawait(inode->i_mapping);
+		if (ret < 0)
+			__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
+	}
+
+	_leave(" = %d", ret);
+	return ret;
+}
+
+/*
+ * completion of write to server
+ */
+void afs_pages_written_back(struct afs_vnode *vnode, struct afs_call *call)
+{
+	struct afs_writeback *wb = call->wb;
+	struct pagevec pv;
+	unsigned count, loop;
+	pgoff_t first = call->first, last = call->last;
+	bool free_wb;
+
+	_enter("{%x:%u},{%lx-%lx}",
+	       vnode->fid.vid, vnode->fid.vnode, first, last);
+
+	ASSERT(wb != NULL);
+
+	pagevec_init(&pv, 0);
+
+	do {
+		_debug("attach %lx-%lx", first, last);
+
+		count = last - first + 1;
+		if (count > PAGEVEC_SIZE)
+			count = PAGEVEC_SIZE;
+		pv.nr = find_get_pages_contig(call->mapping, first, count,
+					      pv.pages);
+		ASSERTCMP(pv.nr, ==, count);
+
+		spin_lock(&vnode->writeback_lock);
+		for (loop = 0; loop < count; loop++) {
+			struct page *page = pv.pages[loop];
+			end_page_writeback(page);
+			if (page_private(page) == (unsigned long) wb) {
+				set_page_private(page, 0);
+				ClearPagePrivate(page);
+				wb->usage--;
+			}
+		}
+		free_wb = false;
+		if (wb->usage == 0) {
+			afs_unlink_writeback(wb);
+			free_wb = true;
+		}
+		spin_unlock(&vnode->writeback_lock);
+		first += count;
+		if (free_wb) {
+			afs_free_writeback(wb);
+			wb = NULL;
+		}
+
+		__pagevec_release(&pv);
+	} while (first < last);
+
+	_leave("");
+}
+
+/*
+ * write to an AFS file
+ */
+ssize_t afs_file_write(struct kiocb *iocb, const struct iovec *iov,
+		       unsigned long nr_segs, loff_t pos)
+{
+	struct dentry *dentry = iocb->ki_filp->f_path.dentry;
+	struct afs_vnode *vnode = AFS_FS_I(dentry->d_inode);
+	ssize_t result;
+	size_t count = iov_length(iov, nr_segs);
+	int ret;
+
+	_enter("{%x.%u},{%zu},%lu,",
+	       vnode->fid.vid, vnode->fid.vnode, count, nr_segs);
+
+	if (IS_SWAPFILE(&vnode->vfs_inode)) {
+		printk(KERN_INFO
+		       "AFS: Attempt to write to active swap file!\n");
+		return -EBUSY;
+	}
+
+	if (!count)
+		return 0;
+
+	result = generic_file_aio_write(iocb, iov, nr_segs, pos);
+	if (IS_ERR_VALUE(result)) {
+		_leave(" = %zd", result);
+		return result;
+	}
+
+	/* return error values for O_SYNC and IS_SYNC() */
+	if (IS_SYNC(&vnode->vfs_inode) || iocb->ki_filp->f_flags & O_SYNC) {
+		ret = afs_fsync(iocb->ki_filp, dentry, 1);
+		if (ret < 0)
+			result = ret;
+	}
+
+	_leave(" = %zd", result);
+	return result;
+}
+
+/*
+ * flush the vnode to the fileserver
+ */
+int afs_writeback_all(struct afs_vnode *vnode)
+{
+	struct address_space *mapping = vnode->vfs_inode.i_mapping;
+	struct writeback_control wbc = {
+		.bdi		= mapping->backing_dev_info,
+		.sync_mode	= WB_SYNC_ALL,
+		.nr_to_write	= LONG_MAX,
+		.for_writepages = 1,
+		.range_cyclic	= 1,
+	};
+	int ret;
+
+	_enter("");
+
+	ret = mapping->a_ops->writepages(mapping, &wbc);
+	__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
+
+	_leave(" = %d", ret);
+	return ret;
+}
+
+/*
+ * flush any dirty pages for this process, and check for write errors.
+ * - the return status from this call provides a reliable indication of
+ *   whether any write errors occurred for this process.
+ */
+int afs_fsync(struct file *file, struct dentry *dentry, int datasync)
+{
+	struct afs_writeback *wb, *xwb;
+	struct afs_vnode *vnode = AFS_FS_I(dentry->d_inode);
+	int ret;
+
+	_enter("{%x:%u},{n=%s},%d",
+	       vnode->fid.vid, vnode->fid.vnode, dentry->d_name.name,
+	       datasync);
+
+	/* use a writeback record as a marker in the queue - when this reaches
+	 * the front of the queue, all the outstanding writes are either
+	 * completed or rejected */
+	wb = kzalloc(sizeof(*wb), GFP_KERNEL);
+	if (!wb)
+		return -ENOMEM;
+	wb->vnode = vnode;
+	wb->first = 0;
+	wb->last = -1;
+	wb->offset_first = 0;
+	wb->to_last = PAGE_SIZE;
+	wb->usage = 1;
+	wb->state = AFS_WBACK_SYNCING;
+	init_waitqueue_head(&wb->waitq);
+
+	spin_lock(&vnode->writeback_lock);
+	list_for_each_entry(xwb, &vnode->writebacks, link) {
+		if (xwb->state == AFS_WBACK_PENDING)
+			xwb->state = AFS_WBACK_CONFLICTING;
+	}
+	list_add_tail(&wb->link, &vnode->writebacks);
+	spin_unlock(&vnode->writeback_lock);
+
+	/* push all the outstanding writebacks to the server */
+	ret = afs_writeback_all(vnode);
+	if (ret < 0) {
+		afs_put_writeback(wb);
+		_leave(" = %d [wb]", ret);
+		return ret;
+	}
+
+	/* wait for the preceding writes to actually complete */
+	ret = wait_event_interruptible(wb->waitq,
+				       wb->state == AFS_WBACK_COMPLETE ||
+				       vnode->writebacks.next == &wb->link);
+	afs_put_writeback(wb);
+	_leave(" = %d", ret);
+	return ret;
+}
diff --git a/fs/aio.c b/fs/aio.c
index b97ab80..ac1c158 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -346,10 +346,9 @@
 
 		wait_for_all_aios(ctx);
 		/*
-		 * this is an overkill, but ensures we don't leave
-		 * the ctx on the aio_wq
+		 * Ensure we don't leave the ctx on the aio_wq
 		 */
-		flush_workqueue(aio_wq);
+		cancel_work_sync(&ctx->wq.work);
 
 		if (1 != atomic_read(&ctx->users))
 			printk(KERN_DEBUG
@@ -372,7 +371,7 @@
 	BUG_ON(ctx->reqs_active);
 
 	cancel_delayed_work(&ctx->wq);
-	flush_workqueue(aio_wq);
+	cancel_work_sync(&ctx->wq.work);
 	aio_free_ring(ctx);
 	mmdrop(ctx->mm);
 	ctx->mm = NULL;
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 18657f0..72d0b41 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -675,19 +675,8 @@
 bm_status_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
 {
 	char *s = enabled ? "enabled" : "disabled";
-	int len = strlen(s);
-	loff_t pos = *ppos;
 
-	if (pos < 0)
-		return -EINVAL;
-	if (pos >= len)
-		return 0;
-	if (len < pos + nbytes)
-		nbytes = len - pos;
-	if (copy_to_user(buf, s + pos, nbytes))
-		return -EFAULT;
-	*ppos = pos + nbytes;
-	return nbytes;
+	return simple_read_from_buffer(buf, nbytes, ppos, s, strlen(s));
 }
 
 static ssize_t bm_status_write(struct file * file, const char __user * buffer,
diff --git a/fs/buffer.c b/fs/buffer.c
index eb820b8..aecd057 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1846,13 +1846,8 @@
 		if (block_start >= to)
 			break;
 		if (buffer_new(bh)) {
-			void *kaddr;
-
 			clear_buffer_new(bh);
-			kaddr = kmap_atomic(page, KM_USER0);
-			memset(kaddr+block_start, 0, bh->b_size);
-			flush_dcache_page(page);
-			kunmap_atomic(kaddr, KM_USER0);
+			zero_user_page(page, block_start, bh->b_size, KM_USER0);
 			set_buffer_uptodate(bh);
 			mark_buffer_dirty(bh);
 		}
@@ -1940,10 +1935,8 @@
 					SetPageError(page);
 			}
 			if (!buffer_mapped(bh)) {
-				void *kaddr = kmap_atomic(page, KM_USER0);
-				memset(kaddr + i * blocksize, 0, blocksize);
-				flush_dcache_page(page);
-				kunmap_atomic(kaddr, KM_USER0);
+				zero_user_page(page, i * blocksize, blocksize,
+						KM_USER0);
 				if (!err)
 					set_buffer_uptodate(bh);
 				continue;
@@ -2086,7 +2079,6 @@
 	long status;
 	unsigned zerofrom;
 	unsigned blocksize = 1 << inode->i_blkbits;
-	void *kaddr;
 
 	while(page->index > (pgpos = *bytes>>PAGE_CACHE_SHIFT)) {
 		status = -ENOMEM;
@@ -2108,10 +2100,8 @@
 						PAGE_CACHE_SIZE, get_block);
 		if (status)
 			goto out_unmap;
-		kaddr = kmap_atomic(new_page, KM_USER0);
-		memset(kaddr+zerofrom, 0, PAGE_CACHE_SIZE-zerofrom);
-		flush_dcache_page(new_page);
-		kunmap_atomic(kaddr, KM_USER0);
+		zero_user_page(page, zerofrom, PAGE_CACHE_SIZE - zerofrom,
+				KM_USER0);
 		generic_commit_write(NULL, new_page, zerofrom, PAGE_CACHE_SIZE);
 		unlock_page(new_page);
 		page_cache_release(new_page);
@@ -2138,10 +2128,7 @@
 	if (status)
 		goto out1;
 	if (zerofrom < offset) {
-		kaddr = kmap_atomic(page, KM_USER0);
-		memset(kaddr+zerofrom, 0, offset-zerofrom);
-		flush_dcache_page(page);
-		kunmap_atomic(kaddr, KM_USER0);
+		zero_user_page(page, zerofrom, offset - zerofrom, KM_USER0);
 		__block_commit_write(inode, page, zerofrom, offset);
 	}
 	return 0;
@@ -2340,10 +2327,7 @@
 	 * Error recovery is pretty slack.  Clear the page and mark it dirty
 	 * so we'll later zero out any blocks which _were_ allocated.
 	 */
-	kaddr = kmap_atomic(page, KM_USER0);
-	memset(kaddr, 0, PAGE_CACHE_SIZE);
-	flush_dcache_page(page);
-	kunmap_atomic(kaddr, KM_USER0);
+	zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
 	SetPageUptodate(page);
 	set_page_dirty(page);
 	return ret;
@@ -2382,7 +2366,6 @@
 	loff_t i_size = i_size_read(inode);
 	const pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT;
 	unsigned offset;
-	void *kaddr;
 	int ret;
 
 	/* Is the page fully inside i_size? */
@@ -2413,10 +2396,7 @@
 	 * the  page size, the remaining memory is zeroed when mapped, and
 	 * writes to that region are not written out to the file."
 	 */
-	kaddr = kmap_atomic(page, KM_USER0);
-	memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
-	flush_dcache_page(page);
-	kunmap_atomic(kaddr, KM_USER0);
+	zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
 out:
 	ret = mpage_writepage(page, get_block, wbc);
 	if (ret == -EAGAIN)
@@ -2437,7 +2417,6 @@
 	unsigned to;
 	struct page *page;
 	const struct address_space_operations *a_ops = mapping->a_ops;
-	char *kaddr;
 	int ret = 0;
 
 	if ((offset & (blocksize - 1)) == 0)
@@ -2451,10 +2430,8 @@
 	to = (offset + blocksize) & ~(blocksize - 1);
 	ret = a_ops->prepare_write(NULL, page, offset, to);
 	if (ret == 0) {
-		kaddr = kmap_atomic(page, KM_USER0);
-		memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
-		flush_dcache_page(page);
-		kunmap_atomic(kaddr, KM_USER0);
+		zero_user_page(page, offset, PAGE_CACHE_SIZE - offset,
+				KM_USER0);
 		/*
 		 * It would be more correct to call aops->commit_write()
 		 * here, but this is more efficient.
@@ -2480,7 +2457,6 @@
 	struct inode *inode = mapping->host;
 	struct page *page;
 	struct buffer_head *bh;
-	void *kaddr;
 	int err;
 
 	blocksize = 1 << inode->i_blkbits;
@@ -2534,11 +2510,7 @@
 			goto unlock;
 	}
 
-	kaddr = kmap_atomic(page, KM_USER0);
-	memset(kaddr + offset, 0, length);
-	flush_dcache_page(page);
-	kunmap_atomic(kaddr, KM_USER0);
-
+	zero_user_page(page, offset, length, KM_USER0);
 	mark_buffer_dirty(bh);
 	err = 0;
 
@@ -2559,7 +2531,6 @@
 	loff_t i_size = i_size_read(inode);
 	const pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT;
 	unsigned offset;
-	void *kaddr;
 
 	/* Is the page fully inside i_size? */
 	if (page->index < end_index)
@@ -2585,10 +2556,7 @@
 	 * the  page size, the remaining memory is zeroed when mapped, and
 	 * writes to that region are not written out to the file."
 	 */
-	kaddr = kmap_atomic(page, KM_USER0);
-	memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
-	flush_dcache_page(page);
-	kunmap_atomic(kaddr, KM_USER0);
+	zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
 	return __block_write_full_page(inode, page, get_block, wbc);
 }
 
@@ -2978,7 +2946,7 @@
 static int buffer_cpu_notify(struct notifier_block *self,
 			      unsigned long action, void *hcpu)
 {
-	if (action == CPU_DEAD)
+	if (action == CPU_DEAD || action == CPU_DEAD_FROZEN)
 		buffer_exit_cpu((unsigned long)hcpu);
 	return NOTIFY_OK;
 }
diff --git a/fs/configfs/file.c b/fs/configfs/file.c
index d98be5e..3527c7c 100644
--- a/fs/configfs/file.c
+++ b/fs/configfs/file.c
@@ -77,36 +77,6 @@
 	return ret;
 }
 
-
-/**
- *	flush_read_buffer - push buffer to userspace.
- *	@buffer:	data buffer for file.
- *	@userbuf:	user-passed buffer.
- *	@count:		number of bytes requested.
- *	@ppos:		file position.
- *
- *	Copy the buffer we filled in fill_read_buffer() to userspace.
- *	This is done at the reader's leisure, copying and advancing
- *	the amount they specify each time.
- *	This may be called continuously until the buffer is empty.
- */
-static int flush_read_buffer(struct configfs_buffer * buffer, char __user * buf,
-			     size_t count, loff_t * ppos)
-{
-	int error;
-
-	if (*ppos > buffer->count)
-		return 0;
-
-	if (count > (buffer->count - *ppos))
-		count = buffer->count - *ppos;
-
-	error = copy_to_user(buf,buffer->page + *ppos,count);
-	if (!error)
-		*ppos += count;
-	return error ? -EFAULT : count;
-}
-
 /**
  *	configfs_read_file - read an attribute.
  *	@file:	file pointer.
@@ -139,7 +109,8 @@
 	}
 	pr_debug("%s: count = %zd, ppos = %lld, buf = %s\n",
 		 __FUNCTION__, count, *ppos, buffer->page);
-	retval = flush_read_buffer(buffer,buf,count,ppos);
+	retval = simple_read_from_buffer(buf, count, ppos, buffer->page,
+					 buffer->count);
 out:
 	up(&buffer->sem);
 	return retval;
diff --git a/fs/direct-io.c b/fs/direct-io.c
index d9d0833..8aa2d8b 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -867,7 +867,6 @@
 do_holes:
 			/* Handle holes */
 			if (!buffer_mapped(map_bh)) {
-				char *kaddr;
 				loff_t i_size_aligned;
 
 				/* AKPM: eargh, -ENOTBLK is a hack */
@@ -888,11 +887,8 @@
 					page_cache_release(page);
 					goto out;
 				}
-				kaddr = kmap_atomic(page, KM_USER0);
-				memset(kaddr + (block_in_page << blkbits),
-						0, 1 << blkbits);
-				flush_dcache_page(page);
-				kunmap_atomic(kaddr, KM_USER0);
+				zero_user_page(page, block_in_page << blkbits,
+						1 << blkbits, KM_USER0);
 				dio->block_in_file++;
 				block_in_page++;
 				goto next_block;
diff --git a/fs/ext3/inode.c b/fs/ext3/inode.c
index e1bb031..a6cb617 100644
--- a/fs/ext3/inode.c
+++ b/fs/ext3/inode.c
@@ -1767,7 +1767,6 @@
 	struct inode *inode = mapping->host;
 	struct buffer_head *bh;
 	int err = 0;
-	void *kaddr;
 
 	blocksize = inode->i_sb->s_blocksize;
 	length = blocksize - (offset & (blocksize - 1));
@@ -1779,10 +1778,7 @@
 	 */
 	if (!page_has_buffers(page) && test_opt(inode->i_sb, NOBH) &&
 	     ext3_should_writeback_data(inode) && PageUptodate(page)) {
-		kaddr = kmap_atomic(page, KM_USER0);
-		memset(kaddr + offset, 0, length);
-		flush_dcache_page(page);
-		kunmap_atomic(kaddr, KM_USER0);
+		zero_user_page(page, offset, length, KM_USER0);
 		set_page_dirty(page);
 		goto unlock;
 	}
@@ -1835,11 +1831,7 @@
 			goto unlock;
 	}
 
-	kaddr = kmap_atomic(page, KM_USER0);
-	memset(kaddr + offset, 0, length);
-	flush_dcache_page(page);
-	kunmap_atomic(kaddr, KM_USER0);
-
+	zero_user_page(page, offset, length, KM_USER0);
 	BUFFER_TRACE(bh, "zeroed end of block");
 
 	err = 0;
diff --git a/fs/mpage.c b/fs/mpage.c
index fa2441f..0fb914f 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -284,11 +284,9 @@
 	}
 
 	if (first_hole != blocks_per_page) {
-		char *kaddr = kmap_atomic(page, KM_USER0);
-		memset(kaddr + (first_hole << blkbits), 0,
-				PAGE_CACHE_SIZE - (first_hole << blkbits));
-		flush_dcache_page(page);
-		kunmap_atomic(kaddr, KM_USER0);
+		zero_user_page(page, first_hole << blkbits,
+				PAGE_CACHE_SIZE - (first_hole << blkbits),
+				KM_USER0);
 		if (first_hole == 0) {
 			SetPageUptodate(page);
 			unlock_page(page);
@@ -576,14 +574,11 @@
 		 * written out to the file."
 		 */
 		unsigned offset = i_size & (PAGE_CACHE_SIZE - 1);
-		char *kaddr;
 
 		if (page->index > end_index || !offset)
 			goto confused;
-		kaddr = kmap_atomic(page, KM_USER0);
-		memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
-		flush_dcache_page(page);
-		kunmap_atomic(kaddr, KM_USER0);
+		zero_user_page(page, offset, PAGE_CACHE_SIZE - offset,
+				KM_USER0);
 	}
 
 	/*
diff --git a/fs/namei.c b/fs/namei.c
index 856b2f5..b3780e3 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1152,14 +1152,12 @@
 
 		fput_light(file, fput_needed);
 	}
-	current->total_link_count = 0;
-	retval = link_path_walk(name, nd);
+
+	retval = path_walk(name, nd);
 out:
-	if (likely(retval == 0)) {
-		if (unlikely(!audit_dummy_context() && nd && nd->dentry &&
+	if (unlikely(!retval && !audit_dummy_context() && nd->dentry &&
 				nd->dentry->d_inode))
 		audit_inode(name, nd->dentry->d_inode);
-	}
 out_fail:
 	return retval;
 
diff --git a/fs/nfsd/Makefile b/fs/nfsd/Makefile
index ce341dc..9b118ee 100644
--- a/fs/nfsd/Makefile
+++ b/fs/nfsd/Makefile
@@ -11,4 +11,3 @@
 nfsd-$(CONFIG_NFSD_V3_ACL) += nfs3acl.o
 nfsd-$(CONFIG_NFSD_V4)	+= nfs4proc.o nfs4xdr.o nfs4state.o nfs4idmap.o \
 			   nfs4acl.o nfs4callback.o nfs4recover.o
-nfsd-objs		:= $(nfsd-y)
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 6f24768..79bd03b 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -469,6 +469,13 @@
 	nd.dentry = NULL;
 	exp.ex_path = NULL;
 
+	/* fs locations */
+	exp.ex_fslocs.locations = NULL;
+	exp.ex_fslocs.locations_count = 0;
+	exp.ex_fslocs.migrated = 0;
+
+	exp.ex_uuid = NULL;
+
 	if (mesg[mlen-1] != '\n')
 		return -EINVAL;
 	mesg[mlen-1] = 0;
@@ -509,13 +516,6 @@
 	if (exp.h.expiry_time == 0)
 		goto out;
 
-	/* fs locations */
-	exp.ex_fslocs.locations = NULL;
-	exp.ex_fslocs.locations_count = 0;
-	exp.ex_fslocs.migrated = 0;
-
-	exp.ex_uuid = NULL;
-
 	/* flags */
 	err = get_int(&mesg, &an_int);
 	if (err == -ENOENT)
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index 7f5bad0..eac8283 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -177,7 +177,7 @@
 	if (max_blocksize < resp->count)
 		resp->count = max_blocksize;
 
-	svc_reserve(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
+	svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
 
 	fh_copy(&resp->fh, &argp->fh);
 	nfserr = nfsd_read(rqstp, &resp->fh, NULL,
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index 7e4bb0a..10f6e7d 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -239,7 +239,7 @@
 encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
 {
 	struct dentry *dentry = fhp->fh_dentry;
-	if (dentry && dentry->d_inode != NULL) {
+	if (dentry && dentry->d_inode) {
 	        int err;
 		struct kstat stat;
 
@@ -300,9 +300,9 @@
 nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
 					struct nfsd3_sattrargs *args)
 {
-	if (!(p = decode_fh(p, &args->fh))
-	 || !(p = decode_sattr3(p, &args->attrs)))
+	if (!(p = decode_fh(p, &args->fh)))
 		return 0;
+	p = decode_sattr3(p, &args->attrs);
 
 	if ((args->check_guard = ntohl(*p++)) != 0) { 
 		struct timespec time; 
@@ -343,9 +343,9 @@
 	int v,pn;
 	u32 max_blocksize = svc_max_payload(rqstp);
 
-	if (!(p = decode_fh(p, &args->fh))
-	 || !(p = xdr_decode_hyper(p, &args->offset)))
+	if (!(p = decode_fh(p, &args->fh)))
 		return 0;
+	p = xdr_decode_hyper(p, &args->offset);
 
 	len = args->count = ntohl(*p++);
 
@@ -369,28 +369,44 @@
 nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
 					struct nfsd3_writeargs *args)
 {
-	unsigned int len, v, hdr;
+	unsigned int len, v, hdr, dlen;
 	u32 max_blocksize = svc_max_payload(rqstp);
 
-	if (!(p = decode_fh(p, &args->fh))
-	 || !(p = xdr_decode_hyper(p, &args->offset)))
+	if (!(p = decode_fh(p, &args->fh)))
 		return 0;
+	p = xdr_decode_hyper(p, &args->offset);
 
 	args->count = ntohl(*p++);
 	args->stable = ntohl(*p++);
 	len = args->len = ntohl(*p++);
-
-	hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
-	if (rqstp->rq_arg.len < hdr ||
-	    rqstp->rq_arg.len - hdr < len)
+	/*
+	 * The count must equal the amount of data passed.
+	 */
+	if (args->count != args->len)
 		return 0;
 
+	/*
+	 * Check to make sure that we got the right number of
+	 * bytes.
+	 */
+	hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
+	dlen = rqstp->rq_arg.head[0].iov_len + rqstp->rq_arg.page_len
+		- hdr;
+	/*
+	 * Round the length of the data which was specified up to
+	 * the next multiple of XDR units and then compare that
+	 * against the length which was actually received.
+	 */
+	if (dlen != XDR_QUADLEN(len)*4)
+		return 0;
+
+	if (args->count > max_blocksize) {
+		args->count = max_blocksize;
+		len = args->len = max_blocksize;
+	}
 	rqstp->rq_vec[0].iov_base = (void*)p;
 	rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len - hdr;
-
-	if (len > max_blocksize)
-		len = max_blocksize;
-	v=  0;
+	v = 0;
 	while (len > rqstp->rq_vec[v].iov_len) {
 		len -= rqstp->rq_vec[v].iov_len;
 		v++;
@@ -398,9 +414,8 @@
 		rqstp->rq_vec[v].iov_len = PAGE_SIZE;
 	}
 	rqstp->rq_vec[v].iov_len = len;
-	args->vlen = v+1;
-
-	return args->count == args->len && rqstp->rq_vec[0].iov_len > 0;
+	args->vlen = v + 1;
+	return 1;
 }
 
 int
@@ -414,8 +429,7 @@
 	switch (args->createmode = ntohl(*p++)) {
 	case NFS3_CREATE_UNCHECKED:
 	case NFS3_CREATE_GUARDED:
-		if (!(p = decode_sattr3(p, &args->attrs)))
-			return 0;
+		p = decode_sattr3(p, &args->attrs);
 		break;
 	case NFS3_CREATE_EXCLUSIVE:
 		args->verf = p;
@@ -431,10 +445,10 @@
 nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p,
 					struct nfsd3_createargs *args)
 {
-	if (!(p = decode_fh(p, &args->fh))
-	 || !(p = decode_filename(p, &args->name, &args->len))
-	 || !(p = decode_sattr3(p, &args->attrs)))
+	if (!(p = decode_fh(p, &args->fh)) ||
+	    !(p = decode_filename(p, &args->name, &args->len)))
 		return 0;
+	p = decode_sattr3(p, &args->attrs);
 
 	return xdr_argsize_check(rqstp, p);
 }
@@ -448,11 +462,12 @@
 	char *old, *new;
 	struct kvec *vec;
 
-	if (!(p = decode_fh(p, &args->ffh))
-	 || !(p = decode_filename(p, &args->fname, &args->flen))
-	 || !(p = decode_sattr3(p, &args->attrs))
+	if (!(p = decode_fh(p, &args->ffh)) ||
+	    !(p = decode_filename(p, &args->fname, &args->flen))
 		)
 		return 0;
+	p = decode_sattr3(p, &args->attrs);
+
 	/* now decode the pathname, which might be larger than the first page.
 	 * As we have to check for nul's anyway, we copy it into a new page
 	 * This page appears in the rq_res.pages list, but as pages_len is always
@@ -502,10 +517,8 @@
 	args->ftype = ntohl(*p++);
 
 	if (args->ftype == NF3BLK  || args->ftype == NF3CHR
-	 || args->ftype == NF3SOCK || args->ftype == NF3FIFO) {
-		if (!(p = decode_sattr3(p, &args->attrs)))
-			return 0;
-	}
+	 || args->ftype == NF3SOCK || args->ftype == NF3FIFO)
+		p = decode_sattr3(p, &args->attrs);
 
 	if (args->ftype == NF3BLK || args->ftype == NF3CHR) {
 		args->major = ntohl(*p++);
diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c
index 673a53c..cc3b7ba 100644
--- a/fs/nfsd/nfs4acl.c
+++ b/fs/nfsd/nfs4acl.c
@@ -137,7 +137,6 @@
 static short ace2type(struct nfs4_ace *);
 static void _posix_to_nfsv4_one(struct posix_acl *, struct nfs4_acl *,
 				unsigned int);
-void nfs4_acl_add_ace(struct nfs4_acl *, u32, u32, u32, int, uid_t);
 
 struct nfs4_acl *
 nfs4_acl_posix_to_nfsv4(struct posix_acl *pacl, struct posix_acl *dpacl,
@@ -785,21 +784,6 @@
 	return acl;
 }
 
-void
-nfs4_acl_add_ace(struct nfs4_acl *acl, u32 type, u32 flag, u32 access_mask,
-		int whotype, uid_t who)
-{
-	struct nfs4_ace *ace = acl->aces + acl->naces;
-
-	ace->type = type;
-	ace->flag = flag;
-	ace->access_mask = access_mask;
-	ace->whotype = whotype;
-	ace->who = who;
-
-	acl->naces++;
-}
-
 static struct {
 	char *string;
 	int   stringlen;
@@ -851,6 +835,5 @@
 }
 
 EXPORT_SYMBOL(nfs4_acl_new);
-EXPORT_SYMBOL(nfs4_acl_add_ace);
 EXPORT_SYMBOL(nfs4_acl_get_whotype);
 EXPORT_SYMBOL(nfs4_acl_write_who);
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 678f3be..3cc8ce4 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1326,8 +1326,6 @@
 {
 	struct nfs4_delegation *dp = __dp;
 
-	daemonize("nfsv4-recall");
-
 	nfsd4_cb_recall(dp);
 	return 0;
 }
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 739dd3c..6ca2d24 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -323,7 +323,7 @@
 	 *
 	 */
 
-	u8 version = 1;
+	u8 version;
 	u8 fsid_type = 0;
 	struct inode * inode = dentry->d_inode;
 	struct dentry *parent = dentry->d_parent;
@@ -341,15 +341,59 @@
 	 * the reference filehandle (if it is in the same export)
 	 * or the export options.
 	 */
+ retry:
+	version = 1;
 	if (ref_fh && ref_fh->fh_export == exp) {
 		version = ref_fh->fh_handle.fh_version;
-		if (version == 0xca)
+		fsid_type = ref_fh->fh_handle.fh_fsid_type;
+
+		if (ref_fh == fhp)
+			fh_put(ref_fh);
+		ref_fh = NULL;
+
+		switch (version) {
+		case 0xca:
 			fsid_type = FSID_DEV;
-		else
-			fsid_type = ref_fh->fh_handle.fh_fsid_type;
-		/* We know this version/type works for this export
-		 * so there is no need for further checks.
+			break;
+		case 1:
+			break;
+		default:
+			goto retry;
+		}
+
+		/* Need to check that this type works for this
+		 * export point.  As the fsid -> filesystem mapping
+		 * was guided by user-space, there is no guarantee
+		 * that the filesystem actually supports that fsid
+		 * type. If it doesn't we loop around again without
+		 * ref_fh set.
 		 */
+		switch(fsid_type) {
+		case FSID_DEV:
+			if (!old_valid_dev(ex_dev))
+				goto retry;
+			/* FALL THROUGH */
+		case FSID_MAJOR_MINOR:
+		case FSID_ENCODE_DEV:
+			if (!(exp->ex_dentry->d_inode->i_sb->s_type->fs_flags
+			      & FS_REQUIRES_DEV))
+				goto retry;
+			break;
+		case FSID_NUM:
+			if (! (exp->ex_flags & NFSEXP_FSID))
+				goto retry;
+			break;
+		case FSID_UUID8:
+		case FSID_UUID16:
+			if (!root_export)
+				goto retry;
+			/* fall through */
+		case FSID_UUID4_INUM:
+		case FSID_UUID16_INUM:
+			if (exp->ex_uuid == NULL)
+				goto retry;
+			break;
+		}
 	} else if (exp->ex_uuid) {
 		if (fhp->fh_maxsize >= 64) {
 			if (root_export)
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index 5cc2eec..b2c7147 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -155,7 +155,7 @@
 				argp->count);
 		argp->count = NFSSVC_MAXBLKSIZE_V2;
 	}
-	svc_reserve(rqstp, (19<<2) + argp->count + 4);
+	svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
 
 	resp->count = argp->count;
 	nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c
index 0c24b9e..cb3e7fa 100644
--- a/fs/nfsd/nfsxdr.c
+++ b/fs/nfsd/nfsxdr.c
@@ -231,9 +231,10 @@
 nfssvc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
 					struct nfsd_sattrargs *args)
 {
-	if (!(p = decode_fh(p, &args->fh))
-	 || !(p = decode_sattr(p, &args->attrs)))
+	p = decode_fh(p, &args->fh);
+	if (!p)
 		return 0;
+	p = decode_sattr(p, &args->attrs);
 
 	return xdr_argsize_check(rqstp, p);
 }
@@ -284,8 +285,9 @@
 nfssvc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
 					struct nfsd_writeargs *args)
 {
-	unsigned int len;
+	unsigned int len, hdr, dlen;
 	int v;
+
 	if (!(p = decode_fh(p, &args->fh)))
 		return 0;
 
@@ -293,11 +295,30 @@
 	args->offset = ntohl(*p++);	/* offset */
 	p++;				/* totalcount */
 	len = args->len = ntohl(*p++);
-	rqstp->rq_vec[0].iov_base = (void*)p;
-	rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len -
-				(((void*)p) - rqstp->rq_arg.head[0].iov_base);
+	/*
+	 * The protocol specifies a maximum of 8192 bytes.
+	 */
 	if (len > NFSSVC_MAXBLKSIZE_V2)
-		len = NFSSVC_MAXBLKSIZE_V2;
+		return 0;
+
+	/*
+	 * Check to make sure that we got the right number of
+	 * bytes.
+	 */
+	hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
+	dlen = rqstp->rq_arg.head[0].iov_len + rqstp->rq_arg.page_len
+		- hdr;
+
+	/*
+	 * Round the length of the data which was specified up to
+	 * the next multiple of XDR units and then compare that
+	 * against the length which was actually received.
+	 */
+	if (dlen != XDR_QUADLEN(len)*4)
+		return 0;
+
+	rqstp->rq_vec[0].iov_base = (void*)p;
+	rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len - hdr;
 	v = 0;
 	while (len > rqstp->rq_vec[v].iov_len) {
 		len -= rqstp->rq_vec[v].iov_len;
@@ -306,18 +327,18 @@
 		rqstp->rq_vec[v].iov_len = PAGE_SIZE;
 	}
 	rqstp->rq_vec[v].iov_len = len;
-	args->vlen = v+1;
-	return rqstp->rq_vec[0].iov_len > 0;
+	args->vlen = v + 1;
+	return 1;
 }
 
 int
 nfssvc_decode_createargs(struct svc_rqst *rqstp, __be32 *p,
 					struct nfsd_createargs *args)
 {
-	if (!(p = decode_fh(p, &args->fh))
-	 || !(p = decode_filename(p, &args->name, &args->len))
-	 || !(p = decode_sattr(p, &args->attrs)))
+	if (   !(p = decode_fh(p, &args->fh))
+	    || !(p = decode_filename(p, &args->name, &args->len)))
 		return 0;
+	p = decode_sattr(p, &args->attrs);
 
 	return xdr_argsize_check(rqstp, p);
 }
@@ -361,11 +382,11 @@
 nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
 					struct nfsd_symlinkargs *args)
 {
-	if (!(p = decode_fh(p, &args->ffh))
-	 || !(p = decode_filename(p, &args->fname, &args->flen))
-	 || !(p = decode_pathname(p, &args->tname, &args->tlen))
-	 || !(p = decode_sattr(p, &args->attrs)))
+	if (   !(p = decode_fh(p, &args->ffh))
+	    || !(p = decode_filename(p, &args->fname, &args->flen))
+	    || !(p = decode_pathname(p, &args->tname, &args->tlen)))
 		return 0;
+	p = decode_sattr(p, &args->attrs);
 
 	return xdr_argsize_check(rqstp, p);
 }
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index ab45db5..9e451a6 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -1059,20 +1059,12 @@
 	   maping blocks, since there is none, so we just zero out remaining
 	   parts of first and last pages in write area (if needed) */
 	if ((pos & ~((loff_t) PAGE_CACHE_SIZE - 1)) > inode->i_size) {
-		if (from != 0) {	/* First page needs to be partially zeroed */
-			char *kaddr = kmap_atomic(prepared_pages[0], KM_USER0);
-			memset(kaddr, 0, from);
-			kunmap_atomic(kaddr, KM_USER0);
-			flush_dcache_page(prepared_pages[0]);
-		}
-		if (to != PAGE_CACHE_SIZE) {	/* Last page needs to be partially zeroed */
-			char *kaddr =
-			    kmap_atomic(prepared_pages[num_pages - 1],
-					KM_USER0);
-			memset(kaddr + to, 0, PAGE_CACHE_SIZE - to);
-			kunmap_atomic(kaddr, KM_USER0);
-			flush_dcache_page(prepared_pages[num_pages - 1]);
-		}
+		if (from != 0)		/* First page needs to be partially zeroed */
+			zero_user_page(prepared_pages[0], 0, from, KM_USER0);
+
+		if (to != PAGE_CACHE_SIZE)	/* Last page needs to be partially zeroed */
+			zero_user_page(prepared_pages[num_pages-1], to,
+					PAGE_CACHE_SIZE - to, KM_USER0);
 
 		/* Since all blocks are new - use already calculated value */
 		return blocks;
@@ -1199,13 +1191,9 @@
 					ll_rw_block(READ, 1, &bh);
 					*wait_bh++ = bh;
 				} else {	/* Not mapped, zero it */
-					char *kaddr =
-					    kmap_atomic(prepared_pages[0],
-							KM_USER0);
-					memset(kaddr + block_start, 0,
-					       from - block_start);
-					kunmap_atomic(kaddr, KM_USER0);
-					flush_dcache_page(prepared_pages[0]);
+					zero_user_page(prepared_pages[0],
+						       block_start,
+						       from - block_start, KM_USER0);
 					set_buffer_uptodate(bh);
 				}
 			}
@@ -1237,13 +1225,8 @@
 					ll_rw_block(READ, 1, &bh);
 					*wait_bh++ = bh;
 				} else {	/* Not mapped, zero it */
-					char *kaddr =
-					    kmap_atomic(prepared_pages
-							[num_pages - 1],
-							KM_USER0);
-					memset(kaddr + to, 0, block_end - to);
-					kunmap_atomic(kaddr, KM_USER0);
-					flush_dcache_page(prepared_pages[num_pages - 1]);
+					zero_user_page(prepared_pages[num_pages-1],
+							to, block_end - to, KM_USER0);
 					set_buffer_uptodate(bh);
 				}
 			}
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 9fcbfe3..1272d11 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -2148,13 +2148,8 @@
 		length = offset & (blocksize - 1);
 		/* if we are not on a block boundary */
 		if (length) {
-			char *kaddr;
-
 			length = blocksize - length;
-			kaddr = kmap_atomic(page, KM_USER0);
-			memset(kaddr + offset, 0, length);
-			flush_dcache_page(page);
-			kunmap_atomic(kaddr, KM_USER0);
+			zero_user_page(page, offset, length, KM_USER0);
 			if (buffer_mapped(bh) && bh->b_blocknr != 0) {
 				mark_buffer_dirty(bh);
 			}
@@ -2370,7 +2365,6 @@
 	 ** last byte in the file
 	 */
 	if (page->index >= end_index) {
-		char *kaddr;
 		unsigned last_offset;
 
 		last_offset = inode->i_size & (PAGE_CACHE_SIZE - 1);
@@ -2379,10 +2373,7 @@
 			unlock_page(page);
 			return 0;
 		}
-		kaddr = kmap_atomic(page, KM_USER0);
-		memset(kaddr + last_offset, 0, PAGE_CACHE_SIZE - last_offset);
-		flush_dcache_page(page);
-		kunmap_atomic(kaddr, KM_USER0);
+		zero_user_page(page, last_offset, PAGE_CACHE_SIZE - last_offset, KM_USER0);
 	}
 	bh = head;
 	block = page->index << (PAGE_CACHE_SHIFT - s->s_blocksize_bits);
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 0e637ad..b502c71 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -111,36 +111,6 @@
 	return ret;
 }
 
-
-/**
- *	flush_read_buffer - push buffer to userspace.
- *	@buffer:	data buffer for file.
- *	@buf:		user-passed buffer.
- *	@count:		number of bytes requested.
- *	@ppos:		file position.
- *
- *	Copy the buffer we filled in fill_read_buffer() to userspace.
- *	This is done at the reader's leisure, copying and advancing 
- *	the amount they specify each time.
- *	This may be called continuously until the buffer is empty.
- */
-static int flush_read_buffer(struct sysfs_buffer * buffer, char __user * buf,
-			     size_t count, loff_t * ppos)
-{
-	int error;
-
-	if (*ppos > buffer->count)
-		return 0;
-
-	if (count > (buffer->count - *ppos))
-		count = buffer->count - *ppos;
-
-	error = copy_to_user(buf,buffer->page + *ppos,count);
-	if (!error)
-		*ppos += count;
-	return error ? -EFAULT : count;
-}
-
 /**
  *	sysfs_read_file - read an attribute. 
  *	@file:	file pointer.
@@ -177,7 +147,8 @@
 	}
 	pr_debug("%s: count = %zd, ppos = %lld, buf = %s\n",
 		 __FUNCTION__, count, *ppos, buffer->page);
-	retval = flush_read_buffer(buffer,buf,count,ppos);
+	retval = simple_read_from_buffer(buf, count, ppos, buffer->page,
+					 buffer->count);
 out:
 	up(&buffer->sem);
 	return retval;
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index f5aa3ef..a96bde6 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -1734,11 +1734,13 @@
 			per_cpu_ptr(mp->m_sb_cnts, (unsigned long)hcpu);
 	switch (action) {
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		/* Easy Case - initialize the area and locks, and
 		 * then rebalance when online does everything else for us. */
 		memset(cntp, 0, sizeof(xfs_icsb_cnts_t));
 		break;
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		xfs_icsb_lock(mp);
 		xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0, 0);
 		xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0, 0);
@@ -1746,6 +1748,7 @@
 		xfs_icsb_unlock(mp);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		/* Disable all the counters, then fold the dead cpu's
 		 * count into the total on the global superblock and
 		 * re-enable the counters. */
diff --git a/include/asm-alpha/smp.h b/include/asm-alpha/smp.h
index a1a1eca..286e1d84 100644
--- a/include/asm-alpha/smp.h
+++ b/include/asm-alpha/smp.h
@@ -51,6 +51,7 @@
 
 #else /* CONFIG_SMP */
 
+#define hard_smp_processor_id()		0
 #define smp_call_function_on_cpu(func,info,retry,wait,cpu)    ({ 0; })
 
 #endif /* CONFIG_SMP */
diff --git a/include/asm-alpha/thread_info.h b/include/asm-alpha/thread_info.h
index eeb3bef..f4defc2 100644
--- a/include/asm-alpha/thread_info.h
+++ b/include/asm-alpha/thread_info.h
@@ -97,7 +97,7 @@
 				 1 << TIF_UAC_SIGBUS)
 
 #define SET_UNALIGN_CTL(task,value)	({				     \
-	(task)->thread_info->flags = (((task)->thread_info->flags &	     \
+	task_thread_info(task)->flags = ((task_thread_info(task)->flags &    \
 		~ALPHA_UAC_MASK)					     \
 		| (((value) << ALPHA_UAC_SHIFT)       & (1<<TIF_UAC_NOPRINT))\
 		| (((value) << (ALPHA_UAC_SHIFT + 1)) & (1<<TIF_UAC_SIGBUS)) \
@@ -105,11 +105,11 @@
 	0; })
 
 #define GET_UNALIGN_CTL(task,value)	({				\
-	put_user(((task)->thread_info->flags & (1 << TIF_UAC_NOPRINT))	\
+	put_user((task_thread_info(task)->flags & (1 << TIF_UAC_NOPRINT))\
 		  >> ALPHA_UAC_SHIFT					\
-		 | ((task)->thread_info->flags & (1 << TIF_UAC_SIGBUS))	\
+		 | (task_thread_info(task)->flags & (1 << TIF_UAC_SIGBUS))\
 		 >> (ALPHA_UAC_SHIFT + 1)				\
-		 | ((task)->thread_info->flags & (1 << TIF_UAC_NOFIX))	\
+		 | (task_thread_info(task)->flags & (1 << TIF_UAC_NOFIX))\
 		 >> (ALPHA_UAC_SHIFT - 1),				\
 		 (int __user *)(value));				\
 	})
diff --git a/include/asm-arm/arch-at91/cpu.h b/include/asm-arm/arch-at91/cpu.h
index d464ca5..7ef4eeb 100644
--- a/include/asm-arm/arch-at91/cpu.h
+++ b/include/asm-arm/arch-at91/cpu.h
@@ -68,4 +68,10 @@
 #define cpu_is_at91sam9263()	(0)
 #endif
 
+/*
+ * Since this is ARM, we will never run on any AVR32 CPU. But these
+ * definitions may reduce clutter in common drivers.
+ */
+#define cpu_is_at32ap7000()	(0)
+
 #endif
diff --git a/include/asm-avr32/arch-at32ap/cpu.h b/include/asm-avr32/arch-at32ap/cpu.h
new file mode 100644
index 0000000..2bdc5bd
--- /dev/null
+++ b/include/asm-avr32/arch-at32ap/cpu.h
@@ -0,0 +1,33 @@
+/*
+ * AVR32 and (fake) AT91 CPU identification
+ *
+ * Copyright (C) 2007 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __ASM_ARCH_CPU_H
+#define __ASM_ARCH_CPU_H
+
+/*
+ * Only AT32AP7000 is defined for now. We can identify the specific
+ * chip at runtime, but I'm not sure if it's really worth it.
+ */
+#ifdef CONFIG_CPU_AT32AP7000
+# define cpu_is_at32ap7000()	(1)
+#else
+# define cpu_is_at32ap7000()	(0)
+#endif
+
+/*
+ * Since this is AVR32, we will never run on any AT91 CPU. But these
+ * definitions may reduce clutter in common drivers.
+ */
+#define cpu_is_at91rm9200()	(0)
+#define cpu_is_at91sam9xe()	(0)
+#define cpu_is_at91sam9260()	(0)
+#define cpu_is_at91sam9261()	(0)
+#define cpu_is_at91sam9263()	(0)
+
+#endif /* __ASM_ARCH_CPU_H */
diff --git a/include/asm-blackfin/processor.h b/include/asm-blackfin/processor.h
index 997465c..0336ff1 100644
--- a/include/asm-blackfin/processor.h
+++ b/include/asm-blackfin/processor.h
@@ -58,10 +58,10 @@
 	(_regs)->pc = (_pc);						\
 	if (current->mm)						\
 		(_regs)->p5 = current->mm->start_data;			\
-	current->thread_info->l1_task_info.stack_start			\
+	task_thread_info(current)->l1_task_info.stack_start		\
 		= (void *)current->mm->context.stack_start;		\
-	current->thread_info->l1_task_info.lowest_sp = (void *)(_usp);	       	\
-	memcpy(L1_SCRATCH_TASK_INFO, &current->thread_info->l1_task_info,	\
+	task_thread_info(current)->l1_task_info.lowest_sp = (void *)(_usp); \
+	memcpy(L1_SCRATCH_TASK_INFO, &task_thread_info(current)->l1_task_info, \
 		sizeof(*L1_SCRATCH_TASK_INFO));				\
 	wrusp(_usp);							\
 } while(0)
diff --git a/include/asm-blackfin/system.h b/include/asm-blackfin/system.h
index b5bf6e7..5e5f1a0 100644
--- a/include/asm-blackfin/system.h
+++ b/include/asm-blackfin/system.h
@@ -239,9 +239,9 @@
 
 #define switch_to(prev,next,last) \
 do {    \
-	memcpy (&prev->thread_info->l1_task_info, L1_SCRATCH_TASK_INFO, \
+	memcpy (&task_thread_info(prev)->l1_task_info, L1_SCRATCH_TASK_INFO, \
 		sizeof *L1_SCRATCH_TASK_INFO); \
-	memcpy (L1_SCRATCH_TASK_INFO, &next->thread_info->l1_task_info, \
+	memcpy (L1_SCRATCH_TASK_INFO, &task_thread_info(next)->l1_task_info, \
 		sizeof *L1_SCRATCH_TASK_INFO); \
 	(last) = resume (prev, next);   \
 } while (0)
diff --git a/include/asm-frv/tlb.h b/include/asm-frv/tlb.h
index f94fe5c..cd458eb 100644
--- a/include/asm-frv/tlb.h
+++ b/include/asm-frv/tlb.h
@@ -3,7 +3,11 @@
 
 #include <asm/tlbflush.h>
 
+#ifdef CONFIG_MMU
+extern void check_pgt_cache(void);
+#else
 #define check_pgt_cache() do {} while(0)
+#endif
 
 /*
  * we don't need any special per-pte or per-vma handling...
diff --git a/include/asm-i386/mmzone.h b/include/asm-i386/mmzone.h
index 3503ad6..118e981 100644
--- a/include/asm-i386/mmzone.h
+++ b/include/asm-i386/mmzone.h
@@ -122,21 +122,21 @@
 	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
 #define alloc_bootmem_node(pgdat, x)					\
 ({									\
-	struct pglist_data  __attribute__ ((unused))			\
+	struct pglist_data  __maybe_unused			\
 				*__alloc_bootmem_node__pgdat = (pgdat);	\
 	__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES,	\
 						__pa(MAX_DMA_ADDRESS));	\
 })
 #define alloc_bootmem_pages_node(pgdat, x)				\
 ({									\
-	struct pglist_data  __attribute__ ((unused))			\
+	struct pglist_data  __maybe_unused			\
 				*__alloc_bootmem_node__pgdat = (pgdat);	\
 	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE,		\
 						__pa(MAX_DMA_ADDRESS))	\
 })
 #define alloc_bootmem_low_pages_node(pgdat, x)				\
 ({									\
-	struct pglist_data  __attribute__ ((unused))			\
+	struct pglist_data  __maybe_unused			\
 				*__alloc_bootmem_node__pgdat = (pgdat);	\
 	__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0);		\
 })
diff --git a/include/asm-i386/msr.h b/include/asm-i386/msr.h
index 26861df..df21ea0 100644
--- a/include/asm-i386/msr.h
+++ b/include/asm-i386/msr.h
@@ -86,62 +86,50 @@
 
 #define rdmsr(msr,val1,val2)						\
 	do {								\
-		unsigned long long __val = native_read_msr(msr);	\
-		val1 = __val;						\
-		val2 = __val >> 32;					\
+		u64 __val = native_read_msr(msr);			\
+		(val1) = (u32)__val;					\
+		(val2) = (u32)(__val >> 32);				\
 	} while(0)
 
-#define wrmsr(msr,val1,val2)						\
-	native_write_msr(msr, ((unsigned long long)val2 << 32) | val1)
-
-#define rdmsrl(msr,val)					\
-	do {						\
-		(val) = native_read_msr(msr);		\
-	} while(0)
-
-static inline void wrmsrl (unsigned long msr, unsigned long long val)
+static inline void wrmsr(u32 __msr, u32 __low, u32 __high)
 {
-	unsigned long lo, hi;
-	lo = (unsigned long) val;
-	hi = val >> 32;
-	wrmsr (msr, lo, hi);
+	native_write_msr(__msr, ((u64)__high << 32) | __low);
 }
 
+#define rdmsrl(msr,val)							\
+	((val) = native_read_msr(msr))
+
+#define wrmsrl(msr,val)	native_write_msr(msr, val)
+
 /* wrmsr with exception handling */
-#define wrmsr_safe(msr,val1,val2)						\
-	(native_write_msr_safe(msr, ((unsigned long long)val2 << 32) | val1))
+static inline int wrmsr_safe(u32 __msr, u32 __low, u32 __high)
+{
+	return native_write_msr_safe(__msr, ((u64)__high << 32) | __low);
+}
 
 /* rdmsr with exception handling */
 #define rdmsr_safe(msr,p1,p2)						\
 	({								\
 		int __err;						\
-		unsigned long long __val = native_read_msr_safe(msr, &__err);\
-		(*p1) = __val;						\
-		(*p2) = __val >> 32;					\
+		u64 __val = native_read_msr_safe(msr, &__err);		\
+		(*p1) = (u32)__val;					\
+		(*p2) = (u32)(__val >> 32);				\
 		__err;							\
 	})
 
-#define rdtsc(low,high)						\
-	do {							\
-		u64 _l = native_read_tsc();			\
-		(low) = (u32)_l;				\
-		(high) = _l >> 32;				\
-	} while(0)
-
 #define rdtscl(low)						\
-	do {							\
-		(low) = native_read_tsc();			\
-	} while(0)
+	((low) = (u32)native_read_tsc())
 
-#define rdtscll(val) ((val) = native_read_tsc())
+#define rdtscll(val)						\
+	((val) = native_read_tsc())
 
 #define write_tsc(val1,val2) wrmsr(0x10, val1, val2)
 
 #define rdpmc(counter,low,high)					\
 	do {							\
 		u64 _l = native_read_pmc();			\
-		low = (u32)_l;					\
-		high = _l >> 32;				\
+		(low)  = (u32)_l;				\
+		(high) = (u32)(_l >> 32);			\
 	} while(0)
 #endif	/* !CONFIG_PARAVIRT */
 
diff --git a/include/asm-i386/paravirt.h b/include/asm-i386/paravirt.h
index e2e7f98..bc5c12c 100644
--- a/include/asm-i386/paravirt.h
+++ b/include/asm-i386/paravirt.h
@@ -560,11 +560,6 @@
 {
 	return PVOP_CALL0(u64, read_tsc);
 }
-#define rdtsc(low,high) do {			\
-	u64 _l = paravirt_read_tsc();		\
-	low = (u32)_l;				\
-	high = _l >> 32;			\
-} while(0)
 
 #define rdtscl(low) do {			\
 	u64 _l = paravirt_read_tsc();		\
diff --git a/include/asm-i386/smp.h b/include/asm-i386/smp.h
index 090abc1..0c71327 100644
--- a/include/asm-i386/smp.h
+++ b/include/asm-i386/smp.h
@@ -124,20 +124,6 @@
 	return cpus_weight(cpu_callout_map);
 }
 
-#ifdef CONFIG_X86_LOCAL_APIC
-
-#ifdef APIC_DEFINITION
-extern int hard_smp_processor_id(void);
-#else
-#include <mach_apicdef.h>
-static inline int hard_smp_processor_id(void)
-{
-	/* we don't want to mark this access volatile - bad code generation */
-	return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
-}
-#endif
-#endif
-
 extern int safe_smp_processor_id(void);
 extern int __cpu_disable(void);
 extern void __cpu_die(unsigned int cpu);
@@ -152,10 +138,31 @@
 
 #define NO_PROC_ID		0xFF		/* No processor magic marker */
 
-#endif
+#endif /* CONFIG_SMP */
 
 #ifndef __ASSEMBLY__
 
+#ifdef CONFIG_X86_LOCAL_APIC
+
+#ifdef APIC_DEFINITION
+extern int hard_smp_processor_id(void);
+#else
+#include <mach_apicdef.h>
+static inline int hard_smp_processor_id(void)
+{
+	/* we don't want to mark this access volatile - bad code generation */
+	return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
+}
+#endif /* APIC_DEFINITION */
+
+#else /* CONFIG_X86_LOCAL_APIC */
+
+#ifndef CONFIG_SMP
+#define hard_smp_processor_id()		0
+#endif
+
+#endif /* CONFIG_X86_LOCAL_APIC */
+
 extern u8 apicid_2_node[];
 
 #ifdef CONFIG_X86_LOCAL_APIC
diff --git a/include/asm-i386/thread_info.h b/include/asm-i386/thread_info.h
index bf01d4b..4cb0f91 100644
--- a/include/asm-i386/thread_info.h
+++ b/include/asm-i386/thread_info.h
@@ -172,7 +172,7 @@
 #define TS_USEDFPU		0x0001	/* FPU was used by this task this quantum (SMP) */
 #define TS_POLLING		0x0002	/* True if in idle loop and not sleeping */
 
-#define tsk_is_polling(t) ((t)->thread_info->status & TS_POLLING)
+#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
 
 #endif /* __KERNEL__ */
 
diff --git a/include/asm-ia64/smp.h b/include/asm-ia64/smp.h
index 60fd4ae..c600249 100644
--- a/include/asm-ia64/smp.h
+++ b/include/asm-ia64/smp.h
@@ -38,6 +38,8 @@
 	return lid.f.id << 8 | lid.f.eid;
 }
 
+#define hard_smp_processor_id()		ia64_get_lid()
+
 #ifdef CONFIG_SMP
 
 #define XTP_OFFSET		0x1e0008
@@ -110,8 +112,6 @@
 		writeb(0x0f, ipi_base_addr + XTP_OFFSET); /* Set XTP to max */
 }
 
-#define hard_smp_processor_id()		ia64_get_lid()
-
 /* Upping and downing of CPUs */
 extern int __cpu_disable (void);
 extern void __cpu_die (unsigned int cpu);
@@ -128,7 +128,7 @@
 extern void identify_siblings (struct cpuinfo_ia64 *);
 extern int is_multithreading_enabled(void);
 
-#else
+#else /* CONFIG_SMP */
 
 #define cpu_logical_id(i)		0
 #define cpu_physical_id(i)		ia64_get_lid()
diff --git a/include/asm-ia64/thread_info.h b/include/asm-ia64/thread_info.h
index 9169859..d281475 100644
--- a/include/asm-ia64/thread_info.h
+++ b/include/asm-ia64/thread_info.h
@@ -110,6 +110,6 @@
 
 #define TS_POLLING		1 	/* true if in idle loop and not sleeping */
 
-#define tsk_is_polling(t) ((t)->thread_info->status & TS_POLLING)
+#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
 
 #endif /* _ASM_IA64_THREAD_INFO_H */
diff --git a/include/asm-m32r/smp.h b/include/asm-m32r/smp.h
index abd937a..078e1a5 100644
--- a/include/asm-m32r/smp.h
+++ b/include/asm-m32r/smp.h
@@ -108,6 +108,10 @@
 #define IPI_SHIFT	(0)
 #define NR_IPIS		(8)
 
-#endif	/* CONFIG_SMP */
+#else	/* CONFIG_SMP */
+
+#define hard_smp_processor_id()		0
+
+#endif /* CONFIG_SMP */
 
 #endif	/* _ASM_M32R_SMP_H */
diff --git a/include/asm-m68k/thread_info.h b/include/asm-m68k/thread_info.h
index c4d622a..d635a37 100644
--- a/include/asm-m68k/thread_info.h
+++ b/include/asm-m68k/thread_info.h
@@ -37,17 +37,17 @@
 #define init_stack		(init_thread_union.stack)
 
 #define task_thread_info(tsk)	(&(tsk)->thread.info)
-#define task_stack_page(tsk)	((void *)(tsk)->thread_info)
+#define task_stack_page(tsk)	((tsk)->stack)
 #define current_thread_info()	task_thread_info(current)
 
 #define __HAVE_THREAD_FUNCTIONS
 
 #define setup_thread_stack(p, org) ({			\
-	*(struct task_struct **)(p)->thread_info = (p);	\
+	*(struct task_struct **)(p)->stack = (p);	\
 	task_thread_info(p)->task = (p);		\
 })
 
-#define end_of_stack(p) ((unsigned long *)(p)->thread_info + 1)
+#define end_of_stack(p) ((unsigned long *)(p)->stack + 1)
 
 /* entry.S relies on these definitions!
  * bits 0-7 are tested at every exception exit
diff --git a/include/asm-mips/system.h b/include/asm-mips/system.h
index 30f23a2..3713d25 100644
--- a/include/asm-mips/system.h
+++ b/include/asm-mips/system.h
@@ -55,7 +55,7 @@
 	if (cpu_has_dsp)						\
 		__save_dsp(prev);					\
 	next->thread.emulated_fp = 0;					\
-	(last) = resume(prev, next, next->thread_info);			\
+	(last) = resume(prev, next, task_thread_info(next));		\
 	if (cpu_has_dsp)						\
 		__restore_dsp(current);					\
 } while(0)
diff --git a/include/asm-parisc/compat.h b/include/asm-parisc/compat.h
index fe85790..11f4222 100644
--- a/include/asm-parisc/compat.h
+++ b/include/asm-parisc/compat.h
@@ -152,7 +152,7 @@
 
 static inline int __is_compat_task(struct task_struct *t)
 {
-	return test_ti_thread_flag(t->thread_info, TIF_32BIT);
+	return test_ti_thread_flag(task_thread_info(t), TIF_32BIT);
 }
 
 static inline int is_compat_task(void)
diff --git a/include/asm-powerpc/smp.h b/include/asm-powerpc/smp.h
index 01717f2..d037f50 100644
--- a/include/asm-powerpc/smp.h
+++ b/include/asm-powerpc/smp.h
@@ -83,6 +83,7 @@
 
 #else
 /* for UP */
+#define hard_smp_processor_id()		0
 #define smp_setup_cpu_maps()
 
 #endif /* CONFIG_SMP */
diff --git a/include/asm-s390/smp.h b/include/asm-s390/smp.h
index 0a28e6d..76e424f 100644
--- a/include/asm-s390/smp.h
+++ b/include/asm-s390/smp.h
@@ -110,6 +110,7 @@
 	__load_psw_mask(psw_kernel_bits & ~PSW_MASK_MCHECK);
 }
 
+#define hard_smp_processor_id()		0
 #define smp_cpu_not_running(cpu)	1
 #define smp_setup_cpu_possible_map()	do { } while (0)
 #endif
diff --git a/include/asm-sh/cpu-sh3/dma.h b/include/asm-sh/cpu-sh3/dma.h
index 954801b..3a66dc4 100644
--- a/include/asm-sh/cpu-sh3/dma.h
+++ b/include/asm-sh/cpu-sh3/dma.h
@@ -26,7 +26,7 @@
 	XMIT_SZ_128BIT,
 };
 
-static unsigned int ts_shift[] __attribute__ ((used)) = {
+static unsigned int ts_shift[] __maybe_unused = {
 	[XMIT_SZ_8BIT]		= 0,
 	[XMIT_SZ_16BIT]		= 1,
 	[XMIT_SZ_32BIT]		= 2,
diff --git a/include/asm-sh/cpu-sh4/dma-sh7780.h b/include/asm-sh/cpu-sh4/dma-sh7780.h
index 6c90d28..71b426a 100644
--- a/include/asm-sh/cpu-sh4/dma-sh7780.h
+++ b/include/asm-sh/cpu-sh4/dma-sh7780.h
@@ -28,7 +28,7 @@
 /*
  * The DMA count is defined as the number of bytes to transfer.
  */
-static unsigned int __attribute__ ((used)) ts_shift[] = {
+static unsigned int ts_shift[] __maybe_unused = {
 	[XMIT_SZ_8BIT]		= 0,
 	[XMIT_SZ_16BIT]		= 1,
 	[XMIT_SZ_32BIT]		= 2,
diff --git a/include/asm-sh/cpu-sh4/dma.h b/include/asm-sh/cpu-sh4/dma.h
index c135e9c..36e26a9 100644
--- a/include/asm-sh/cpu-sh4/dma.h
+++ b/include/asm-sh/cpu-sh4/dma.h
@@ -53,7 +53,7 @@
 /*
  * The DMA count is defined as the number of bytes to transfer.
  */
-static unsigned int ts_shift[] __attribute__ ((used)) = {
+static unsigned int ts_shift[] __maybe_unused = {
 	[XMIT_SZ_64BIT]		= 3,
 	[XMIT_SZ_8BIT]		= 0,
 	[XMIT_SZ_16BIT]		= 1,
diff --git a/include/asm-sparc/smp.h b/include/asm-sparc/smp.h
index b9da9a6..b3f4922 100644
--- a/include/asm-sparc/smp.h
+++ b/include/asm-sparc/smp.h
@@ -165,6 +165,7 @@
 
 #else /* SMP */
 
+#define hard_smp_processor_id()		0
 #define smp_setup_cpu_possible_map() do { } while (0)
 
 #endif /* !(SMP) */
diff --git a/include/asm-sparc64/smp.h b/include/asm-sparc64/smp.h
index cca5480..869d16f 100644
--- a/include/asm-sparc64/smp.h
+++ b/include/asm-sparc64/smp.h
@@ -48,6 +48,7 @@
 
 #else
 
+#define hard_smp_processor_id()		0
 #define smp_setup_cpu_possible_map() do { } while (0)
 #define boot_cpu_id	(0)
 
diff --git a/include/asm-um/required-features.h b/include/asm-um/required-features.h
new file mode 100644
index 0000000..dfb967b
--- /dev/null
+++ b/include/asm-um/required-features.h
@@ -0,0 +1,9 @@
+#ifndef __UM_REQUIRED_FEATURES_H
+#define __UM_REQUIRED_FEATURES_H
+
+/*
+ * Nothing to see, just need something for the i386 and x86_64 asm
+ * headers to include.
+ */
+
+#endif
diff --git a/include/asm-um/smp.h b/include/asm-um/smp.h
index ca55226..84f8cf2 100644
--- a/include/asm-um/smp.h
+++ b/include/asm-um/smp.h
@@ -24,6 +24,10 @@
 
 extern struct task_struct *idle_threads[NR_CPUS];
 
+#else
+
+#define hard_smp_processor_id()		0
+
 #endif
 
 #endif
diff --git a/include/asm-x86_64/smp.h b/include/asm-x86_64/smp.h
index d570442..3f303d2 100644
--- a/include/asm-x86_64/smp.h
+++ b/include/asm-x86_64/smp.h
@@ -57,12 +57,6 @@
 
 #define raw_smp_processor_id() read_pda(cpunumber)
 
-static inline int hard_smp_processor_id(void)
-{
-	/* we don't want to mark this access volatile - bad code generation */
-	return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
-}
-
 extern int __cpu_disable(void);
 extern void __cpu_die(unsigned int cpu);
 extern void prefill_possible_map(void);
@@ -71,7 +65,13 @@
 
 #define NO_PROC_ID		0xFF		/* No processor magic marker */
 
-#endif
+#endif /* CONFIG_SMP */
+
+static inline int hard_smp_processor_id(void)
+{
+	/* we don't want to mark this access volatile - bad code generation */
+	return GET_APIC_ID(*(unsigned int *)(APIC_BASE+APIC_ID));
+}
 
 /*
  * Some lowlevel functions might want to know about
diff --git a/include/asm-x86_64/system.h b/include/asm-x86_64/system.h
index b7b8021..ead9f9a 100644
--- a/include/asm-x86_64/system.h
+++ b/include/asm-x86_64/system.h
@@ -39,7 +39,7 @@
 		       [threadrsp] "i" (offsetof(struct task_struct, thread.rsp)), \
 		       [ti_flags] "i" (offsetof(struct thread_info, flags)),\
 		       [tif_fork] "i" (TIF_FORK),			  \
-		       [thread_info] "i" (offsetof(struct task_struct, thread_info)), \
+		       [thread_info] "i" (offsetof(struct task_struct, stack)), \
 		       [pda_pcurrent] "i" (offsetof(struct x8664_pda, pcurrent))   \
 		     : "memory", "cc" __EXTRA_CLOBBER)
     
diff --git a/include/asm-x86_64/thread_info.h b/include/asm-x86_64/thread_info.h
index 74a6c74..10bb5a8 100644
--- a/include/asm-x86_64/thread_info.h
+++ b/include/asm-x86_64/thread_info.h
@@ -162,7 +162,7 @@
 #define TS_COMPAT		0x0002	/* 32bit syscall active */
 #define TS_POLLING		0x0004	/* true if in idle loop and not sleeping */
 
-#define tsk_is_polling(t) ((t)->thread_info->status & TS_POLLING)
+#define tsk_is_polling(t) (task_thread_info(t)->status & TS_POLLING)
 
 #endif /* __KERNEL__ */
 
diff --git a/include/linux/aio.h b/include/linux/aio.h
index a30ef13..43dc2eb 100644
--- a/include/linux/aio.h
+++ b/include/linux/aio.h
@@ -226,7 +226,8 @@
 		__put_ioctx(kioctx);					\
 } while (0)
 
-#define in_aio() !is_sync_wait(current->io_wait)
+#define in_aio() (unlikely(!is_sync_wait(current->io_wait)))
+
 /* may be used for debugging */
 #define warn_if_async()							\
 do {									\
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index a686eab..db5b00a 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -854,7 +854,7 @@
 
 struct work_struct;
 int kblockd_schedule_work(struct work_struct *work);
-void kblockd_flush(void);
+void kblockd_flush_work(struct work_struct *work);
 
 #define MODULE_ALIAS_BLOCKDEV(major,minor) \
 	MODULE_ALIAS("block-major-" __stringify(major) "-" __stringify(minor))
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index 2665ca0..bf297b0 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -49,6 +49,7 @@
  * @shift:		cycle to nanosecond divisor (power of two)
  * @flags:		flags describing special properties
  * @vread:		vsyscall based read
+ * @resume:		resume function for the clocksource, if necessary
  * @cycle_interval:	Used internally by timekeeping core, please ignore.
  * @xtime_interval:	Used internally by timekeeping core, please ignore.
  */
@@ -65,6 +66,7 @@
 	u32 shift;
 	unsigned long flags;
 	cycle_t (*vread)(void);
+	void (*resume)(void);
 
 	/* timekeeping specific data, ignore */
 	cycle_t cycle_interval;
@@ -209,6 +211,7 @@
 extern int clocksource_register(struct clocksource*);
 extern struct clocksource* clocksource_get_next(void);
 extern void clocksource_change_rating(struct clocksource *cs, int rating);
+extern void clocksource_resume(void);
 
 #ifdef CONFIG_GENERIC_TIME_VSYSCALL
 extern void update_vsyscall(struct timespec *ts, struct clocksource *c);
diff --git a/include/linux/compat.h b/include/linux/compat.h
index ccd863d..70a157a 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -253,5 +253,8 @@
 			const compat_sigset_t __user *sigmask,
 			compat_size_t sigsetsize);
 
+asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename,
+				struct compat_timespec __user *t, int flags);
+
 #endif /* CONFIG_COMPAT */
 #endif /* _LINUX_COMPAT_H */
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index a9f7947..03ec231 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -40,3 +40,4 @@
 #define  noinline			__attribute__((noinline))
 #define __attribute_pure__		__attribute__((pure))
 #define __attribute_const__		__attribute__((__const__))
+#define __maybe_unused			__attribute__((unused))
diff --git a/include/linux/compiler-gcc3.h b/include/linux/compiler-gcc3.h
index ecd621f..a9e2863 100644
--- a/include/linux/compiler-gcc3.h
+++ b/include/linux/compiler-gcc3.h
@@ -4,9 +4,11 @@
 #include <linux/compiler-gcc.h>
 
 #if __GNUC_MINOR__ >= 3
-# define __attribute_used__	__attribute__((__used__))
+# define __used			__attribute__((__used__))
+# define __attribute_used__	__used				/* deprecated */
 #else
-# define __attribute_used__	__attribute__((__unused__))
+# define __used			__attribute__((__unused__))
+# define __attribute_used__	__used				/* deprecated */
 #endif
 
 #if __GNUC_MINOR__ >= 4
diff --git a/include/linux/compiler-gcc4.h b/include/linux/compiler-gcc4.h
index fd0cc7c..a03e9398 100644
--- a/include/linux/compiler-gcc4.h
+++ b/include/linux/compiler-gcc4.h
@@ -12,7 +12,8 @@
 # define __inline		__inline	__attribute__((always_inline))
 #endif
 
-#define __attribute_used__	__attribute__((__used__))
+#define __used			__attribute__((__used__))
+#define __attribute_used__	__used			/* deprecated */
 #define __must_check 		__attribute__((warn_unused_result))
 #define __compiler_offsetof(a,b) __builtin_offsetof(a,b)
 #define __always_inline		inline __attribute__((always_inline))
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 3b6949b..498c3592 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -108,15 +108,30 @@
  * Allow us to avoid 'defined but not used' warnings on functions and data,
  * as well as force them to be emitted to the assembly file.
  *
- * As of gcc 3.3, static functions that are not marked with attribute((used))
- * may be elided from the assembly file.  As of gcc 3.3, static data not so
+ * As of gcc 3.4, static functions that are not marked with attribute((used))
+ * may be elided from the assembly file.  As of gcc 3.4, static data not so
  * marked will not be elided, but this may change in a future gcc version.
  *
+ * NOTE: Because distributions shipped with a backported unit-at-a-time
+ * compiler in gcc 3.3, we must define __used to be __attribute__((used))
+ * for gcc >=3.3 instead of 3.4.
+ *
  * In prior versions of gcc, such functions and data would be emitted, but
  * would be warned about except with attribute((unused)).
+ *
+ * Mark functions that are referenced only in inline assembly as __used so
+ * the code is emitted even though it appears to be unreferenced.
  */
 #ifndef __attribute_used__
-# define __attribute_used__	/* unimplemented */
+# define __attribute_used__	/* deprecated */
+#endif
+
+#ifndef __used
+# define __used			/* unimplemented */
+#endif
+
+#ifndef __maybe_unused
+# define __maybe_unused		/* unimplemented */
 #endif
 
 /*
diff --git a/include/linux/fb.h b/include/linux/fb.h
index dff7a728..c654d0e 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -868,7 +868,7 @@
 #define fb_writeq sbus_writeq
 #define fb_memset sbus_memset_io
 
-#elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || defined(__hppa__) || (defined(__sh__) && !defined(__SH5__)) || defined(__powerpc__)
+#elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || defined(__hppa__) || (defined(__sh__) && !defined(__SH5__)) || defined(__powerpc__) || defined(__avr32__)
 
 #define fb_readb __raw_readb
 #define fb_readw __raw_readw
diff --git a/include/linux/futex.h b/include/linux/futex.h
index 820125c..899fc7f 100644
--- a/include/linux/futex.h
+++ b/include/linux/futex.h
@@ -3,6 +3,8 @@
 
 #include <linux/sched.h>
 
+union ktime;
+
 /* Second argument to futex syscall */
 
 
@@ -15,6 +17,19 @@
 #define FUTEX_LOCK_PI		6
 #define FUTEX_UNLOCK_PI		7
 #define FUTEX_TRYLOCK_PI	8
+#define FUTEX_CMP_REQUEUE_PI	9
+
+#define FUTEX_PRIVATE_FLAG	128
+#define FUTEX_CMD_MASK		~FUTEX_PRIVATE_FLAG
+
+#define FUTEX_WAIT_PRIVATE	(FUTEX_WAIT | FUTEX_PRIVATE_FLAG)
+#define FUTEX_WAKE_PRIVATE	(FUTEX_WAKE | FUTEX_PRIVATE_FLAG)
+#define FUTEX_REQUEUE_PRIVATE	(FUTEX_REQUEUE | FUTEX_PRIVATE_FLAG)
+#define FUTEX_CMP_REQUEUE_PRIVATE (FUTEX_CMP_REQUEUE | FUTEX_PRIVATE_FLAG)
+#define FUTEX_WAKE_OP_PRIVATE	(FUTEX_WAKE_OP | FUTEX_PRIVATE_FLAG)
+#define FUTEX_LOCK_PI_PRIVATE	(FUTEX_LOCK_PI | FUTEX_PRIVATE_FLAG)
+#define FUTEX_UNLOCK_PI_PRIVATE	(FUTEX_UNLOCK_PI | FUTEX_PRIVATE_FLAG)
+#define FUTEX_TRYLOCK_PI_PRIVATE (FUTEX_TRYLOCK_PI | FUTEX_PRIVATE_FLAG)
 
 /*
  * Support for robust futexes: the kernel cleans up held futexes at
@@ -83,9 +98,14 @@
 #define FUTEX_OWNER_DIED	0x40000000
 
 /*
+ * Some processes have been requeued on this PI-futex
+ */
+#define FUTEX_WAITER_REQUEUED	0x20000000
+
+/*
  * The rest of the robust-futex field is for the TID:
  */
-#define FUTEX_TID_MASK		0x3fffffff
+#define FUTEX_TID_MASK		0x0fffffff
 
 /*
  * This limit protects against a deliberately circular list.
@@ -94,7 +114,7 @@
 #define ROBUST_LIST_LIMIT	2048
 
 #ifdef __KERNEL__
-long do_futex(u32 __user *uaddr, int op, u32 val, unsigned long timeout,
+long do_futex(u32 __user *uaddr, int op, u32 val, union ktime *timeout,
 	      u32 __user *uaddr2, u32 val2, u32 val3);
 
 extern int
@@ -106,9 +126,20 @@
  * Don't rearrange members without looking at hash_futex().
  *
  * offset is aligned to a multiple of sizeof(u32) (== 4) by definition.
- * We set bit 0 to indicate if it's an inode-based key.
- */
+ * We use the two low order bits of offset to tell what is the kind of key :
+ *  00 : Private process futex (PTHREAD_PROCESS_PRIVATE)
+ *       (no reference on an inode or mm)
+ *  01 : Shared futex (PTHREAD_PROCESS_SHARED)
+ *	mapped on a file (reference on the underlying inode)
+ *  10 : Shared futex (PTHREAD_PROCESS_SHARED)
+ *       (but private mapping on an mm, and reference taken on it)
+*/
+
+#define FUT_OFF_INODE    1 /* We set bit 0 if key has a reference on inode */
+#define FUT_OFF_MMSHARED 2 /* We set bit 1 if key has a reference on mm */
+
 union futex_key {
+	u32 __user *uaddr;
 	struct {
 		unsigned long pgoff;
 		struct inode *inode;
@@ -125,7 +156,8 @@
 		int offset;
 	} both;
 };
-int get_futex_key(u32 __user *uaddr, union futex_key *key);
+int get_futex_key(u32 __user *uaddr, struct rw_semaphore *shared,
+		  union futex_key *key);
 void get_futex_key_refs(union futex_key *key);
 void drop_futex_key_refs(union futex_key *key);
 
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 2c65da7..f589559 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -413,6 +413,7 @@
 extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev);
 extern void add_partition(struct gendisk *, int, sector_t, sector_t, int);
 extern void delete_partition(struct gendisk *, int);
+extern void printk_all_partitions(void);
 
 extern struct gendisk *alloc_disk_node(int minors, int node_id);
 extern struct gendisk *alloc_disk(int minors);
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 97a36c3..0d2ef0b 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -176,10 +176,6 @@
 #define free_page(addr) free_pages((addr),0)
 
 void page_alloc_init(void);
-#ifdef CONFIG_NUMA
-void drain_node_pages(int node);
-#else
-static inline void drain_node_pages(int node) { };
-#endif
+void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp);
 
 #endif /* __LINUX_GFP_H */
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index a515eb0..98e2cce 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -94,17 +94,26 @@
 
 /*
  * Same but also flushes aliased cache contents to RAM.
+ *
+ * This must be a macro because KM_USER0 and friends aren't defined if
+ * !CONFIG_HIGHMEM
  */
-static inline void memclear_highpage_flush(struct page *page, unsigned int offset, unsigned int size)
+#define zero_user_page(page, offset, size, km_type)		\
+	do {							\
+		void *kaddr;					\
+								\
+		BUG_ON((offset) + (size) > PAGE_SIZE);		\
+								\
+		kaddr = kmap_atomic(page, km_type);		\
+		memset((char *)kaddr + (offset), 0, (size));	\
+		flush_dcache_page(page);			\
+		kunmap_atomic(kaddr, (km_type));		\
+	} while (0)
+
+static inline void __deprecated memclear_highpage_flush(struct page *page,
+			unsigned int offset, unsigned int size)
 {
-	void *kaddr;
-
-	BUG_ON(offset + size > PAGE_SIZE);
-
-	kaddr = kmap_atomic(page, KM_USER0);
-	memset((char *)kaddr + offset, 0, size);
-	flush_dcache_page(page);
-	kunmap_atomic(kaddr, KM_USER0);
+	zero_user_page(page, offset, size, KM_USER0);
 }
 
 #ifndef __HAVE_ARCH_COPY_USER_HIGHPAGE
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index 7951023..45170b2 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -95,7 +95,7 @@
 #define INIT_TASK(tsk)	\
 {									\
 	.state		= 0,						\
-	.thread_info	= &init_thread_info,				\
+	.stack		= &init_thread_info,				\
 	.usage		= ATOMIC_INIT(2),				\
 	.flags		= 0,						\
 	.lock_depth	= -1,						\
diff --git a/include/linux/kthread.h b/include/linux/kthread.h
index 1c65e7a..00dd957 100644
--- a/include/linux/kthread.h
+++ b/include/linux/kthread.h
@@ -30,4 +30,7 @@
 int kthread_stop(struct task_struct *k);
 int kthread_should_stop(void);
 
+int kthreadd(void *unused);
+extern struct task_struct *kthreadd_task;
+
 #endif /* _LINUX_KTHREAD_H */
diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index 81bb9c7..c762954 100644
--- a/include/linux/ktime.h
+++ b/include/linux/ktime.h
@@ -43,7 +43,7 @@
  * plain scalar nanosecond based representation can be selected by the
  * config switch CONFIG_KTIME_SCALAR.
  */
-typedef union {
+union ktime {
 	s64	tv64;
 #if BITS_PER_LONG != 64 && !defined(CONFIG_KTIME_SCALAR)
 	struct {
@@ -54,7 +54,9 @@
 # endif
 	} tv;
 #endif
-} ktime_t;
+};
+
+typedef union ktime ktime_t;		/* Kill this */
 
 #define KTIME_MAX			((s64)~((u64)1 << 63))
 #if (BITS_PER_LONG == 64)
diff --git a/include/linux/mca.h b/include/linux/mca.h
index 5cff292..3797270 100644
--- a/include/linux/mca.h
+++ b/include/linux/mca.h
@@ -94,6 +94,7 @@
 struct mca_driver {
 	const short		*id_table;
 	void			*driver_data;
+	int			integrated_id;
 	struct device_driver	driver;
 };
 #define to_mca_driver(mdriver) container_of(mdriver, struct mca_driver, driver)
@@ -125,6 +126,7 @@
 extern struct bus_type mca_bus_type;
 
 extern int mca_register_driver(struct mca_driver *drv);
+extern int mca_register_driver_integrated(struct mca_driver *, int);
 extern void mca_unregister_driver(struct mca_driver *drv);
 
 /* WARNING: only called by the boot time device setup */
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 2f1544e..d09b134 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -83,6 +83,9 @@
 
 struct per_cpu_pageset {
 	struct per_cpu_pages pcp[2];	/* 0: hot.  1: cold */
+#ifdef CONFIG_NUMA
+	s8 expire;
+#endif
 #ifdef CONFIG_SMP
 	s8 stat_threshold;
 	s8 vm_stat_diff[NR_VM_ZONE_STAT_ITEMS];
diff --git a/include/linux/module.h b/include/linux/module.h
index 6d3dc9c..792d483 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -356,6 +356,9 @@
 	   keeping pointers to this stuff */
 	char *args;
 };
+#ifndef MODULE_ARCH_INIT
+#define MODULE_ARCH_INIT {}
+#endif
 
 /* FIXME: It'd be nice to isolate modules during init, too, so they
    aren't used before they (may) fail.  But presently too much code
diff --git a/include/linux/mutex.h b/include/linux/mutex.h
index b81bc2a..0d50ea3 100644
--- a/include/linux/mutex.h
+++ b/include/linux/mutex.h
@@ -121,11 +121,12 @@
  * Also see Documentation/mutex-design.txt.
  */
 extern void fastcall mutex_lock(struct mutex *lock);
-extern int fastcall mutex_lock_interruptible(struct mutex *lock);
+extern int __must_check fastcall mutex_lock_interruptible(struct mutex *lock);
 
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 extern void mutex_lock_nested(struct mutex *lock, unsigned int subclass);
-extern int mutex_lock_interruptible_nested(struct mutex *lock, unsigned int subclass);
+extern int __must_check mutex_lock_interruptible_nested(struct mutex *lock,
+					unsigned int subclass);
 #else
 # define mutex_lock_nested(lock, subclass) mutex_lock(lock)
 # define mutex_lock_interruptible_nested(lock, subclass) mutex_lock_interruptible(lock)
diff --git a/include/linux/nfs4_acl.h b/include/linux/nfs4_acl.h
index 409b6e0..c9c05a7 100644
--- a/include/linux/nfs4_acl.h
+++ b/include/linux/nfs4_acl.h
@@ -44,7 +44,6 @@
 #define NFS4_ACL_MAX 170
 
 struct nfs4_acl *nfs4_acl_new(int);
-void nfs4_acl_add_ace(struct nfs4_acl *, u32, u32, u32, int, uid_t);
 int nfs4_acl_get_whotype(char *, u32);
 int nfs4_acl_write_who(int who, char *p);
 int nfs4_acl_permission(struct nfs4_acl *acl, uid_t owner, gid_t group,
diff --git a/include/linux/notifier.h b/include/linux/notifier.h
index 10a43ed..9431101 100644
--- a/include/linux/notifier.h
+++ b/include/linux/notifier.h
@@ -112,32 +112,40 @@
 
 #ifdef __KERNEL__
 
-extern int atomic_notifier_chain_register(struct atomic_notifier_head *,
-		struct notifier_block *);
-extern int blocking_notifier_chain_register(struct blocking_notifier_head *,
-		struct notifier_block *);
-extern int raw_notifier_chain_register(struct raw_notifier_head *,
-		struct notifier_block *);
-extern int srcu_notifier_chain_register(struct srcu_notifier_head *,
-		struct notifier_block *);
+extern int atomic_notifier_chain_register(struct atomic_notifier_head *nh,
+		struct notifier_block *nb);
+extern int blocking_notifier_chain_register(struct blocking_notifier_head *nh,
+		struct notifier_block *nb);
+extern int raw_notifier_chain_register(struct raw_notifier_head *nh,
+		struct notifier_block *nb);
+extern int srcu_notifier_chain_register(struct srcu_notifier_head *nh,
+		struct notifier_block *nb);
 
-extern int atomic_notifier_chain_unregister(struct atomic_notifier_head *,
-		struct notifier_block *);
-extern int blocking_notifier_chain_unregister(struct blocking_notifier_head *,
-		struct notifier_block *);
-extern int raw_notifier_chain_unregister(struct raw_notifier_head *,
-		struct notifier_block *);
-extern int srcu_notifier_chain_unregister(struct srcu_notifier_head *,
-		struct notifier_block *);
+extern int atomic_notifier_chain_unregister(struct atomic_notifier_head *nh,
+		struct notifier_block *nb);
+extern int blocking_notifier_chain_unregister(struct blocking_notifier_head *nh,
+		struct notifier_block *nb);
+extern int raw_notifier_chain_unregister(struct raw_notifier_head *nh,
+		struct notifier_block *nb);
+extern int srcu_notifier_chain_unregister(struct srcu_notifier_head *nh,
+		struct notifier_block *nb);
 
-extern int atomic_notifier_call_chain(struct atomic_notifier_head *,
+extern int atomic_notifier_call_chain(struct atomic_notifier_head *nh,
 		unsigned long val, void *v);
-extern int blocking_notifier_call_chain(struct blocking_notifier_head *,
+extern int __atomic_notifier_call_chain(struct atomic_notifier_head *nh,
+	unsigned long val, void *v, int nr_to_call, int *nr_calls);
+extern int blocking_notifier_call_chain(struct blocking_notifier_head *nh,
 		unsigned long val, void *v);
-extern int raw_notifier_call_chain(struct raw_notifier_head *,
+extern int __blocking_notifier_call_chain(struct blocking_notifier_head *nh,
+	unsigned long val, void *v, int nr_to_call, int *nr_calls);
+extern int raw_notifier_call_chain(struct raw_notifier_head *nh,
 		unsigned long val, void *v);
-extern int srcu_notifier_call_chain(struct srcu_notifier_head *,
+extern int __raw_notifier_call_chain(struct raw_notifier_head *nh,
+	unsigned long val, void *v, int nr_to_call, int *nr_calls);
+extern int srcu_notifier_call_chain(struct srcu_notifier_head *nh,
 		unsigned long val, void *v);
+extern int __srcu_notifier_call_chain(struct srcu_notifier_head *nh,
+	unsigned long val, void *v, int nr_to_call, int *nr_calls);
 
 #define NOTIFY_DONE		0x0000		/* Don't care */
 #define NOTIFY_OK		0x0001		/* Suits me */
@@ -186,6 +194,20 @@
 #define CPU_DOWN_PREPARE	0x0005 /* CPU (unsigned)v going down */
 #define CPU_DOWN_FAILED		0x0006 /* CPU (unsigned)v NOT going down */
 #define CPU_DEAD		0x0007 /* CPU (unsigned)v dead */
+#define CPU_LOCK_ACQUIRE	0x0008 /* Acquire all hotcpu locks */
+#define CPU_LOCK_RELEASE	0x0009 /* Release all hotcpu locks */
+
+/* Used for CPU hotplug events occuring while tasks are frozen due to a suspend
+ * operation in progress
+ */
+#define CPU_TASKS_FROZEN	0x0010
+
+#define CPU_ONLINE_FROZEN	(CPU_ONLINE | CPU_TASKS_FROZEN)
+#define CPU_UP_PREPARE_FROZEN	(CPU_UP_PREPARE | CPU_TASKS_FROZEN)
+#define CPU_UP_CANCELED_FROZEN	(CPU_UP_CANCELED | CPU_TASKS_FROZEN)
+#define CPU_DOWN_PREPARE_FROZEN	(CPU_DOWN_PREPARE | CPU_TASKS_FROZEN)
+#define CPU_DOWN_FAILED_FROZEN	(CPU_DOWN_FAILED | CPU_TASKS_FROZEN)
+#define CPU_DEAD_FROZEN		(CPU_DEAD | CPU_TASKS_FROZEN)
 
 #endif /* __KERNEL__ */
 #endif /* _LINUX_NOTIFIER_H */
diff --git a/include/linux/pm.h b/include/linux/pm.h
index 6e8fa30..87545e0 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -107,26 +107,11 @@
 #define PM_SUSPEND_ON		((__force suspend_state_t) 0)
 #define PM_SUSPEND_STANDBY	((__force suspend_state_t) 1)
 #define PM_SUSPEND_MEM		((__force suspend_state_t) 3)
-#define PM_SUSPEND_DISK		((__force suspend_state_t) 4)
-#define PM_SUSPEND_MAX		((__force suspend_state_t) 5)
-
-typedef int __bitwise suspend_disk_method_t;
-
-/* invalid must be 0 so struct pm_ops initialisers can leave it out */
-#define PM_DISK_INVALID		((__force suspend_disk_method_t) 0)
-#define	PM_DISK_PLATFORM	((__force suspend_disk_method_t) 1)
-#define	PM_DISK_SHUTDOWN	((__force suspend_disk_method_t) 2)
-#define	PM_DISK_REBOOT		((__force suspend_disk_method_t) 3)
-#define	PM_DISK_TEST		((__force suspend_disk_method_t) 4)
-#define	PM_DISK_TESTPROC	((__force suspend_disk_method_t) 5)
-#define	PM_DISK_MAX		((__force suspend_disk_method_t) 6)
+#define PM_SUSPEND_MAX		((__force suspend_state_t) 4)
 
 /**
  * struct pm_ops - Callbacks for managing platform dependent suspend states.
  * @valid: Callback to determine whether the given state can be entered.
- * 	If %CONFIG_SOFTWARE_SUSPEND is set then %PM_SUSPEND_DISK is
- *	always valid and never passed to this call. If not assigned,
- *	no suspend states are valid.
  *	Valid states are advertised in /sys/power/state but can still
  *	be rejected by prepare or enter if the conditions aren't right.
  *	There is a %pm_valid_only_mem function available that can be assigned
@@ -140,24 +125,12 @@
  *
  * @finish: Called when the system has left the given state and all devices
  *	are resumed. The return value is ignored.
- *
- * @pm_disk_mode: The generic code always allows one of the shutdown methods
- *	%PM_DISK_SHUTDOWN, %PM_DISK_REBOOT, %PM_DISK_TEST and
- *	%PM_DISK_TESTPROC. If this variable is set, the mode it is set
- *	to is allowed in addition to those modes and is also made default.
- *	When this mode is sent selected, the @prepare call will be called
- *	before suspending to disk (if present), the @enter call should be
- *	present and will be called after all state has been saved and the
- *	machine is ready to be powered off; the @finish callback is called
- *	after state has been restored. All these calls are called with
- *	%PM_SUSPEND_DISK as the state.
  */
 struct pm_ops {
 	int (*valid)(suspend_state_t state);
 	int (*prepare)(suspend_state_t state);
 	int (*enter)(suspend_state_t state);
 	int (*finish)(suspend_state_t state);
-	suspend_disk_method_t pm_disk_mode;
 };
 
 /**
@@ -276,8 +249,6 @@
 extern void device_resume(void);
 
 #ifdef CONFIG_PM
-extern suspend_disk_method_t pm_disk_mode;
-
 extern int device_suspend(pm_message_t state);
 extern int device_prepare_suspend(pm_message_t state);
 
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index de72c49..a121f36 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -201,7 +201,6 @@
 	struct mutex			reconfig_mutex;
 	atomic_t			active;
 
-	int				changed;	/* true if we might need to reread partition info */
 	int				degraded;	/* whether md should consider
 							 * adding a spare
 							 */
diff --git a/include/linux/relay.h b/include/linux/relay.h
index 759a0f9..6cd8c44 100644
--- a/include/linux/relay.h
+++ b/include/linux/relay.h
@@ -12,6 +12,7 @@
 
 #include <linux/types.h>
 #include <linux/sched.h>
+#include <linux/timer.h>
 #include <linux/wait.h>
 #include <linux/list.h>
 #include <linux/fs.h>
@@ -38,7 +39,7 @@
 	size_t subbufs_consumed;	/* count of sub-buffers consumed */
 	struct rchan *chan;		/* associated channel */
 	wait_queue_head_t read_wait;	/* reader wait queue */
-	struct delayed_work wake_readers; /* reader wake-up work struct */
+	struct timer_list timer; 	/* reader wake-up timer */
 	struct dentry *dentry;		/* channel file dentry */
 	struct kref kref;		/* channel buffer refcount */
 	struct page **page_array;	/* array of current buffer pages */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 3d95c48..17b72d8 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -817,7 +817,7 @@
 
 struct task_struct {
 	volatile long state;	/* -1 unrunnable, 0 runnable, >0 stopped */
-	struct thread_info *thread_info;
+	void *stack;
 	atomic_t usage;
 	unsigned int flags;	/* per process flags, defined below */
 	unsigned int ptrace;
@@ -1317,6 +1317,7 @@
 
 extern void proc_caches_init(void);
 extern void flush_signals(struct task_struct *);
+extern void ignore_signals(struct task_struct *);
 extern void flush_signal_handlers(struct task_struct *, int force_default);
 extern int dequeue_signal(struct task_struct *tsk, sigset_t *mask, siginfo_t *info);
 
@@ -1512,8 +1513,8 @@
 
 #ifndef __HAVE_THREAD_FUNCTIONS
 
-#define task_thread_info(task) (task)->thread_info
-#define task_stack_page(task) ((void*)((task)->thread_info))
+#define task_thread_info(task)	((struct thread_info *)(task)->stack)
+#define task_stack_page(task)	((task)->stack)
 
 static inline void setup_thread_stack(struct task_struct *p, struct task_struct *org)
 {
@@ -1523,7 +1524,7 @@
 
 static inline unsigned long *end_of_stack(struct task_struct *p)
 {
-	return (unsigned long *)(p->thread_info + 1);
+	return (unsigned long *)(task_thread_info(p) + 1);
 }
 
 #endif
diff --git a/include/linux/signal.h b/include/linux/signal.h
index 1474905..3fa0fab 100644
--- a/include/linux/signal.h
+++ b/include/linux/signal.h
@@ -243,6 +243,131 @@
 
 extern struct kmem_cache *sighand_cachep;
 
+/*
+ * In POSIX a signal is sent either to a specific thread (Linux task)
+ * or to the process as a whole (Linux thread group).  How the signal
+ * is sent determines whether it's to one thread or the whole group,
+ * which determines which signal mask(s) are involved in blocking it
+ * from being delivered until later.  When the signal is delivered,
+ * either it's caught or ignored by a user handler or it has a default
+ * effect that applies to the whole thread group (POSIX process).
+ *
+ * The possible effects an unblocked signal set to SIG_DFL can have are:
+ *   ignore	- Nothing Happens
+ *   terminate	- kill the process, i.e. all threads in the group,
+ * 		  similar to exit_group.  The group leader (only) reports
+ *		  WIFSIGNALED status to its parent.
+ *   coredump	- write a core dump file describing all threads using
+ *		  the same mm and then kill all those threads
+ *   stop 	- stop all the threads in the group, i.e. TASK_STOPPED state
+ *
+ * SIGKILL and SIGSTOP cannot be caught, blocked, or ignored.
+ * Other signals when not blocked and set to SIG_DFL behaves as follows.
+ * The job control signals also have other special effects.
+ *
+ *	+--------------------+------------------+
+ *	|  POSIX signal      |  default action  |
+ *	+--------------------+------------------+
+ *	|  SIGHUP            |  terminate	|
+ *	|  SIGINT            |	terminate	|
+ *	|  SIGQUIT           |	coredump 	|
+ *	|  SIGILL            |	coredump 	|
+ *	|  SIGTRAP           |	coredump 	|
+ *	|  SIGABRT/SIGIOT    |	coredump 	|
+ *	|  SIGBUS            |	coredump 	|
+ *	|  SIGFPE            |	coredump 	|
+ *	|  SIGKILL           |	terminate(+)	|
+ *	|  SIGUSR1           |	terminate	|
+ *	|  SIGSEGV           |	coredump 	|
+ *	|  SIGUSR2           |	terminate	|
+ *	|  SIGPIPE           |	terminate	|
+ *	|  SIGALRM           |	terminate	|
+ *	|  SIGTERM           |	terminate	|
+ *	|  SIGCHLD           |	ignore   	|
+ *	|  SIGCONT           |	ignore(*)	|
+ *	|  SIGSTOP           |	stop(*)(+)  	|
+ *	|  SIGTSTP           |	stop(*)  	|
+ *	|  SIGTTIN           |	stop(*)  	|
+ *	|  SIGTTOU           |	stop(*)  	|
+ *	|  SIGURG            |	ignore   	|
+ *	|  SIGXCPU           |	coredump 	|
+ *	|  SIGXFSZ           |	coredump 	|
+ *	|  SIGVTALRM         |	terminate	|
+ *	|  SIGPROF           |	terminate	|
+ *	|  SIGPOLL/SIGIO     |	terminate	|
+ *	|  SIGSYS/SIGUNUSED  |	coredump 	|
+ *	|  SIGSTKFLT         |	terminate	|
+ *	|  SIGWINCH          |	ignore   	|
+ *	|  SIGPWR            |	terminate	|
+ *	|  SIGRTMIN-SIGRTMAX |	terminate       |
+ *	+--------------------+------------------+
+ *	|  non-POSIX signal  |  default action  |
+ *	+--------------------+------------------+
+ *	|  SIGEMT            |  coredump	|
+ *	+--------------------+------------------+
+ *
+ * (+) For SIGKILL and SIGSTOP the action is "always", not just "default".
+ * (*) Special job control effects:
+ * When SIGCONT is sent, it resumes the process (all threads in the group)
+ * from TASK_STOPPED state and also clears any pending/queued stop signals
+ * (any of those marked with "stop(*)").  This happens regardless of blocking,
+ * catching, or ignoring SIGCONT.  When any stop signal is sent, it clears
+ * any pending/queued SIGCONT signals; this happens regardless of blocking,
+ * catching, or ignored the stop signal, though (except for SIGSTOP) the
+ * default action of stopping the process may happen later or never.
+ */
+
+#ifdef SIGEMT
+#define SIGEMT_MASK	rt_sigmask(SIGEMT)
+#else
+#define SIGEMT_MASK	0
+#endif
+
+#if SIGRTMIN > BITS_PER_LONG
+#define rt_sigmask(sig)	(1ULL << ((sig)-1))
+#else
+#define rt_sigmask(sig)	sigmask(sig)
+#endif
+#define siginmask(sig, mask) (rt_sigmask(sig) & (mask))
+
+#define SIG_KERNEL_ONLY_MASK (\
+	rt_sigmask(SIGKILL)   |  rt_sigmask(SIGSTOP))
+
+#define SIG_KERNEL_STOP_MASK (\
+	rt_sigmask(SIGSTOP)   |  rt_sigmask(SIGTSTP)   | \
+	rt_sigmask(SIGTTIN)   |  rt_sigmask(SIGTTOU)   )
+
+#define SIG_KERNEL_COREDUMP_MASK (\
+        rt_sigmask(SIGQUIT)   |  rt_sigmask(SIGILL)    | \
+	rt_sigmask(SIGTRAP)   |  rt_sigmask(SIGABRT)   | \
+        rt_sigmask(SIGFPE)    |  rt_sigmask(SIGSEGV)   | \
+	rt_sigmask(SIGBUS)    |  rt_sigmask(SIGSYS)    | \
+        rt_sigmask(SIGXCPU)   |  rt_sigmask(SIGXFSZ)   | \
+	SIGEMT_MASK				       )
+
+#define SIG_KERNEL_IGNORE_MASK (\
+        rt_sigmask(SIGCONT)   |  rt_sigmask(SIGCHLD)   | \
+	rt_sigmask(SIGWINCH)  |  rt_sigmask(SIGURG)    )
+
+#define sig_kernel_only(sig) \
+	(((sig) < SIGRTMIN) && siginmask(sig, SIG_KERNEL_ONLY_MASK))
+#define sig_kernel_coredump(sig) \
+	(((sig) < SIGRTMIN) && siginmask(sig, SIG_KERNEL_COREDUMP_MASK))
+#define sig_kernel_ignore(sig) \
+	(((sig) < SIGRTMIN) && siginmask(sig, SIG_KERNEL_IGNORE_MASK))
+#define sig_kernel_stop(sig) \
+	(((sig) < SIGRTMIN) && siginmask(sig, SIG_KERNEL_STOP_MASK))
+
+#define sig_needs_tasklist(sig)	((sig) == SIGCONT)
+
+#define sig_user_defined(t, signr) \
+	(((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_DFL) &&	\
+	 ((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_IGN))
+
+#define sig_fatal(t, signr) \
+	(!siginmask(signr, SIG_KERNEL_IGNORE_MASK|SIG_KERNEL_STOP_MASK) && \
+	 (t)->sighand->action[(signr)-1].sa.sa_handler == SIG_DFL)
+
 #endif /* __KERNEL__ */
 
 #endif /* _LINUX_SIGNAL_H */
diff --git a/include/linux/smp.h b/include/linux/smp.h
index 7ba23ec..3f70149 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -83,7 +83,6 @@
  *	These macros fold the SMP functionality into a single CPU system
  */
 #define raw_smp_processor_id()			0
-#define hard_smp_processor_id()			0
 static inline int up_smp_call_function(void)
 {
 	return 0;
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index 35fa4d5..4a7ae8a 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -396,4 +396,23 @@
 
 #define	RPC_MAX_ADDRBUFLEN	(63U)
 
+/*
+ * When we want to reduce the size of the reserved space in the response
+ * buffer, we need to take into account the size of any checksum data that
+ * may be at the end of the packet. This is difficult to determine exactly
+ * for all cases without actually generating the checksum, so we just use a
+ * static value.
+ */
+static inline void
+svc_reserve_auth(struct svc_rqst *rqstp, int space)
+{
+	int			added_space = 0;
+
+	switch(rqstp->rq_authop->flavour) {
+		case RPC_AUTH_GSS:
+			added_space = RPC_MAX_AUTH_SIZE;
+	}
+	return svc_reserve(rqstp, space + added_space);
+}
+
 #endif /* SUNRPC_SVC_H */
diff --git a/include/linux/sunrpc/svcsock.h b/include/linux/sunrpc/svcsock.h
index 79096875..e21dd93 100644
--- a/include/linux/sunrpc/svcsock.h
+++ b/include/linux/sunrpc/svcsock.h
@@ -37,7 +37,8 @@
 
 	atomic_t    	    	sk_reserved;	/* space on outq that is reserved */
 
-	spinlock_t		sk_defer_lock;	/* protects sk_deferred */
+	spinlock_t		sk_lock;	/* protects sk_deferred and
+						 * sk_info_authunix */
 	struct list_head	sk_deferred;	/* deferred requests that need to
 						 * be revisted */
 	struct mutex		sk_mutex;	/* to serialize sending data */
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 9d2aa1a..d74da91 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -32,6 +32,24 @@
 static inline void pm_restore_console(void) {}
 #endif
 
+/**
+ * struct hibernation_ops - hibernation platform support
+ *
+ * The methods in this structure allow a platform to override the default
+ * mechanism of shutting down the machine during a hibernation transition.
+ *
+ * All three methods must be assigned.
+ *
+ * @prepare: prepare system for hibernation
+ * @enter: shut down system after state has been saved to disk
+ * @finish: finish/clean up after state has been reloaded
+ */
+struct hibernation_ops {
+	int (*prepare)(void);
+	int (*enter)(void);
+	void (*finish)(void);
+};
+
 #if defined(CONFIG_PM) && defined(CONFIG_SOFTWARE_SUSPEND)
 /* kernel/power/snapshot.c */
 extern void __init register_nosave_region(unsigned long, unsigned long);
@@ -39,11 +57,17 @@
 extern void swsusp_set_page_free(struct page *);
 extern void swsusp_unset_page_free(struct page *);
 extern unsigned long get_safe_page(gfp_t gfp_mask);
+
+extern void hibernation_set_ops(struct hibernation_ops *ops);
+extern int hibernate(void);
 #else
 static inline void register_nosave_region(unsigned long b, unsigned long e) {}
 static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
 static inline void swsusp_set_page_free(struct page *p) {}
 static inline void swsusp_unset_page_free(struct page *p) {}
+
+static inline void hibernation_set_ops(struct hibernation_ops *ops) {}
+static inline int hibernate(void) { return -ENOSYS; }
 #endif /* defined(CONFIG_PM) && defined(CONFIG_SOFTWARE_SUSPEND) */
 
 void save_processor_state(void);
diff --git a/include/linux/svga.h b/include/linux/svga.h
index e1cc552..13ad0b8 100644
--- a/include/linux/svga.h
+++ b/include/linux/svga.h
@@ -113,6 +113,8 @@
 void svga_tileblit(struct fb_info *info, struct fb_tileblit *blit);
 void svga_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor);
 int svga_get_tilemax(struct fb_info *info);
+void svga_get_caps(struct fb_info *info, struct fb_blit_caps *caps,
+		   struct fb_var_screeninfo *var);
 
 int svga_compute_pll(const struct svga_pll *pll, u32 f_wanted, u16 *m, u16 *n, u16 *r, int node);
 int svga_check_timings(const struct svga_timing_regs *tm, struct fb_var_screeninfo *var, int node);
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 1912c6c..3139f44 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -576,6 +576,8 @@
 			       struct stat64 __user *statbuf, int flag);
 asmlinkage long sys_readlinkat(int dfd, const char __user *path, char __user *buf,
 			       int bufsiz);
+asmlinkage long sys_utimensat(int dfd, char __user *filename,
+				struct timespec __user *utimes, int flags);
 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename,
 				     struct compat_timeval __user *t);
 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user * filename,
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index acb1f10..d9325cf 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -212,8 +212,6 @@
 extern void __dec_zone_state(struct zone *, enum zone_stat_item);
 
 void refresh_cpu_vm_stats(int);
-void refresh_vm_stats(void);
-
 #else /* CONFIG_SMP */
 
 /*
@@ -260,7 +258,6 @@
 #define mod_zone_page_state __mod_zone_page_state
 
 static inline void refresh_cpu_vm_stats(int cpu) { }
-static inline void refresh_vm_stats(void) { }
 #endif
 
 #endif /* _LINUX_VMSTAT_H */
diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index f16ba1e..d555f31 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -24,15 +24,13 @@
 struct work_struct {
 	atomic_long_t data;
 #define WORK_STRUCT_PENDING 0		/* T if work item pending execution */
-#define WORK_STRUCT_NOAUTOREL 1		/* F if work item automatically released on exec */
 #define WORK_STRUCT_FLAG_MASK (3UL)
 #define WORK_STRUCT_WQ_DATA_MASK (~WORK_STRUCT_FLAG_MASK)
 	struct list_head entry;
 	work_func_t func;
 };
 
-#define WORK_DATA_INIT(autorelease) \
-	ATOMIC_LONG_INIT((autorelease) << WORK_STRUCT_NOAUTOREL)
+#define WORK_DATA_INIT()	ATOMIC_LONG_INIT(0)
 
 struct delayed_work {
 	struct work_struct work;
@@ -44,14 +42,8 @@
 };
 
 #define __WORK_INITIALIZER(n, f) {				\
-	.data = WORK_DATA_INIT(0),				\
-        .entry	= { &(n).entry, &(n).entry },			\
-	.func = (f),						\
-	}
-
-#define __WORK_INITIALIZER_NAR(n, f) {				\
-	.data = WORK_DATA_INIT(1),				\
-        .entry	= { &(n).entry, &(n).entry },			\
+	.data = WORK_DATA_INIT(),				\
+	.entry	= { &(n).entry, &(n).entry },			\
 	.func = (f),						\
 	}
 
@@ -60,23 +52,12 @@
 	.timer = TIMER_INITIALIZER(NULL, 0, 0),			\
 	}
 
-#define __DELAYED_WORK_INITIALIZER_NAR(n, f) {			\
-	.work = __WORK_INITIALIZER_NAR((n).work, (f)),		\
-	.timer = TIMER_INITIALIZER(NULL, 0, 0),			\
-	}
-
 #define DECLARE_WORK(n, f)					\
 	struct work_struct n = __WORK_INITIALIZER(n, f)
 
-#define DECLARE_WORK_NAR(n, f)					\
-	struct work_struct n = __WORK_INITIALIZER_NAR(n, f)
-
 #define DECLARE_DELAYED_WORK(n, f)				\
 	struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f)
 
-#define DECLARE_DELAYED_WORK_NAR(n, f)			\
-	struct dwork_struct n = __DELAYED_WORK_INITIALIZER_NAR(n, f)
-
 /*
  * initialize a work item's function pointer
  */
@@ -95,16 +76,9 @@
  * assignment of the work data initializer allows the compiler
  * to generate better code.
  */
-#define INIT_WORK(_work, _func)					\
-	do {							\
-		(_work)->data = (atomic_long_t) WORK_DATA_INIT(0);	\
-		INIT_LIST_HEAD(&(_work)->entry);		\
-		PREPARE_WORK((_work), (_func));			\
-	} while (0)
-
-#define INIT_WORK_NAR(_work, _func)					\
+#define INIT_WORK(_work, _func)						\
 	do {								\
-		(_work)->data = (atomic_long_t) WORK_DATA_INIT(1);	\
+		(_work)->data = (atomic_long_t) WORK_DATA_INIT();	\
 		INIT_LIST_HEAD(&(_work)->entry);			\
 		PREPARE_WORK((_work), (_func));				\
 	} while (0)
@@ -115,12 +89,6 @@
 		init_timer(&(_work)->timer);			\
 	} while (0)
 
-#define INIT_DELAYED_WORK_NAR(_work, _func)			\
-	do {							\
-		INIT_WORK_NAR(&(_work)->work, (_func));		\
-		init_timer(&(_work)->timer);			\
-	} while (0)
-
 #define INIT_DELAYED_WORK_DEFERRABLE(_work, _func)			\
 	do {							\
 		INIT_WORK(&(_work)->work, (_func));		\
@@ -143,24 +111,10 @@
 	work_pending(&(w)->work)
 
 /**
- * work_release - Release a work item under execution
- * @work: The work item to release
- *
- * This is used to release a work item that has been initialised with automatic
- * release mode disabled (WORK_STRUCT_NOAUTOREL is set).  This gives the work
- * function the opportunity to grab auxiliary data from the container of the
- * work_struct before clearing the pending bit as the work_struct may be
- * subject to deallocation the moment the pending bit is cleared.
- *
- * In such a case, this should be called in the work function after it has
- * fetched any data it may require from the containter of the work_struct.
- * After this function has been called, the work_struct may be scheduled for
- * further execution or it may be deallocated unless other precautions are
- * taken.
- *
- * This should also be used to release a delayed work item.
+ * work_clear_pending - for internal use only, mark a work item as not pending
+ * @work: The work item in question
  */
-#define work_release(work) \
+#define work_clear_pending(work) \
 	clear_bit(WORK_STRUCT_PENDING, work_data_bits(work))
 
 
@@ -174,27 +128,28 @@
 extern void destroy_workqueue(struct workqueue_struct *wq);
 
 extern int FASTCALL(queue_work(struct workqueue_struct *wq, struct work_struct *work));
-extern int FASTCALL(queue_delayed_work(struct workqueue_struct *wq, struct delayed_work *work, unsigned long delay));
+extern int FASTCALL(queue_delayed_work(struct workqueue_struct *wq,
+			struct delayed_work *work, unsigned long delay));
 extern int queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
-	struct delayed_work *work, unsigned long delay);
+			struct delayed_work *work, unsigned long delay);
+
 extern void FASTCALL(flush_workqueue(struct workqueue_struct *wq));
+extern void flush_scheduled_work(void);
 
 extern int FASTCALL(schedule_work(struct work_struct *work));
-extern int FASTCALL(run_scheduled_work(struct work_struct *work));
-extern int FASTCALL(schedule_delayed_work(struct delayed_work *work, unsigned long delay));
-
-extern int schedule_delayed_work_on(int cpu, struct delayed_work *work, unsigned long delay);
+extern int FASTCALL(schedule_delayed_work(struct delayed_work *work,
+					unsigned long delay));
+extern int schedule_delayed_work_on(int cpu, struct delayed_work *work,
+					unsigned long delay);
 extern int schedule_on_each_cpu(work_func_t func);
-extern void flush_scheduled_work(void);
 extern int current_is_keventd(void);
 extern int keventd_up(void);
 
 extern void init_workqueues(void);
-void cancel_rearming_delayed_work(struct delayed_work *work);
-void cancel_rearming_delayed_workqueue(struct workqueue_struct *,
-				       struct delayed_work *);
 int execute_in_process_context(work_func_t fn, struct execute_work *);
 
+extern void cancel_work_sync(struct work_struct *work);
+
 /*
  * Kill off a pending schedule_delayed_work().  Note that the work callback
  * function may still be running on return from cancel_delayed_work(), unless
@@ -207,8 +162,18 @@
 
 	ret = del_timer(&work->timer);
 	if (ret)
-		work_release(&work->work);
+		work_clear_pending(&work->work);
 	return ret;
 }
 
+extern void cancel_rearming_delayed_work(struct delayed_work *work);
+
+/* Obsolete. use cancel_rearming_delayed_work() */
+static inline
+void cancel_rearming_delayed_workqueue(struct workqueue_struct *wq,
+					struct delayed_work *work)
+{
+	cancel_rearming_delayed_work(work);
+}
+
 #endif
diff --git a/init/Kconfig b/init/Kconfig
index d0edf42..4ad6de1 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -504,6 +504,15 @@
 	  on EMBEDDED systems.  /proc/vmstat will only show page counts
 	  if VM event counters are disabled.
 
+config SLUB_DEBUG
+	default y
+	bool "Enable SLUB debugging support" if EMBEDDED
+	help
+	  SLUB has extensive debug support features. Disabling these can
+	  result in significant savings in code size. This also disables
+	  SLUB sysfs support. /sys/slab will not exist and there will be
+	  no support for cache validation etc.
+
 choice
 	prompt "Choose SLAB allocator"
 	default SLAB
@@ -514,9 +523,9 @@
 	bool "SLAB"
 	help
 	  The regular slab allocator that is established and known to work
-	  well in all environments. It organizes chache hot objects in
+	  well in all environments. It organizes cache hot objects in
 	  per cpu and per node queues. SLAB is the default choice for
-	  slab allocator.
+	  a slab allocator.
 
 config SLUB
 	depends on EXPERIMENTAL && !ARCH_USES_SLAB_PAGE_STRUCT
@@ -526,21 +535,20 @@
 	   instead of managing queues of cached objects (SLAB approach).
 	   Per cpu caching is realized using slabs of objects instead
 	   of queues of objects. SLUB can use memory efficiently
-	   way and has enhanced diagnostics.
+	   and has enhanced diagnostics.
 
 config SLOB
 #
-#	SLOB cannot support SMP because SLAB_DESTROY_BY_RCU does not work
-#	properly.
+#	SLOB does not support SMP because SLAB_DESTROY_BY_RCU is unsupported
 #
 	depends on EMBEDDED && !SMP && !SPARSEMEM
 	bool "SLOB (Simple Allocator)"
 	help
 	   SLOB replaces the SLAB allocator with a drastically simpler
 	   allocator.  SLOB is more space efficient that SLAB but does not
-	   scale well (single lock for all operations) and is more susceptible
-	   to fragmentation. SLOB it is a great choice to reduce
-	   memory usage and code size for embedded systems.
+	   scale well (single lock for all operations) and is also highly
+	   susceptible to fragmentation. SLUB can accomplish a higher object
+	   density. It is usually better to use SLUB instead of SLOB.
 
 endchoice
 
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 3f57ed4..46fe407 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -7,6 +7,7 @@
 #include <linux/root_dev.h>
 #include <linux/security.h>
 #include <linux/delay.h>
+#include <linux/genhd.h>
 #include <linux/mount.h>
 #include <linux/device.h>
 #include <linux/init.h>
@@ -308,17 +309,21 @@
 	        /*
 		 * Allow the user to distinguish between failed sys_open
 		 * and bad superblock on root device.
+		 * and give them a list of the available devices
 		 */
 #ifdef CONFIG_BLOCK
 		__bdevname(ROOT_DEV, b);
 #endif
 		printk("VFS: Cannot open root device \"%s\" or %s\n",
 				root_device_name, b);
-		printk("Please append a correct \"root=\" boot option\n");
+		printk("Please append a correct \"root=\" boot option; here are the available partitions:\n");
 
+		printk_all_partitions();
 		panic("VFS: Unable to mount root fs on %s", b);
 	}
 
+	printk("List of all partitions:\n");
+	printk_all_partitions();
 	printk("No filesystem could mount root, tried: ");
 	for (p = fs_names; *p; p += strlen(p)+1)
 		printk(" %s", p);
diff --git a/init/main.c b/init/main.c
index c1537e0..e8d080c 100644
--- a/init/main.c
+++ b/init/main.c
@@ -54,6 +54,7 @@
 #include <linux/lockdep.h>
 #include <linux/pid_namespace.h>
 #include <linux/device.h>
+#include <linux/kthread.h>
 
 #include <asm/io.h>
 #include <asm/bugs.h>
@@ -425,8 +426,12 @@
 static void noinline rest_init(void)
 	__releases(kernel_lock)
 {
+	int pid;
+
 	kernel_thread(kernel_init, NULL, CLONE_FS | CLONE_SIGHAND);
 	numa_default_policy();
+	pid = kernel_thread(kthreadd, NULL, CLONE_FS | CLONE_FILES);
+	kthreadd_task = find_task_by_pid(pid);
 	unlock_kernel();
 
 	/*
diff --git a/kernel/configs.c b/kernel/configs.c
index 8fa1fb2..e84d3f9 100644
--- a/kernel/configs.c
+++ b/kernel/configs.c
@@ -61,18 +61,9 @@
 ikconfig_read_current(struct file *file, char __user *buf,
 		      size_t len, loff_t * offset)
 {
-	loff_t pos = *offset;
-	ssize_t count;
-
-	if (pos >= kernel_config_data_size)
-		return 0;
-
-	count = min(len, (size_t)(kernel_config_data_size - pos));
-	if (copy_to_user(buf, kernel_config_data + MAGIC_SIZE + pos, count))
-		return -EFAULT;
-
-	*offset += count;
-	return count;
+	return simple_read_from_buffer(buf, len, offset,
+				       kernel_config_data + MAGIC_SIZE,
+				       kernel_config_data_size);
 }
 
 static const struct file_operations ikconfig_file_ops = {
diff --git a/kernel/cpu.c b/kernel/cpu.c
index 36e7084..208cf34 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -97,7 +97,7 @@
 		    (!cputime_eq(p->utime, cputime_zero) ||
 		     !cputime_eq(p->stime, cputime_zero)))
 			printk(KERN_WARNING "Task %s (pid = %d) is on cpu %d\
-				(state = %ld, flags = %lx) \n",
+				(state = %ld, flags = %x) \n",
 				 p->comm, p->pid, cpu, p->state, p->flags);
 	}
 	write_unlock_irq(&tasklist_lock);
@@ -120,11 +120,13 @@
 }
 
 /* Requires cpu_add_remove_lock to be held */
-static int _cpu_down(unsigned int cpu)
+static int _cpu_down(unsigned int cpu, int tasks_frozen)
 {
-	int err;
+	int err, nr_calls = 0;
 	struct task_struct *p;
 	cpumask_t old_allowed, tmp;
+	void *hcpu = (void *)(long)cpu;
+	unsigned long mod = tasks_frozen ? CPU_TASKS_FROZEN : 0;
 
 	if (num_online_cpus() == 1)
 		return -EBUSY;
@@ -132,12 +134,16 @@
 	if (!cpu_online(cpu))
 		return -EINVAL;
 
-	err = raw_notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE,
-						(void *)(long)cpu);
+	raw_notifier_call_chain(&cpu_chain, CPU_LOCK_ACQUIRE, hcpu);
+	err = __raw_notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE | mod,
+					hcpu, -1, &nr_calls);
 	if (err == NOTIFY_BAD) {
+		__raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED | mod,
+					  hcpu, nr_calls, NULL);
 		printk("%s: attempt to take down CPU %u failed\n",
 				__FUNCTION__, cpu);
-		return -EINVAL;
+		err = -EINVAL;
+		goto out_release;
 	}
 
 	/* Ensure that we are not runnable on dying cpu */
@@ -152,8 +158,8 @@
 
 	if (IS_ERR(p) || cpu_online(cpu)) {
 		/* CPU didn't die: tell everyone.  Can't complain. */
-		if (raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED,
-				(void *)(long)cpu) == NOTIFY_BAD)
+		if (raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED | mod,
+					    hcpu) == NOTIFY_BAD)
 			BUG();
 
 		if (IS_ERR(p)) {
@@ -170,13 +176,9 @@
 	/* This actually kills the CPU. */
 	__cpu_die(cpu);
 
-	/* Move it here so it can run. */
-	kthread_bind(p, get_cpu());
-	put_cpu();
-
 	/* CPU is completely dead: tell everyone.  Too late to complain. */
-	if (raw_notifier_call_chain(&cpu_chain, CPU_DEAD,
-			(void *)(long)cpu) == NOTIFY_BAD)
+	if (raw_notifier_call_chain(&cpu_chain, CPU_DEAD | mod,
+				    hcpu) == NOTIFY_BAD)
 		BUG();
 
 	check_for_tasks(cpu);
@@ -185,6 +187,8 @@
 	err = kthread_stop(p);
 out_allowed:
 	set_cpus_allowed(current, old_allowed);
+out_release:
+	raw_notifier_call_chain(&cpu_chain, CPU_LOCK_RELEASE, hcpu);
 	return err;
 }
 
@@ -196,7 +200,7 @@
 	if (cpu_hotplug_disabled)
 		err = -EBUSY;
 	else
-		err = _cpu_down(cpu);
+		err = _cpu_down(cpu, 0);
 
 	mutex_unlock(&cpu_add_remove_lock);
 	return err;
@@ -204,15 +208,18 @@
 #endif /*CONFIG_HOTPLUG_CPU*/
 
 /* Requires cpu_add_remove_lock to be held */
-static int __cpuinit _cpu_up(unsigned int cpu)
+static int __cpuinit _cpu_up(unsigned int cpu, int tasks_frozen)
 {
-	int ret;
+	int ret, nr_calls = 0;
 	void *hcpu = (void *)(long)cpu;
+	unsigned long mod = tasks_frozen ? CPU_TASKS_FROZEN : 0;
 
 	if (cpu_online(cpu) || !cpu_present(cpu))
 		return -EINVAL;
 
-	ret = raw_notifier_call_chain(&cpu_chain, CPU_UP_PREPARE, hcpu);
+	raw_notifier_call_chain(&cpu_chain, CPU_LOCK_ACQUIRE, hcpu);
+	ret = __raw_notifier_call_chain(&cpu_chain, CPU_UP_PREPARE | mod, hcpu,
+							-1, &nr_calls);
 	if (ret == NOTIFY_BAD) {
 		printk("%s: attempt to bring up CPU %u failed\n",
 				__FUNCTION__, cpu);
@@ -229,12 +236,13 @@
 	BUG_ON(!cpu_online(cpu));
 
 	/* Now call notifier in preparation. */
-	raw_notifier_call_chain(&cpu_chain, CPU_ONLINE, hcpu);
+	raw_notifier_call_chain(&cpu_chain, CPU_ONLINE | mod, hcpu);
 
 out_notify:
 	if (ret != 0)
-		raw_notifier_call_chain(&cpu_chain,
-				CPU_UP_CANCELED, hcpu);
+		__raw_notifier_call_chain(&cpu_chain,
+				CPU_UP_CANCELED | mod, hcpu, nr_calls, NULL);
+	raw_notifier_call_chain(&cpu_chain, CPU_LOCK_RELEASE, hcpu);
 
 	return ret;
 }
@@ -247,19 +255,13 @@
 	if (cpu_hotplug_disabled)
 		err = -EBUSY;
 	else
-		err = _cpu_up(cpu);
+		err = _cpu_up(cpu, 0);
 
 	mutex_unlock(&cpu_add_remove_lock);
 	return err;
 }
 
 #ifdef CONFIG_SUSPEND_SMP
-/* Needed to prevent the microcode driver from requesting firmware in its CPU
- * hotplug notifier during the suspend/resume.
- */
-int suspend_cpu_hotplug;
-EXPORT_SYMBOL(suspend_cpu_hotplug);
-
 static cpumask_t frozen_cpus;
 
 int disable_nonboot_cpus(void)
@@ -267,7 +269,6 @@
 	int cpu, first_cpu, error = 0;
 
 	mutex_lock(&cpu_add_remove_lock);
-	suspend_cpu_hotplug = 1;
 	first_cpu = first_cpu(cpu_online_map);
 	/* We take down all of the non-boot CPUs in one shot to avoid races
 	 * with the userspace trying to use the CPU hotplug at the same time
@@ -277,7 +278,7 @@
 	for_each_online_cpu(cpu) {
 		if (cpu == first_cpu)
 			continue;
-		error = _cpu_down(cpu);
+		error = _cpu_down(cpu, 1);
 		if (!error) {
 			cpu_set(cpu, frozen_cpus);
 			printk("CPU%d is down\n", cpu);
@@ -294,7 +295,6 @@
 	} else {
 		printk(KERN_ERR "Non-boot CPUs are not disabled\n");
 	}
-	suspend_cpu_hotplug = 0;
 	mutex_unlock(&cpu_add_remove_lock);
 	return error;
 }
@@ -309,10 +309,9 @@
 	if (cpus_empty(frozen_cpus))
 		goto out;
 
-	suspend_cpu_hotplug = 1;
 	printk("Enabling non-boot CPUs ...\n");
 	for_each_cpu_mask(cpu, frozen_cpus) {
-		error = _cpu_up(cpu);
+		error = _cpu_up(cpu, 1);
 		if (!error) {
 			printk("CPU%d is up\n", cpu);
 			continue;
@@ -320,7 +319,6 @@
 		printk(KERN_WARNING "Error taking CPU%d up: %d\n", cpu, error);
 	}
 	cpus_clear(frozen_cpus);
-	suspend_cpu_hotplug = 0;
 out:
 	mutex_unlock(&cpu_add_remove_lock);
 }
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 88b416d..f57854b 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -1772,12 +1772,7 @@
 {
 	struct ctr_struct *ctr = file->private_data;
 
-	if (*ppos + nbytes > ctr->bufsz)
-		nbytes = ctr->bufsz - *ppos;
-	if (copy_to_user(buf, ctr->buf + *ppos, nbytes))
-		return -EFAULT;
-	*ppos += nbytes;
-	return nbytes;
+	return simple_read_from_buffer(buf, nbytes, ppos, ctr->buf, ctr->bufsz);
 }
 
 static int cpuset_tasks_release(struct inode *unused_inode, struct file *file)
diff --git a/kernel/exit.c b/kernel/exit.c
index f5a7abb..b0c6f0c 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -26,6 +26,7 @@
 #include <linux/profile.h>
 #include <linux/mount.h>
 #include <linux/proc_fs.h>
+#include <linux/kthread.h>
 #include <linux/mempolicy.h>
 #include <linux/taskstats_kern.h>
 #include <linux/delayacct.h>
@@ -254,26 +255,25 @@
 }
 
 /**
- * reparent_to_init - Reparent the calling kernel thread to the init task of the pid space that the thread belongs to.
+ * reparent_to_kthreadd - Reparent the calling kernel thread to kthreadd
  *
  * If a kernel thread is launched as a result of a system call, or if
- * it ever exits, it should generally reparent itself to init so that
- * it is correctly cleaned up on exit.
+ * it ever exits, it should generally reparent itself to kthreadd so it
+ * isn't in the way of other processes and is correctly cleaned up on exit.
  *
  * The various task state such as scheduling policy and priority may have
  * been inherited from a user process, so we reset them to sane values here.
  *
- * NOTE that reparent_to_init() gives the caller full capabilities.
+ * NOTE that reparent_to_kthreadd() gives the caller full capabilities.
  */
-static void reparent_to_init(void)
+static void reparent_to_kthreadd(void)
 {
 	write_lock_irq(&tasklist_lock);
 
 	ptrace_unlink(current);
 	/* Reparent to init */
 	remove_parent(current);
-	current->parent = child_reaper(current);
-	current->real_parent = child_reaper(current);
+	current->real_parent = current->parent = kthreadd_task;
 	add_parent(current);
 
 	/* Set the exit signal to SIGCHLD so we signal init on exit */
@@ -347,7 +347,7 @@
 		return -EINVAL;
 
 	spin_lock_irq(&current->sighand->siglock);
-	sigaddset(&current->blocked, sig);
+	current->sighand->action[(sig)-1].sa.sa_handler = SIG_IGN;
 	recalc_sigpending();
 	spin_unlock_irq(&current->sighand->siglock);
 	return 0;
@@ -400,7 +400,7 @@
 	current->files = init_task.files;
 	atomic_inc(&current->files->count);
 
-	reparent_to_init();
+	reparent_to_kthreadd();
 }
 
 EXPORT_SYMBOL(daemonize);
diff --git a/kernel/fork.c b/kernel/fork.c
index a8dd75d..5dd3979 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -105,7 +105,7 @@
 
 void free_task(struct task_struct *tsk)
 {
-	free_thread_info(tsk->thread_info);
+	free_thread_info(tsk->stack);
 	rt_mutex_debug_task_free(tsk);
 	free_task_struct(tsk);
 }
@@ -175,7 +175,7 @@
 	}
 
 	*tsk = *orig;
-	tsk->thread_info = ti;
+	tsk->stack = ti;
 	setup_thread_stack(tsk, orig);
 
 #ifdef CONFIG_CC_STACKPROTECTOR
diff --git a/kernel/futex.c b/kernel/futex.c
index 600bc9d..b7ce15c 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -16,6 +16,9 @@
  *  Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
  *  Copyright (C) 2006 Timesys Corp., Thomas Gleixner <tglx@timesys.com>
  *
+ *  PRIVATE futexes by Eric Dumazet
+ *  Copyright (C) 2007 Eric Dumazet <dada1@cosmosbay.com>
+ *
  *  Thanks to Ben LaHaise for yelling "hashed waitqueues" loudly
  *  enough at me, Linus for the original (flawed) idea, Matthew
  *  Kirkwood for proof-of-concept implementation.
@@ -53,6 +56,12 @@
 
 #include "rtmutex_common.h"
 
+#ifdef CONFIG_DEBUG_RT_MUTEXES
+# include "rtmutex-debug.h"
+#else
+# include "rtmutex.h"
+#endif
+
 #define FUTEX_HASHBITS (CONFIG_BASE_SMALL ? 4 : 8)
 
 /*
@@ -81,12 +90,12 @@
  * we can wake only the relevant ones (hashed queues may be shared).
  *
  * A futex_q has a woken state, just like tasks have TASK_RUNNING.
- * It is considered woken when list_empty(&q->list) || q->lock_ptr == 0.
+ * It is considered woken when plist_node_empty(&q->list) || q->lock_ptr == 0.
  * The order of wakup is always to make the first condition true, then
  * wake up q->waiters, then make the second condition true.
  */
 struct futex_q {
-	struct list_head list;
+	struct plist_node list;
 	wait_queue_head_t waiters;
 
 	/* Which hash list lock to use: */
@@ -102,14 +111,20 @@
 	/* Optional priority inheritance state: */
 	struct futex_pi_state *pi_state;
 	struct task_struct *task;
+
+	/*
+	 * This waiter is used in case of requeue from a
+	 * normal futex to a PI-futex
+	 */
+	struct rt_mutex_waiter waiter;
 };
 
 /*
  * Split the global futex_lock into every hash list lock.
  */
 struct futex_hash_bucket {
-       spinlock_t              lock;
-       struct list_head       chain;
+	spinlock_t lock;
+	struct plist_head chain;
 };
 
 static struct futex_hash_bucket futex_queues[1<<FUTEX_HASHBITS];
@@ -138,19 +153,26 @@
 		&& key1->both.offset == key2->both.offset);
 }
 
-/*
- * Get parameters which are the keys for a futex.
+/**
+ * get_futex_key - Get parameters which are the keys for a futex.
+ * @uaddr: virtual address of the futex
+ * @shared: NULL for a PROCESS_PRIVATE futex,
+ *	&current->mm->mmap_sem for a PROCESS_SHARED futex
+ * @key: address where result is stored.
+ *
+ * Returns a negative error code or 0
+ * The key words are stored in *key on success.
  *
  * For shared mappings, it's (page->index, vma->vm_file->f_path.dentry->d_inode,
  * offset_within_page).  For private mappings, it's (uaddr, current->mm).
  * We can usually work out the index without swapping in the page.
  *
- * Returns: 0, or negative error code.
- * The key words are stored in *key on success.
- *
- * Should be called with &current->mm->mmap_sem but NOT any spinlocks.
+ * fshared is NULL for PROCESS_PRIVATE futexes
+ * For other futexes, it points to &current->mm->mmap_sem and
+ * caller must have taken the reader lock. but NOT any spinlocks.
  */
-int get_futex_key(u32 __user *uaddr, union futex_key *key)
+int get_futex_key(u32 __user *uaddr, struct rw_semaphore *fshared,
+		  union futex_key *key)
 {
 	unsigned long address = (unsigned long)uaddr;
 	struct mm_struct *mm = current->mm;
@@ -162,11 +184,25 @@
 	 * The futex address must be "naturally" aligned.
 	 */
 	key->both.offset = address % PAGE_SIZE;
-	if (unlikely((key->both.offset % sizeof(u32)) != 0))
+	if (unlikely((address % sizeof(u32)) != 0))
 		return -EINVAL;
 	address -= key->both.offset;
 
 	/*
+	 * PROCESS_PRIVATE futexes are fast.
+	 * As the mm cannot disappear under us and the 'key' only needs
+	 * virtual address, we dont even have to find the underlying vma.
+	 * Note : We do have to check 'uaddr' is a valid user address,
+	 *        but access_ok() should be faster than find_vma()
+	 */
+	if (!fshared) {
+		if (unlikely(!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))))
+			return -EFAULT;
+		key->private.mm = mm;
+		key->private.address = address;
+		return 0;
+	}
+	/*
 	 * The futex is hashed differently depending on whether
 	 * it's in a shared or private mapping.  So check vma first.
 	 */
@@ -180,6 +216,9 @@
 	if (unlikely((vma->vm_flags & (VM_IO|VM_READ)) != VM_READ))
 		return (vma->vm_flags & VM_IO) ? -EPERM : -EACCES;
 
+	/* Save the user address in the ley */
+	key->uaddr = uaddr;
+
 	/*
 	 * Private mappings are handled in a simple way.
 	 *
@@ -190,6 +229,7 @@
 	 * mappings of _writable_ handles.
 	 */
 	if (likely(!(vma->vm_flags & VM_MAYSHARE))) {
+		key->both.offset |= FUT_OFF_MMSHARED; /* reference taken on mm */
 		key->private.mm = mm;
 		key->private.address = address;
 		return 0;
@@ -199,7 +239,7 @@
 	 * Linear file mappings are also simple.
 	 */
 	key->shared.inode = vma->vm_file->f_path.dentry->d_inode;
-	key->both.offset++; /* Bit 0 of offset indicates inode-based key. */
+	key->both.offset |= FUT_OFF_INODE; /* inode-based key. */
 	if (likely(!(vma->vm_flags & VM_NONLINEAR))) {
 		key->shared.pgoff = (((address - vma->vm_start) >> PAGE_SHIFT)
 				     + vma->vm_pgoff);
@@ -227,16 +267,18 @@
  * Take a reference to the resource addressed by a key.
  * Can be called while holding spinlocks.
  *
- * NOTE: mmap_sem MUST be held between get_futex_key() and calling this
- * function, if it is called at all.  mmap_sem keeps key->shared.inode valid.
  */
 inline void get_futex_key_refs(union futex_key *key)
 {
-	if (key->both.ptr != 0) {
-		if (key->both.offset & 1)
+	if (key->both.ptr == 0)
+		return;
+	switch (key->both.offset & (FUT_OFF_INODE|FUT_OFF_MMSHARED)) {
+		case FUT_OFF_INODE:
 			atomic_inc(&key->shared.inode->i_count);
-		else
+			break;
+		case FUT_OFF_MMSHARED:
 			atomic_inc(&key->private.mm->mm_count);
+			break;
 	}
 }
 EXPORT_SYMBOL_GPL(get_futex_key_refs);
@@ -247,11 +289,15 @@
  */
 void drop_futex_key_refs(union futex_key *key)
 {
-	if (key->both.ptr != 0) {
-		if (key->both.offset & 1)
+	if (key->both.ptr == 0)
+		return;
+	switch (key->both.offset & (FUT_OFF_INODE|FUT_OFF_MMSHARED)) {
+		case FUT_OFF_INODE:
 			iput(key->shared.inode);
-		else
+			break;
+		case FUT_OFF_MMSHARED:
 			mmdrop(key->private.mm);
+			break;
 	}
 }
 EXPORT_SYMBOL_GPL(drop_futex_key_refs);
@@ -268,28 +314,38 @@
 }
 
 /*
- * Fault handling. Called with current->mm->mmap_sem held.
+ * Fault handling.
+ * if fshared is non NULL, current->mm->mmap_sem is already held
  */
-static int futex_handle_fault(unsigned long address, int attempt)
+static int futex_handle_fault(unsigned long address,
+			      struct rw_semaphore *fshared, int attempt)
 {
 	struct vm_area_struct * vma;
 	struct mm_struct *mm = current->mm;
+	int ret = -EFAULT;
 
-	if (attempt > 2 || !(vma = find_vma(mm, address)) ||
-	    vma->vm_start > address || !(vma->vm_flags & VM_WRITE))
-		return -EFAULT;
+	if (attempt > 2)
+		return ret;
 
-	switch (handle_mm_fault(mm, vma, address, 1)) {
-	case VM_FAULT_MINOR:
-		current->min_flt++;
-		break;
-	case VM_FAULT_MAJOR:
-		current->maj_flt++;
-		break;
-	default:
-		return -EFAULT;
+	if (!fshared)
+		down_read(&mm->mmap_sem);
+	vma = find_vma(mm, address);
+	if (vma && address >= vma->vm_start &&
+	    (vma->vm_flags & VM_WRITE)) {
+		switch (handle_mm_fault(mm, vma, address, 1)) {
+		case VM_FAULT_MINOR:
+			ret = 0;
+			current->min_flt++;
+			break;
+		case VM_FAULT_MAJOR:
+			ret = 0;
+			current->maj_flt++;
+			break;
+		}
 	}
-	return 0;
+	if (!fshared)
+		up_read(&mm->mmap_sem);
+	return ret;
 }
 
 /*
@@ -439,18 +495,19 @@
 }
 
 static int
-lookup_pi_state(u32 uval, struct futex_hash_bucket *hb, struct futex_q *me)
+lookup_pi_state(u32 uval, struct futex_hash_bucket *hb,
+		union futex_key *key, struct futex_pi_state **ps)
 {
 	struct futex_pi_state *pi_state = NULL;
 	struct futex_q *this, *next;
-	struct list_head *head;
+	struct plist_head *head;
 	struct task_struct *p;
 	pid_t pid;
 
 	head = &hb->chain;
 
-	list_for_each_entry_safe(this, next, head, list) {
-		if (match_futex(&this->key, &me->key)) {
+	plist_for_each_entry_safe(this, next, head, list) {
+		if (match_futex(&this->key, key)) {
 			/*
 			 * Another waiter already exists - bump up
 			 * the refcount and return its pi_state:
@@ -465,7 +522,7 @@
 			WARN_ON(!atomic_read(&pi_state->refcount));
 
 			atomic_inc(&pi_state->refcount);
-			me->pi_state = pi_state;
+			*ps = pi_state;
 
 			return 0;
 		}
@@ -492,7 +549,7 @@
 	rt_mutex_init_proxy_locked(&pi_state->pi_mutex, p);
 
 	/* Store the key for possible exit cleanups: */
-	pi_state->key = me->key;
+	pi_state->key = *key;
 
 	spin_lock_irq(&p->pi_lock);
 	WARN_ON(!list_empty(&pi_state->list));
@@ -502,7 +559,7 @@
 
 	put_task_struct(p);
 
-	me->pi_state = pi_state;
+	*ps = pi_state;
 
 	return 0;
 }
@@ -513,12 +570,12 @@
  */
 static void wake_futex(struct futex_q *q)
 {
-	list_del_init(&q->list);
+	plist_del(&q->list, &q->list.plist);
 	if (q->filp)
 		send_sigio(&q->filp->f_owner, q->fd, POLL_IN);
 	/*
 	 * The lock in wake_up_all() is a crucial memory barrier after the
-	 * list_del_init() and also before assigning to q->lock_ptr.
+	 * plist_del() and also before assigning to q->lock_ptr.
 	 */
 	wake_up_all(&q->waiters);
 	/*
@@ -562,6 +619,8 @@
 	 */
 	if (!(uval & FUTEX_OWNER_DIED)) {
 		newval = FUTEX_WAITERS | new_owner->pid;
+		/* Keep the FUTEX_WAITER_REQUEUED flag if it was set */
+		newval |= (uval & FUTEX_WAITER_REQUEUED);
 
 		pagefault_disable();
 		curval = futex_atomic_cmpxchg_inatomic(uaddr, uval, newval);
@@ -629,17 +688,19 @@
  * Wake up all waiters hashed on the physical page that is mapped
  * to this virtual address:
  */
-static int futex_wake(u32 __user *uaddr, int nr_wake)
+static int futex_wake(u32 __user *uaddr, struct rw_semaphore *fshared,
+		      int nr_wake)
 {
 	struct futex_hash_bucket *hb;
 	struct futex_q *this, *next;
-	struct list_head *head;
+	struct plist_head *head;
 	union futex_key key;
 	int ret;
 
-	down_read(&current->mm->mmap_sem);
+	if (fshared)
+		down_read(fshared);
 
-	ret = get_futex_key(uaddr, &key);
+	ret = get_futex_key(uaddr, fshared, &key);
 	if (unlikely(ret != 0))
 		goto out;
 
@@ -647,7 +708,7 @@
 	spin_lock(&hb->lock);
 	head = &hb->chain;
 
-	list_for_each_entry_safe(this, next, head, list) {
+	plist_for_each_entry_safe(this, next, head, list) {
 		if (match_futex (&this->key, &key)) {
 			if (this->pi_state) {
 				ret = -EINVAL;
@@ -661,7 +722,261 @@
 
 	spin_unlock(&hb->lock);
 out:
-	up_read(&current->mm->mmap_sem);
+	if (fshared)
+		up_read(fshared);
+	return ret;
+}
+
+/*
+ * Called from futex_requeue_pi.
+ * Set FUTEX_WAITERS and FUTEX_WAITER_REQUEUED flags on the
+ * PI-futex value; search its associated pi_state if an owner exist
+ * or create a new one without owner.
+ */
+static inline int
+lookup_pi_state_for_requeue(u32 __user *uaddr, struct futex_hash_bucket *hb,
+			    union futex_key *key,
+			    struct futex_pi_state **pi_state)
+{
+	u32 curval, uval, newval;
+
+retry:
+	/*
+	 * We can't handle a fault cleanly because we can't
+	 * release the locks here. Simply return the fault.
+	 */
+	if (get_futex_value_locked(&curval, uaddr))
+		return -EFAULT;
+
+	/* set the flags FUTEX_WAITERS and FUTEX_WAITER_REQUEUED */
+	if ((curval & (FUTEX_WAITERS | FUTEX_WAITER_REQUEUED))
+	    != (FUTEX_WAITERS | FUTEX_WAITER_REQUEUED)) {
+		/*
+		 * No waiters yet, we prepare the futex to have some waiters.
+		 */
+
+		uval = curval;
+		newval = uval | FUTEX_WAITERS | FUTEX_WAITER_REQUEUED;
+
+		pagefault_disable();
+		curval = futex_atomic_cmpxchg_inatomic(uaddr, uval, newval);
+		pagefault_enable();
+
+		if (unlikely(curval == -EFAULT))
+			return -EFAULT;
+		if (unlikely(curval != uval))
+			goto retry;
+	}
+
+	if (!(curval & FUTEX_TID_MASK)
+	    || lookup_pi_state(curval, hb, key, pi_state)) {
+		/* the futex has no owner (yet) or the lookup failed:
+		   allocate one pi_state without owner */
+
+		*pi_state = alloc_pi_state();
+
+		/* Already stores the key: */
+		(*pi_state)->key = *key;
+
+		/* init the mutex without owner */
+		__rt_mutex_init(&(*pi_state)->pi_mutex, NULL);
+	}
+
+	return 0;
+}
+
+/*
+ * Keep the first nr_wake waiter from futex1, wake up one,
+ * and requeue the next nr_requeue waiters following hashed on
+ * one physical page to another physical page (PI-futex uaddr2)
+ */
+static int futex_requeue_pi(u32 __user *uaddr1,
+			    struct rw_semaphore *fshared,
+			    u32 __user *uaddr2,
+			    int nr_wake, int nr_requeue, u32 *cmpval)
+{
+	union futex_key key1, key2;
+	struct futex_hash_bucket *hb1, *hb2;
+	struct plist_head *head1;
+	struct futex_q *this, *next;
+	struct futex_pi_state *pi_state2 = NULL;
+	struct rt_mutex_waiter *waiter, *top_waiter = NULL;
+	struct rt_mutex *lock2 = NULL;
+	int ret, drop_count = 0;
+
+	if (refill_pi_state_cache())
+		return -ENOMEM;
+
+retry:
+	/*
+	 * First take all the futex related locks:
+	 */
+	if (fshared)
+		down_read(fshared);
+
+	ret = get_futex_key(uaddr1, fshared, &key1);
+	if (unlikely(ret != 0))
+		goto out;
+	ret = get_futex_key(uaddr2, fshared, &key2);
+	if (unlikely(ret != 0))
+		goto out;
+
+	hb1 = hash_futex(&key1);
+	hb2 = hash_futex(&key2);
+
+	double_lock_hb(hb1, hb2);
+
+	if (likely(cmpval != NULL)) {
+		u32 curval;
+
+		ret = get_futex_value_locked(&curval, uaddr1);
+
+		if (unlikely(ret)) {
+			spin_unlock(&hb1->lock);
+			if (hb1 != hb2)
+				spin_unlock(&hb2->lock);
+
+			/*
+			 * If we would have faulted, release mmap_sem, fault
+			 * it in and start all over again.
+			 */
+			if (fshared)
+				up_read(fshared);
+
+			ret = get_user(curval, uaddr1);
+
+			if (!ret)
+				goto retry;
+
+			return ret;
+		}
+		if (curval != *cmpval) {
+			ret = -EAGAIN;
+			goto out_unlock;
+		}
+	}
+
+	head1 = &hb1->chain;
+	plist_for_each_entry_safe(this, next, head1, list) {
+		if (!match_futex (&this->key, &key1))
+			continue;
+		if (++ret <= nr_wake) {
+			wake_futex(this);
+		} else {
+			/*
+			 * FIRST: get and set the pi_state
+			 */
+			if (!pi_state2) {
+				int s;
+				/* do this only the first time we requeue someone */
+				s = lookup_pi_state_for_requeue(uaddr2, hb2,
+								&key2, &pi_state2);
+				if (s) {
+					ret = s;
+					goto out_unlock;
+				}
+
+				lock2 = &pi_state2->pi_mutex;
+				spin_lock(&lock2->wait_lock);
+
+				/* Save the top waiter of the wait_list */
+				if (rt_mutex_has_waiters(lock2))
+					top_waiter = rt_mutex_top_waiter(lock2);
+			} else
+				atomic_inc(&pi_state2->refcount);
+
+
+			this->pi_state = pi_state2;
+
+			/*
+			 * SECOND: requeue futex_q to the correct hashbucket
+			 */
+
+			/*
+			 * If key1 and key2 hash to the same bucket, no need to
+			 * requeue.
+			 */
+			if (likely(head1 != &hb2->chain)) {
+				plist_del(&this->list, &hb1->chain);
+				plist_add(&this->list, &hb2->chain);
+				this->lock_ptr = &hb2->lock;
+#ifdef CONFIG_DEBUG_PI_LIST
+				this->list.plist.lock = &hb2->lock;
+#endif
+			}
+			this->key = key2;
+			get_futex_key_refs(&key2);
+			drop_count++;
+
+
+			/*
+			 * THIRD: queue it to lock2
+			 */
+			spin_lock_irq(&this->task->pi_lock);
+			waiter = &this->waiter;
+			waiter->task = this->task;
+			waiter->lock = lock2;
+			plist_node_init(&waiter->list_entry, this->task->prio);
+			plist_node_init(&waiter->pi_list_entry, this->task->prio);
+			plist_add(&waiter->list_entry, &lock2->wait_list);
+			this->task->pi_blocked_on = waiter;
+			spin_unlock_irq(&this->task->pi_lock);
+
+			if (ret - nr_wake >= nr_requeue)
+				break;
+		}
+	}
+
+	/* If we've requeued some tasks and the top_waiter of the rt_mutex
+	   has changed, we must adjust the priority of the owner, if any */
+	if (drop_count) {
+		struct task_struct *owner = rt_mutex_owner(lock2);
+		if (owner &&
+		    (top_waiter != (waiter = rt_mutex_top_waiter(lock2)))) {
+			int chain_walk = 0;
+
+			spin_lock_irq(&owner->pi_lock);
+			if (top_waiter)
+				plist_del(&top_waiter->pi_list_entry, &owner->pi_waiters);
+			else
+				/*
+				 * There was no waiters before the requeue,
+				 * the flag must be updated
+				 */
+				mark_rt_mutex_waiters(lock2);
+
+			plist_add(&waiter->pi_list_entry, &owner->pi_waiters);
+			__rt_mutex_adjust_prio(owner);
+			if (owner->pi_blocked_on) {
+				chain_walk = 1;
+				get_task_struct(owner);
+			}
+
+			spin_unlock_irq(&owner->pi_lock);
+			spin_unlock(&lock2->wait_lock);
+
+			if (chain_walk)
+				rt_mutex_adjust_prio_chain(owner, 0, lock2, NULL,
+							   current);
+		} else {
+			/* No owner or the top_waiter does not change */
+			mark_rt_mutex_waiters(lock2);
+			spin_unlock(&lock2->wait_lock);
+		}
+	}
+
+out_unlock:
+	spin_unlock(&hb1->lock);
+	if (hb1 != hb2)
+		spin_unlock(&hb2->lock);
+
+	/* drop_futex_key_refs() must be called outside the spinlocks. */
+	while (--drop_count >= 0)
+		drop_futex_key_refs(&key1);
+
+out:
+	if (fshared)
+		up_read(fshared);
 	return ret;
 }
 
@@ -670,22 +985,24 @@
  * to this virtual address:
  */
 static int
-futex_wake_op(u32 __user *uaddr1, u32 __user *uaddr2,
+futex_wake_op(u32 __user *uaddr1, struct rw_semaphore *fshared,
+	      u32 __user *uaddr2,
 	      int nr_wake, int nr_wake2, int op)
 {
 	union futex_key key1, key2;
 	struct futex_hash_bucket *hb1, *hb2;
-	struct list_head *head;
+	struct plist_head *head;
 	struct futex_q *this, *next;
 	int ret, op_ret, attempt = 0;
 
 retryfull:
-	down_read(&current->mm->mmap_sem);
+	if (fshared)
+		down_read(fshared);
 
-	ret = get_futex_key(uaddr1, &key1);
+	ret = get_futex_key(uaddr1, fshared, &key1);
 	if (unlikely(ret != 0))
 		goto out;
-	ret = get_futex_key(uaddr2, &key2);
+	ret = get_futex_key(uaddr2, fshared, &key2);
 	if (unlikely(ret != 0))
 		goto out;
 
@@ -725,11 +1042,10 @@
 		 * still holding the mmap_sem.
 		 */
 		if (attempt++) {
-			if (futex_handle_fault((unsigned long)uaddr2,
-						attempt)) {
-				ret = -EFAULT;
+			ret = futex_handle_fault((unsigned long)uaddr2,
+						fshared, attempt);
+			if (ret)
 				goto out;
-			}
 			goto retry;
 		}
 
@@ -737,7 +1053,8 @@
 		 * If we would have faulted, release mmap_sem,
 		 * fault it in and start all over again.
 		 */
-		up_read(&current->mm->mmap_sem);
+		if (fshared)
+			up_read(fshared);
 
 		ret = get_user(dummy, uaddr2);
 		if (ret)
@@ -748,7 +1065,7 @@
 
 	head = &hb1->chain;
 
-	list_for_each_entry_safe(this, next, head, list) {
+	plist_for_each_entry_safe(this, next, head, list) {
 		if (match_futex (&this->key, &key1)) {
 			wake_futex(this);
 			if (++ret >= nr_wake)
@@ -760,7 +1077,7 @@
 		head = &hb2->chain;
 
 		op_ret = 0;
-		list_for_each_entry_safe(this, next, head, list) {
+		plist_for_each_entry_safe(this, next, head, list) {
 			if (match_futex (&this->key, &key2)) {
 				wake_futex(this);
 				if (++op_ret >= nr_wake2)
@@ -774,7 +1091,8 @@
 	if (hb1 != hb2)
 		spin_unlock(&hb2->lock);
 out:
-	up_read(&current->mm->mmap_sem);
+	if (fshared)
+		up_read(fshared);
 	return ret;
 }
 
@@ -782,22 +1100,24 @@
  * Requeue all waiters hashed on one physical page to another
  * physical page.
  */
-static int futex_requeue(u32 __user *uaddr1, u32 __user *uaddr2,
+static int futex_requeue(u32 __user *uaddr1, struct rw_semaphore *fshared,
+			 u32 __user *uaddr2,
 			 int nr_wake, int nr_requeue, u32 *cmpval)
 {
 	union futex_key key1, key2;
 	struct futex_hash_bucket *hb1, *hb2;
-	struct list_head *head1;
+	struct plist_head *head1;
 	struct futex_q *this, *next;
 	int ret, drop_count = 0;
 
  retry:
-	down_read(&current->mm->mmap_sem);
+	if (fshared)
+		down_read(fshared);
 
-	ret = get_futex_key(uaddr1, &key1);
+	ret = get_futex_key(uaddr1, fshared, &key1);
 	if (unlikely(ret != 0))
 		goto out;
-	ret = get_futex_key(uaddr2, &key2);
+	ret = get_futex_key(uaddr2, fshared, &key2);
 	if (unlikely(ret != 0))
 		goto out;
 
@@ -820,7 +1140,8 @@
 			 * If we would have faulted, release mmap_sem, fault
 			 * it in and start all over again.
 			 */
-			up_read(&current->mm->mmap_sem);
+			if (fshared)
+				up_read(fshared);
 
 			ret = get_user(curval, uaddr1);
 
@@ -836,7 +1157,7 @@
 	}
 
 	head1 = &hb1->chain;
-	list_for_each_entry_safe(this, next, head1, list) {
+	plist_for_each_entry_safe(this, next, head1, list) {
 		if (!match_futex (&this->key, &key1))
 			continue;
 		if (++ret <= nr_wake) {
@@ -847,9 +1168,13 @@
 			 * requeue.
 			 */
 			if (likely(head1 != &hb2->chain)) {
-				list_move_tail(&this->list, &hb2->chain);
+				plist_del(&this->list, &hb1->chain);
+				plist_add(&this->list, &hb2->chain);
 				this->lock_ptr = &hb2->lock;
-			}
+#ifdef CONFIG_DEBUG_PI_LIST
+				this->list.plist.lock = &hb2->lock;
+#endif
+ 			}
 			this->key = key2;
 			get_futex_key_refs(&key2);
 			drop_count++;
@@ -869,7 +1194,8 @@
 		drop_futex_key_refs(&key1);
 
 out:
-	up_read(&current->mm->mmap_sem);
+	if (fshared)
+		up_read(fshared);
 	return ret;
 }
 
@@ -894,7 +1220,23 @@
 
 static inline void __queue_me(struct futex_q *q, struct futex_hash_bucket *hb)
 {
-	list_add_tail(&q->list, &hb->chain);
+	int prio;
+
+	/*
+	 * The priority used to register this element is
+	 * - either the real thread-priority for the real-time threads
+	 * (i.e. threads with a priority lower than MAX_RT_PRIO)
+	 * - or MAX_RT_PRIO for non-RT threads.
+	 * Thus, all RT-threads are woken first in priority order, and
+	 * the others are woken last, in FIFO order.
+	 */
+	prio = min(current->normal_prio, MAX_RT_PRIO);
+
+	plist_node_init(&q->list, prio);
+#ifdef CONFIG_DEBUG_PI_LIST
+	q->list.plist.lock = &hb->lock;
+#endif
+	plist_add(&q->list, &hb->chain);
 	q->task = current;
 	spin_unlock(&hb->lock);
 }
@@ -949,8 +1291,8 @@
 			spin_unlock(lock_ptr);
 			goto retry;
 		}
-		WARN_ON(list_empty(&q->list));
-		list_del(&q->list);
+		WARN_ON(plist_node_empty(&q->list));
+		plist_del(&q->list, &q->list.plist);
 
 		BUG_ON(q->pi_state);
 
@@ -964,39 +1306,104 @@
 
 /*
  * PI futexes can not be requeued and must remove themself from the
- * hash bucket. The hash bucket lock is held on entry and dropped here.
+ * hash bucket. The hash bucket lock (i.e. lock_ptr) is held on entry
+ * and dropped here.
  */
-static void unqueue_me_pi(struct futex_q *q, struct futex_hash_bucket *hb)
+static void unqueue_me_pi(struct futex_q *q)
 {
-	WARN_ON(list_empty(&q->list));
-	list_del(&q->list);
+	WARN_ON(plist_node_empty(&q->list));
+	plist_del(&q->list, &q->list.plist);
 
 	BUG_ON(!q->pi_state);
 	free_pi_state(q->pi_state);
 	q->pi_state = NULL;
 
-	spin_unlock(&hb->lock);
+	spin_unlock(q->lock_ptr);
 
 	drop_futex_key_refs(&q->key);
 }
 
+/*
+ * Fixup the pi_state owner with current.
+ *
+ * The cur->mm semaphore must be  held, it is released at return of this
+ * function.
+ */
+static int fixup_pi_state_owner(u32 __user *uaddr, struct rw_semaphore *fshared,
+				struct futex_q *q,
+				struct futex_hash_bucket *hb,
+				struct task_struct *curr)
+{
+	u32 newtid = curr->pid | FUTEX_WAITERS;
+	struct futex_pi_state *pi_state = q->pi_state;
+	u32 uval, curval, newval;
+	int ret;
+
+	/* Owner died? */
+	if (pi_state->owner != NULL) {
+		spin_lock_irq(&pi_state->owner->pi_lock);
+		WARN_ON(list_empty(&pi_state->list));
+		list_del_init(&pi_state->list);
+		spin_unlock_irq(&pi_state->owner->pi_lock);
+	} else
+		newtid |= FUTEX_OWNER_DIED;
+
+	pi_state->owner = curr;
+
+	spin_lock_irq(&curr->pi_lock);
+	WARN_ON(!list_empty(&pi_state->list));
+	list_add(&pi_state->list, &curr->pi_state_list);
+	spin_unlock_irq(&curr->pi_lock);
+
+	/* Unqueue and drop the lock */
+	unqueue_me_pi(q);
+	if (fshared)
+		up_read(fshared);
+	/*
+	 * We own it, so we have to replace the pending owner
+	 * TID. This must be atomic as we have preserve the
+	 * owner died bit here.
+	 */
+	ret = get_user(uval, uaddr);
+	while (!ret) {
+		newval = (uval & FUTEX_OWNER_DIED) | newtid;
+		newval |= (uval & FUTEX_WAITER_REQUEUED);
+		curval = futex_atomic_cmpxchg_inatomic(uaddr,
+						       uval, newval);
+		if (curval == -EFAULT)
+ 			ret = -EFAULT;
+		if (curval == uval)
+			break;
+		uval = curval;
+	}
+	return ret;
+}
+
+/*
+ * In case we must use restart_block to restart a futex_wait,
+ * we encode in the 'arg3' shared capability
+ */
+#define ARG3_SHARED  1
+
 static long futex_wait_restart(struct restart_block *restart);
-static int futex_wait_abstime(u32 __user *uaddr, u32 val,
-			int timed, unsigned long abs_time)
+static int futex_wait(u32 __user *uaddr, struct rw_semaphore *fshared,
+		      u32 val, ktime_t *abs_time)
 {
 	struct task_struct *curr = current;
 	DECLARE_WAITQUEUE(wait, curr);
 	struct futex_hash_bucket *hb;
 	struct futex_q q;
-	unsigned long time_left = 0;
 	u32 uval;
 	int ret;
+	struct hrtimer_sleeper t, *to = NULL;
+	int rem = 0;
 
 	q.pi_state = NULL;
  retry:
-	down_read(&curr->mm->mmap_sem);
+	if (fshared)
+		down_read(fshared);
 
-	ret = get_futex_key(uaddr, &q.key);
+	ret = get_futex_key(uaddr, fshared, &q.key);
 	if (unlikely(ret != 0))
 		goto out_release_sem;
 
@@ -1019,8 +1426,8 @@
 	 * a wakeup when *uaddr != val on entry to the syscall.  This is
 	 * rare, but normal.
 	 *
-	 * We hold the mmap semaphore, so the mapping cannot have changed
-	 * since we looked it up in get_futex_key.
+	 * for shared futexes, we hold the mmap semaphore, so the mapping
+	 * cannot have changed since we looked it up in get_futex_key.
 	 */
 	ret = get_futex_value_locked(&uval, uaddr);
 
@@ -1031,7 +1438,8 @@
 		 * If we would have faulted, release mmap_sem, fault it in and
 		 * start all over again.
 		 */
-		up_read(&curr->mm->mmap_sem);
+		if (fshared)
+			up_read(fshared);
 
 		ret = get_user(uval, uaddr);
 
@@ -1043,6 +1451,14 @@
 	if (uval != val)
 		goto out_unlock_release_sem;
 
+	/*
+	 * This rt_mutex_waiter structure is prepared here and will
+	 * be used only if this task is requeued from a normal futex to
+	 * a PI-futex with futex_requeue_pi.
+	 */
+	debug_rt_mutex_init_waiter(&q.waiter);
+	q.waiter.task = NULL;
+
 	/* Only actually queue if *uaddr contained val.  */
 	__queue_me(&q, hb);
 
@@ -1050,7 +1466,8 @@
 	 * Now the futex is queued and we have checked the data, we
 	 * don't want to hold mmap_sem while we sleep.
 	 */
-	up_read(&curr->mm->mmap_sem);
+	if (fshared)
+		up_read(fshared);
 
 	/*
 	 * There might have been scheduling since the queue_me(), as we
@@ -1065,23 +1482,33 @@
 	__set_current_state(TASK_INTERRUPTIBLE);
 	add_wait_queue(&q.waiters, &wait);
 	/*
-	 * !list_empty() is safe here without any lock.
+	 * !plist_node_empty() is safe here without any lock.
 	 * q.lock_ptr != 0 is not safe, because of ordering against wakeup.
 	 */
-	time_left = 0;
-	if (likely(!list_empty(&q.list))) {
-		unsigned long rel_time;
+	if (likely(!plist_node_empty(&q.list))) {
+		if (!abs_time)
+			schedule();
+		else {
+			to = &t;
+			hrtimer_init(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+			hrtimer_init_sleeper(&t, current);
+			t.timer.expires = *abs_time;
 
-		if (timed) {
-			unsigned long now = jiffies;
-			if (time_after(now, abs_time))
-				rel_time = 0;
-			else
-				rel_time = abs_time - now;
-		} else
-			rel_time = MAX_SCHEDULE_TIMEOUT;
+			hrtimer_start(&t.timer, t.timer.expires, HRTIMER_MODE_ABS);
 
-		time_left = schedule_timeout(rel_time);
+			/*
+			 * the timer could have already expired, in which
+			 * case current would be flagged for rescheduling.
+			 * Don't bother calling schedule.
+			 */
+			if (likely(t.task))
+				schedule();
+
+			hrtimer_cancel(&t.timer);
+
+			/* Flag if a timeout occured */
+			rem = (t.task == NULL);
+		}
 	}
 	__set_current_state(TASK_RUNNING);
 
@@ -1090,17 +1517,80 @@
 	 * we are the only user of it.
 	 */
 
+	if (q.pi_state) {
+		/*
+		 * We were woken but have been requeued on a PI-futex.
+		 * We have to complete the lock acquisition by taking
+		 * the rtmutex.
+		 */
+
+		struct rt_mutex *lock = &q.pi_state->pi_mutex;
+
+		spin_lock(&lock->wait_lock);
+		if (unlikely(q.waiter.task)) {
+			remove_waiter(lock, &q.waiter);
+		}
+		spin_unlock(&lock->wait_lock);
+
+		if (rem)
+			ret = -ETIMEDOUT;
+		else
+			ret = rt_mutex_timed_lock(lock, to, 1);
+
+		if (fshared)
+			down_read(fshared);
+		spin_lock(q.lock_ptr);
+
+		/*
+		 * Got the lock. We might not be the anticipated owner if we
+		 * did a lock-steal - fix up the PI-state in that case.
+		 */
+		if (!ret && q.pi_state->owner != curr) {
+			/*
+			 * We MUST play with the futex we were requeued on,
+			 * NOT the current futex.
+			 * We can retrieve it from the key of the pi_state
+			 */
+			uaddr = q.pi_state->key.uaddr;
+
+			/* mmap_sem and hash_bucket lock are unlocked at
+			   return of this function */
+			ret = fixup_pi_state_owner(uaddr, fshared,
+						   &q, hb, curr);
+		} else {
+			/*
+			 * Catch the rare case, where the lock was released
+			 * when we were on the way back before we locked
+			 * the hash bucket.
+			 */
+			if (ret && q.pi_state->owner == curr) {
+				if (rt_mutex_trylock(&q.pi_state->pi_mutex))
+					ret = 0;
+			}
+			/* Unqueue and drop the lock */
+			unqueue_me_pi(&q);
+			if (fshared)
+				up_read(fshared);
+		}
+
+		debug_rt_mutex_free_waiter(&q.waiter);
+
+		return ret;
+	}
+
+	debug_rt_mutex_free_waiter(&q.waiter);
+
 	/* If we were woken (and unqueued), we succeeded, whatever. */
 	if (!unqueue_me(&q))
 		return 0;
-	if (time_left == 0)
+	if (rem)
 		return -ETIMEDOUT;
 
 	/*
 	 * We expect signal_pending(current), but another thread may
 	 * have handled it for us already.
 	 */
-	if (time_left == MAX_SCHEDULE_TIMEOUT)
+	if (!abs_time)
 		return -ERESTARTSYS;
 	else {
 		struct restart_block *restart;
@@ -1108,8 +1598,10 @@
 		restart->fn = futex_wait_restart;
 		restart->arg0 = (unsigned long)uaddr;
 		restart->arg1 = (unsigned long)val;
-		restart->arg2 = (unsigned long)timed;
-		restart->arg3 = abs_time;
+		restart->arg2 = (unsigned long)abs_time;
+		restart->arg3 = 0;
+		if (fshared)
+			restart->arg3 |= ARG3_SHARED;
 		return -ERESTART_RESTARTBLOCK;
 	}
 
@@ -1117,65 +1609,111 @@
 	queue_unlock(&q, hb);
 
  out_release_sem:
-	up_read(&curr->mm->mmap_sem);
+	if (fshared)
+		up_read(fshared);
 	return ret;
 }
 
-static int futex_wait(u32 __user *uaddr, u32 val, unsigned long rel_time)
-{
-	int timed = (rel_time != MAX_SCHEDULE_TIMEOUT);
-	return futex_wait_abstime(uaddr, val, timed, jiffies+rel_time);
-}
 
 static long futex_wait_restart(struct restart_block *restart)
 {
 	u32 __user *uaddr = (u32 __user *)restart->arg0;
 	u32 val = (u32)restart->arg1;
-	int timed = (int)restart->arg2;
-	unsigned long abs_time = restart->arg3;
+	ktime_t *abs_time = (ktime_t *)restart->arg2;
+	struct rw_semaphore *fshared = NULL;
 
 	restart->fn = do_no_restart_syscall;
-	return (long)futex_wait_abstime(uaddr, val, timed, abs_time);
+	if (restart->arg3 & ARG3_SHARED)
+		fshared = &current->mm->mmap_sem;
+	return (long)futex_wait(uaddr, fshared, val, abs_time);
 }
 
 
+static void set_pi_futex_owner(struct futex_hash_bucket *hb,
+			       union futex_key *key, struct task_struct *p)
+{
+	struct plist_head *head;
+	struct futex_q *this, *next;
+	struct futex_pi_state *pi_state = NULL;
+	struct rt_mutex *lock;
+
+	/* Search a waiter that should already exists */
+
+	head = &hb->chain;
+
+	plist_for_each_entry_safe(this, next, head, list) {
+		if (match_futex (&this->key, key)) {
+			pi_state = this->pi_state;
+			break;
+		}
+	}
+
+	BUG_ON(!pi_state);
+
+	/* set p as pi_state's owner */
+	lock = &pi_state->pi_mutex;
+
+	spin_lock(&lock->wait_lock);
+	spin_lock_irq(&p->pi_lock);
+
+	list_add(&pi_state->list, &p->pi_state_list);
+	pi_state->owner = p;
+
+
+	/* set p as pi_mutex's owner */
+	debug_rt_mutex_proxy_lock(lock, p);
+	WARN_ON(rt_mutex_owner(lock));
+	rt_mutex_set_owner(lock, p, 0);
+	rt_mutex_deadlock_account_lock(lock, p);
+
+	plist_add(&rt_mutex_top_waiter(lock)->pi_list_entry,
+		  &p->pi_waiters);
+	__rt_mutex_adjust_prio(p);
+
+	spin_unlock_irq(&p->pi_lock);
+	spin_unlock(&lock->wait_lock);
+}
+
 /*
  * Userspace tried a 0 -> TID atomic transition of the futex value
  * and failed. The kernel side here does the whole locking operation:
  * if there are waiters then it will block, it does PI, etc. (Due to
  * races the kernel might see a 0 value of the futex too.)
  */
-static int futex_lock_pi(u32 __user *uaddr, int detect, unsigned long sec,
-			 long nsec, int trylock)
+static int futex_lock_pi(u32 __user *uaddr, struct rw_semaphore *fshared,
+			 int detect, ktime_t *time, int trylock)
 {
 	struct hrtimer_sleeper timeout, *to = NULL;
 	struct task_struct *curr = current;
 	struct futex_hash_bucket *hb;
 	u32 uval, newval, curval;
 	struct futex_q q;
-	int ret, attempt = 0;
+	int ret, lock_held, attempt = 0;
 
 	if (refill_pi_state_cache())
 		return -ENOMEM;
 
-	if (sec != MAX_SCHEDULE_TIMEOUT) {
+	if (time) {
 		to = &timeout;
 		hrtimer_init(&to->timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
 		hrtimer_init_sleeper(to, current);
-		to->timer.expires = ktime_set(sec, nsec);
+		to->timer.expires = *time;
 	}
 
 	q.pi_state = NULL;
  retry:
-	down_read(&curr->mm->mmap_sem);
+	if (fshared)
+		down_read(fshared);
 
-	ret = get_futex_key(uaddr, &q.key);
+	ret = get_futex_key(uaddr, fshared, &q.key);
 	if (unlikely(ret != 0))
 		goto out_release_sem;
 
 	hb = queue_lock(&q, -1, NULL);
 
  retry_locked:
+	lock_held = 0;
+
 	/*
 	 * To avoid races, we attempt to take the lock here again
 	 * (by doing a 0 -> TID atomic cmpxchg), while holding all
@@ -1194,7 +1732,16 @@
 	if (unlikely((curval & FUTEX_TID_MASK) == current->pid)) {
 		if (!detect && 0)
 			force_sig(SIGKILL, current);
-		ret = -EDEADLK;
+		/*
+		 * Normally, this check is done in user space.
+		 * In case of requeue, the owner may attempt to lock this futex,
+		 * even if the ownership has already been given by the previous
+		 * waker.
+		 * In the usual case, this is a case of deadlock, but not in case
+		 * of REQUEUE_PI.
+		 */
+		if (!(curval & FUTEX_WAITER_REQUEUED))
+			ret = -EDEADLK;
 		goto out_unlock_release_sem;
 	}
 
@@ -1206,7 +1753,18 @@
 		goto out_unlock_release_sem;
 
 	uval = curval;
-	newval = uval | FUTEX_WAITERS;
+	/*
+	 * In case of a requeue, check if there already is an owner
+	 * If not, just take the futex.
+	 */
+	if ((curval & FUTEX_WAITER_REQUEUED) && !(curval & FUTEX_TID_MASK)) {
+		/* set current as futex owner */
+		newval = curval | current->pid;
+		lock_held = 1;
+	} else
+		/* Set the WAITERS flag, so the owner will know it has someone
+		   to wake at next unlock */
+		newval = curval | FUTEX_WAITERS;
 
 	pagefault_disable();
 	curval = futex_atomic_cmpxchg_inatomic(uaddr, uval, newval);
@@ -1217,11 +1775,16 @@
 	if (unlikely(curval != uval))
 		goto retry_locked;
 
+	if (lock_held) {
+		set_pi_futex_owner(hb, &q.key, curr);
+		goto out_unlock_release_sem;
+	}
+
 	/*
 	 * We dont have the lock. Look up the PI state (or create it if
 	 * we are the first waiter):
 	 */
-	ret = lookup_pi_state(uval, hb, &q);
+	ret = lookup_pi_state(uval, hb, &q.key, &q.pi_state);
 
 	if (unlikely(ret)) {
 		/*
@@ -1263,7 +1826,8 @@
 	 * Now the futex is queued and we have checked the data, we
 	 * don't want to hold mmap_sem while we sleep.
 	 */
-	up_read(&curr->mm->mmap_sem);
+	if (fshared)
+		up_read(fshared);
 
 	WARN_ON(!q.pi_state);
 	/*
@@ -1277,52 +1841,18 @@
 		ret = ret ? 0 : -EWOULDBLOCK;
 	}
 
-	down_read(&curr->mm->mmap_sem);
+	if (fshared)
+		down_read(fshared);
 	spin_lock(q.lock_ptr);
 
 	/*
 	 * Got the lock. We might not be the anticipated owner if we
 	 * did a lock-steal - fix up the PI-state in that case.
 	 */
-	if (!ret && q.pi_state->owner != curr) {
-		u32 newtid = current->pid | FUTEX_WAITERS;
-
-		/* Owner died? */
-		if (q.pi_state->owner != NULL) {
-			spin_lock_irq(&q.pi_state->owner->pi_lock);
-			WARN_ON(list_empty(&q.pi_state->list));
-			list_del_init(&q.pi_state->list);
-			spin_unlock_irq(&q.pi_state->owner->pi_lock);
-		} else
-			newtid |= FUTEX_OWNER_DIED;
-
-		q.pi_state->owner = current;
-
-		spin_lock_irq(&current->pi_lock);
-		WARN_ON(!list_empty(&q.pi_state->list));
-		list_add(&q.pi_state->list, &current->pi_state_list);
-		spin_unlock_irq(&current->pi_lock);
-
-		/* Unqueue and drop the lock */
-		unqueue_me_pi(&q, hb);
-		up_read(&curr->mm->mmap_sem);
-		/*
-		 * We own it, so we have to replace the pending owner
-		 * TID. This must be atomic as we have preserve the
-		 * owner died bit here.
-		 */
-		ret = get_user(uval, uaddr);
-		while (!ret) {
-			newval = (uval & FUTEX_OWNER_DIED) | newtid;
-			curval = futex_atomic_cmpxchg_inatomic(uaddr,
-							       uval, newval);
-			if (curval == -EFAULT)
-				ret = -EFAULT;
-			if (curval == uval)
-				break;
-			uval = curval;
-		}
-	} else {
+	if (!ret && q.pi_state->owner != curr)
+		/* mmap_sem is unlocked at return of this function */
+		ret = fixup_pi_state_owner(uaddr, fshared, &q, hb, curr);
+	else {
 		/*
 		 * Catch the rare case, where the lock was released
 		 * when we were on the way back before we locked
@@ -1333,8 +1863,9 @@
 				ret = 0;
 		}
 		/* Unqueue and drop the lock */
-		unqueue_me_pi(&q, hb);
-		up_read(&curr->mm->mmap_sem);
+		unqueue_me_pi(&q);
+		if (fshared)
+			up_read(fshared);
 	}
 
 	if (!detect && ret == -EDEADLK && 0)
@@ -1346,7 +1877,8 @@
 	queue_unlock(&q, hb);
 
  out_release_sem:
-	up_read(&curr->mm->mmap_sem);
+	if (fshared)
+		up_read(fshared);
 	return ret;
 
  uaddr_faulted:
@@ -1357,15 +1889,16 @@
 	 * still holding the mmap_sem.
 	 */
 	if (attempt++) {
-		if (futex_handle_fault((unsigned long)uaddr, attempt)) {
-			ret = -EFAULT;
+		ret = futex_handle_fault((unsigned long)uaddr, fshared,
+					 attempt);
+		if (ret)
 			goto out_unlock_release_sem;
-		}
 		goto retry_locked;
 	}
 
 	queue_unlock(&q, hb);
-	up_read(&curr->mm->mmap_sem);
+	if (fshared)
+		up_read(fshared);
 
 	ret = get_user(uval, uaddr);
 	if (!ret && (uval != -EFAULT))
@@ -1379,12 +1912,12 @@
  * This is the in-kernel slowpath: we look up the PI state (if any),
  * and do the rt-mutex unlock.
  */
-static int futex_unlock_pi(u32 __user *uaddr)
+static int futex_unlock_pi(u32 __user *uaddr, struct rw_semaphore *fshared)
 {
 	struct futex_hash_bucket *hb;
 	struct futex_q *this, *next;
 	u32 uval;
-	struct list_head *head;
+	struct plist_head *head;
 	union futex_key key;
 	int ret, attempt = 0;
 
@@ -1399,9 +1932,10 @@
 	/*
 	 * First take all the futex related locks:
 	 */
-	down_read(&current->mm->mmap_sem);
+	if (fshared)
+		down_read(fshared);
 
-	ret = get_futex_key(uaddr, &key);
+	ret = get_futex_key(uaddr, fshared, &key);
 	if (unlikely(ret != 0))
 		goto out;
 
@@ -1435,7 +1969,7 @@
 	 */
 	head = &hb->chain;
 
-	list_for_each_entry_safe(this, next, head, list) {
+	plist_for_each_entry_safe(this, next, head, list) {
 		if (!match_futex (&this->key, &key))
 			continue;
 		ret = wake_futex_pi(uaddr, uval, this);
@@ -1460,7 +1994,8 @@
 out_unlock:
 	spin_unlock(&hb->lock);
 out:
-	up_read(&current->mm->mmap_sem);
+	if (fshared)
+		up_read(fshared);
 
 	return ret;
 
@@ -1472,15 +2007,16 @@
 	 * still holding the mmap_sem.
 	 */
 	if (attempt++) {
-		if (futex_handle_fault((unsigned long)uaddr, attempt)) {
-			ret = -EFAULT;
+		ret = futex_handle_fault((unsigned long)uaddr, fshared,
+					 attempt);
+		if (ret)
 			goto out_unlock;
-		}
 		goto retry_locked;
 	}
 
 	spin_unlock(&hb->lock);
-	up_read(&current->mm->mmap_sem);
+	if (fshared)
+		up_read(fshared);
 
 	ret = get_user(uval, uaddr);
 	if (!ret && (uval != -EFAULT))
@@ -1509,10 +2045,10 @@
 	poll_wait(filp, &q->waiters, wait);
 
 	/*
-	 * list_empty() is safe here without any lock.
+	 * plist_node_empty() is safe here without any lock.
 	 * q->lock_ptr != 0 is not safe, because of ordering against wakeup.
 	 */
-	if (list_empty(&q->list))
+	if (plist_node_empty(&q->list))
 		ret = POLLIN | POLLRDNORM;
 
 	return ret;
@@ -1532,6 +2068,7 @@
 	struct futex_q *q;
 	struct file *filp;
 	int ret, err;
+	struct rw_semaphore *fshared;
 	static unsigned long printk_interval;
 
 	if (printk_timed_ratelimit(&printk_interval, 60 * 60 * 1000)) {
@@ -1573,11 +2110,12 @@
 	}
 	q->pi_state = NULL;
 
-	down_read(&current->mm->mmap_sem);
-	err = get_futex_key(uaddr, &q->key);
+	fshared = &current->mm->mmap_sem;
+	down_read(fshared);
+	err = get_futex_key(uaddr, fshared, &q->key);
 
 	if (unlikely(err != 0)) {
-		up_read(&current->mm->mmap_sem);
+		up_read(fshared);
 		kfree(q);
 		goto error;
 	}
@@ -1589,7 +2127,7 @@
 	filp->private_data = q;
 
 	queue_me(q, ret, filp);
-	up_read(&current->mm->mmap_sem);
+	up_read(fshared);
 
 	/* Now we map fd to filp, so userspace can access it */
 	fd_install(ret, filp);
@@ -1702,6 +2240,8 @@
 		 * userspace.
 		 */
 		mval = (uval & FUTEX_WAITERS) | FUTEX_OWNER_DIED;
+		/* Also keep the FUTEX_WAITER_REQUEUED flag if set */
+		mval |= (uval & FUTEX_WAITER_REQUEUED);
 		nval = futex_atomic_cmpxchg_inatomic(uaddr, uval, mval);
 
 		if (nval == -EFAULT)
@@ -1716,7 +2256,7 @@
 		 */
 		if (!pi) {
 			if (uval & FUTEX_WAITERS)
-				futex_wake(uaddr, 1);
+				futex_wake(uaddr, &curr->mm->mmap_sem, 1);
 		}
 	}
 	return 0;
@@ -1772,7 +2312,8 @@
 		return;
 
 	if (pending)
-		handle_futex_death((void __user *)pending + futex_offset, curr, pip);
+		handle_futex_death((void __user *)pending + futex_offset,
+				   curr, pip);
 
 	while (entry != &head->list) {
 		/*
@@ -1798,39 +2339,47 @@
 	}
 }
 
-long do_futex(u32 __user *uaddr, int op, u32 val, unsigned long timeout,
+long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
 		u32 __user *uaddr2, u32 val2, u32 val3)
 {
 	int ret;
+	int cmd = op & FUTEX_CMD_MASK;
+	struct rw_semaphore *fshared = NULL;
 
-	switch (op) {
+	if (!(op & FUTEX_PRIVATE_FLAG))
+		fshared = &current->mm->mmap_sem;
+
+	switch (cmd) {
 	case FUTEX_WAIT:
-		ret = futex_wait(uaddr, val, timeout);
+		ret = futex_wait(uaddr, fshared, val, timeout);
 		break;
 	case FUTEX_WAKE:
-		ret = futex_wake(uaddr, val);
+		ret = futex_wake(uaddr, fshared, val);
 		break;
 	case FUTEX_FD:
 		/* non-zero val means F_SETOWN(getpid()) & F_SETSIG(val) */
 		ret = futex_fd(uaddr, val);
 		break;
 	case FUTEX_REQUEUE:
-		ret = futex_requeue(uaddr, uaddr2, val, val2, NULL);
+		ret = futex_requeue(uaddr, fshared, uaddr2, val, val2, NULL);
 		break;
 	case FUTEX_CMP_REQUEUE:
-		ret = futex_requeue(uaddr, uaddr2, val, val2, &val3);
+		ret = futex_requeue(uaddr, fshared, uaddr2, val, val2, &val3);
 		break;
 	case FUTEX_WAKE_OP:
-		ret = futex_wake_op(uaddr, uaddr2, val, val2, val3);
+		ret = futex_wake_op(uaddr, fshared, uaddr2, val, val2, val3);
 		break;
 	case FUTEX_LOCK_PI:
-		ret = futex_lock_pi(uaddr, val, timeout, val2, 0);
+		ret = futex_lock_pi(uaddr, fshared, val, timeout, 0);
 		break;
 	case FUTEX_UNLOCK_PI:
-		ret = futex_unlock_pi(uaddr);
+		ret = futex_unlock_pi(uaddr, fshared);
 		break;
 	case FUTEX_TRYLOCK_PI:
-		ret = futex_lock_pi(uaddr, 0, timeout, val2, 1);
+		ret = futex_lock_pi(uaddr, fshared, 0, timeout, 1);
+		break;
+	case FUTEX_CMP_REQUEUE_PI:
+		ret = futex_requeue_pi(uaddr, fshared, uaddr2, val, val2, &val3);
 		break;
 	default:
 		ret = -ENOSYS;
@@ -1843,29 +2392,30 @@
 			  struct timespec __user *utime, u32 __user *uaddr2,
 			  u32 val3)
 {
-	struct timespec t;
-	unsigned long timeout = MAX_SCHEDULE_TIMEOUT;
+	struct timespec ts;
+	ktime_t t, *tp = NULL;
 	u32 val2 = 0;
+	int cmd = op & FUTEX_CMD_MASK;
 
-	if (utime && (op == FUTEX_WAIT || op == FUTEX_LOCK_PI)) {
-		if (copy_from_user(&t, utime, sizeof(t)) != 0)
+	if (utime && (cmd == FUTEX_WAIT || cmd == FUTEX_LOCK_PI)) {
+		if (copy_from_user(&ts, utime, sizeof(ts)) != 0)
 			return -EFAULT;
-		if (!timespec_valid(&t))
+		if (!timespec_valid(&ts))
 			return -EINVAL;
-		if (op == FUTEX_WAIT)
-			timeout = timespec_to_jiffies(&t) + 1;
-		else {
-			timeout = t.tv_sec;
-			val2 = t.tv_nsec;
-		}
+
+		t = timespec_to_ktime(ts);
+		if (cmd == FUTEX_WAIT)
+			t = ktime_add(ktime_get(), t);
+		tp = &t;
 	}
 	/*
-	 * requeue parameter in 'utime' if op == FUTEX_REQUEUE.
+	 * requeue parameter in 'utime' if cmd == FUTEX_REQUEUE.
 	 */
-	if (op == FUTEX_REQUEUE || op == FUTEX_CMP_REQUEUE)
+	if (cmd == FUTEX_REQUEUE || cmd == FUTEX_CMP_REQUEUE
+	    || cmd == FUTEX_CMP_REQUEUE_PI)
 		val2 = (u32) (unsigned long) utime;
 
-	return do_futex(uaddr, op, val, timeout, uaddr2, val2, val3);
+	return do_futex(uaddr, op, val, tp, uaddr2, val2, val3);
 }
 
 static int futexfs_get_sb(struct file_system_type *fs_type,
@@ -1895,7 +2445,7 @@
 	}
 
 	for (i = 0; i < ARRAY_SIZE(futex_queues); i++) {
-		INIT_LIST_HEAD(&futex_queues[i].chain);
+		plist_head_init(&futex_queues[i].chain, &futex_queues[i].lock);
 		spin_lock_init(&futex_queues[i].lock);
 	}
 	return 0;
diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index 50f24ee..338a9b4 100644
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -141,24 +141,24 @@
 		struct compat_timespec __user *utime, u32 __user *uaddr2,
 		u32 val3)
 {
-	struct timespec t;
-	unsigned long timeout = MAX_SCHEDULE_TIMEOUT;
+	struct timespec ts;
+	ktime_t t, *tp = NULL;
 	int val2 = 0;
 
 	if (utime && (op == FUTEX_WAIT || op == FUTEX_LOCK_PI)) {
-		if (get_compat_timespec(&t, utime))
+		if (get_compat_timespec(&ts, utime))
 			return -EFAULT;
-		if (!timespec_valid(&t))
+		if (!timespec_valid(&ts))
 			return -EINVAL;
+
+		t = timespec_to_ktime(ts);
 		if (op == FUTEX_WAIT)
-			timeout = timespec_to_jiffies(&t) + 1;
-		else {
-			timeout = t.tv_sec;
-			val2 = t.tv_nsec;
-		}
+			t = ktime_add(ktime_get(), t);
+		tp = &t;
 	}
-	if (op == FUTEX_REQUEUE || op == FUTEX_CMP_REQUEUE)
+	if (op == FUTEX_REQUEUE || op == FUTEX_CMP_REQUEUE
+	    || op == FUTEX_CMP_REQUEUE_PI)
 		val2 = (int) (unsigned long) utime;
 
-	return do_futex(uaddr, op, val, timeout, uaddr2, val2, val3);
+	return do_futex(uaddr, op, val, tp, uaddr2, val2, val3);
 }
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index c9f4f04..23c03f4 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1411,11 +1411,13 @@
 	switch (action) {
 
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		init_hrtimers_cpu(cpu);
 		break;
 
 #ifdef CONFIG_HOTPLUG_CPU
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		clockevents_notify(CLOCK_EVT_NOTIFY_CPU_DEAD, &cpu);
 		migrate_hrtimers(cpu);
 		break;
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 32e1ab1..e391cbb 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -22,7 +22,6 @@
  * handle_bad_irq - handle spurious and unhandled irqs
  * @irq:       the interrupt number
  * @desc:      description of the interrupt
- * @regs:      pointer to a register structure
  *
  * Handles spurious and unhandled IRQ's. It also prints a debugmessage.
  */
diff --git a/kernel/kmod.c b/kernel/kmod.c
index 49cc4b9..4d32eb0 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -135,7 +135,6 @@
 
 	/* Unblock all signals and set the session keyring. */
 	new_session = key_get(sub_info->ring);
-	flush_signals(current);
 	spin_lock_irq(&current->sighand->siglock);
 	old_session = __install_session_keyring(current, new_session);
 	flush_signal_handlers(current, 1);
@@ -186,14 +185,9 @@
 {
 	struct subprocess_info *sub_info = data;
 	pid_t pid;
-	struct k_sigaction sa;
 
 	/* Install a handler: if SIGCLD isn't handled sys_wait4 won't
 	 * populate the status, but will return -ECHILD. */
-	sa.sa.sa_handler = SIG_IGN;
-	sa.sa.sa_flags = 0;
-	siginitset(&sa.sa.sa_mask, sigmask(SIGCHLD));
-	do_sigaction(SIGCHLD, &sa, NULL);
 	allow_signal(SIGCHLD);
 
 	pid = kernel_thread(____call_usermodehelper, sub_info, SIGCHLD);
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 87c50cc..df8a8e8 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -1,7 +1,7 @@
 /* Kernel thread helper functions.
  *   Copyright (C) 2004 IBM Corporation, Rusty Russell.
  *
- * Creation is done via keventd, so that we get a clean environment
+ * Creation is done via kthreadd, so that we get a clean environment
  * even if we're invoked from userspace (think modprobe, hotplug cpu,
  * etc.).
  */
@@ -15,24 +15,22 @@
 #include <linux/mutex.h>
 #include <asm/semaphore.h>
 
-/*
- * We dont want to execute off keventd since it might
- * hold a semaphore our callers hold too:
- */
-static struct workqueue_struct *helper_wq;
+static DEFINE_SPINLOCK(kthread_create_lock);
+static LIST_HEAD(kthread_create_list);
+struct task_struct *kthreadd_task;
 
 struct kthread_create_info
 {
-	/* Information passed to kthread() from keventd. */
+	/* Information passed to kthread() from kthreadd. */
 	int (*threadfn)(void *data);
 	void *data;
 	struct completion started;
 
-	/* Result passed back to kthread_create() from keventd. */
+	/* Result passed back to kthread_create() from kthreadd. */
 	struct task_struct *result;
 	struct completion done;
 
-	struct work_struct work;
+	struct list_head list;
 };
 
 struct kthread_stop_info
@@ -60,42 +58,17 @@
 }
 EXPORT_SYMBOL(kthread_should_stop);
 
-static void kthread_exit_files(void)
-{
-	struct fs_struct *fs;
-	struct task_struct *tsk = current;
-
-	exit_fs(tsk);		/* current->fs->count--; */
-	fs = init_task.fs;
-	tsk->fs = fs;
-	atomic_inc(&fs->count);
- 	exit_files(tsk);
-	current->files = init_task.files;
-	atomic_inc(&tsk->files->count);
-}
-
 static int kthread(void *_create)
 {
 	struct kthread_create_info *create = _create;
 	int (*threadfn)(void *data);
 	void *data;
-	sigset_t blocked;
 	int ret = -EINTR;
 
-	kthread_exit_files();
-
-	/* Copy data: it's on keventd's stack */
+	/* Copy data: it's on kthread's stack */
 	threadfn = create->threadfn;
 	data = create->data;
 
-	/* Block and flush all signals (in case we're not from keventd). */
-	sigfillset(&blocked);
-	sigprocmask(SIG_BLOCK, &blocked, NULL);
-	flush_signals(current);
-
-	/* By default we can run anywhere, unlike keventd. */
-	set_cpus_allowed(current, CPU_MASK_ALL);
-
 	/* OK, tell user we're spawned, wait for stop or wakeup */
 	__set_current_state(TASK_INTERRUPTIBLE);
 	complete(&create->started);
@@ -112,11 +85,8 @@
 	return 0;
 }
 
-/* We are keventd: create a thread. */
-static void keventd_create_kthread(struct work_struct *work)
+static void create_kthread(struct kthread_create_info *create)
 {
-	struct kthread_create_info *create =
-		container_of(work, struct kthread_create_info, work);
 	int pid;
 
 	/* We want our own signal handler (we take no signals by default). */
@@ -162,17 +132,14 @@
 	create.data = data;
 	init_completion(&create.started);
 	init_completion(&create.done);
-	INIT_WORK(&create.work, keventd_create_kthread);
 
-	/*
-	 * The workqueue needs to start up first:
-	 */
-	if (!helper_wq)
-		create.work.func(&create.work);
-	else {
-		queue_work(helper_wq, &create.work);
-		wait_for_completion(&create.done);
-	}
+	spin_lock(&kthread_create_lock);
+	list_add_tail(&create.list, &kthread_create_list);
+	wake_up_process(kthreadd_task);
+	spin_unlock(&kthread_create_lock);
+
+	wait_for_completion(&create.done);
+
 	if (!IS_ERR(create.result)) {
 		va_list args;
 		va_start(args, namefmt);
@@ -180,7 +147,6 @@
 			  namefmt, args);
 		va_end(args);
 	}
-
 	return create.result;
 }
 EXPORT_SYMBOL(kthread_create);
@@ -245,12 +211,47 @@
 }
 EXPORT_SYMBOL(kthread_stop);
 
-static __init int helper_init(void)
+
+static __init void kthreadd_setup(void)
 {
-	helper_wq = create_singlethread_workqueue("kthread");
-	BUG_ON(!helper_wq);
+	struct task_struct *tsk = current;
+
+	set_task_comm(tsk, "kthreadd");
+
+	ignore_signals(tsk);
+
+	set_user_nice(tsk, -5);
+	set_cpus_allowed(tsk, CPU_MASK_ALL);
+}
+
+int kthreadd(void *unused)
+{
+	/* Setup a clean context for our children to inherit. */
+	kthreadd_setup();
+
+	current->flags |= PF_NOFREEZE;
+
+	for (;;) {
+		set_current_state(TASK_INTERRUPTIBLE);
+		if (list_empty(&kthread_create_list))
+			schedule();
+		__set_current_state(TASK_RUNNING);
+
+		spin_lock(&kthread_create_lock);
+		while (!list_empty(&kthread_create_list)) {
+			struct kthread_create_info *create;
+
+			create = list_entry(kthread_create_list.next,
+					    struct kthread_create_info, list);
+			list_del_init(&create->list);
+			spin_unlock(&kthread_create_lock);
+
+			create_kthread(create);
+
+			spin_lock(&kthread_create_lock);
+		}
+		spin_unlock(&kthread_create_lock);
+	}
 
 	return 0;
 }
-
-core_initcall(helper_init);
diff --git a/kernel/mutex.c b/kernel/mutex.c
index e7cbbb8..303eab1 100644
--- a/kernel/mutex.c
+++ b/kernel/mutex.c
@@ -133,7 +133,7 @@
 
 	debug_mutex_lock_common(lock, &waiter);
 	mutex_acquire(&lock->dep_map, subclass, 0, _RET_IP_);
-	debug_mutex_add_waiter(lock, &waiter, task->thread_info);
+	debug_mutex_add_waiter(lock, &waiter, task_thread_info(task));
 
 	/* add waiting tasks to the end of the waitqueue (FIFO): */
 	list_add_tail(&waiter.list, &lock->wait_list);
@@ -159,7 +159,7 @@
 		 */
 		if (unlikely(state == TASK_INTERRUPTIBLE &&
 						signal_pending(task))) {
-			mutex_remove_waiter(lock, &waiter, task->thread_info);
+			mutex_remove_waiter(lock, &waiter, task_thread_info(task));
 			mutex_release(&lock->dep_map, 1, _RET_IP_);
 			spin_unlock_mutex(&lock->wait_lock, flags);
 
@@ -175,8 +175,8 @@
 	}
 
 	/* got the lock - rejoice! */
-	mutex_remove_waiter(lock, &waiter, task->thread_info);
-	debug_mutex_set_owner(lock, task->thread_info);
+	mutex_remove_waiter(lock, &waiter, task_thread_info(task));
+	debug_mutex_set_owner(lock, task_thread_info(task));
 
 	/* set it to 0 if there are no waiters left: */
 	if (likely(list_empty(&lock->wait_list)))
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index 0633137..b5f0543 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -30,30 +30,69 @@
 dev_t swsusp_resume_device;
 sector_t swsusp_resume_block;
 
+enum {
+	HIBERNATION_INVALID,
+	HIBERNATION_PLATFORM,
+	HIBERNATION_TEST,
+	HIBERNATION_TESTPROC,
+	HIBERNATION_SHUTDOWN,
+	HIBERNATION_REBOOT,
+	/* keep last */
+	__HIBERNATION_AFTER_LAST
+};
+#define HIBERNATION_MAX (__HIBERNATION_AFTER_LAST-1)
+#define HIBERNATION_FIRST (HIBERNATION_INVALID + 1)
+
+static int hibernation_mode = HIBERNATION_SHUTDOWN;
+
+struct hibernation_ops *hibernation_ops;
+
+/**
+ * hibernation_set_ops - set the global hibernate operations
+ * @ops: the hibernation operations to use in subsequent hibernation transitions
+ */
+
+void hibernation_set_ops(struct hibernation_ops *ops)
+{
+	if (ops && !(ops->prepare && ops->enter && ops->finish)) {
+		WARN_ON(1);
+		return;
+	}
+	mutex_lock(&pm_mutex);
+	hibernation_ops = ops;
+	if (ops)
+		hibernation_mode = HIBERNATION_PLATFORM;
+	else if (hibernation_mode == HIBERNATION_PLATFORM)
+		hibernation_mode = HIBERNATION_SHUTDOWN;
+
+	mutex_unlock(&pm_mutex);
+}
+
+
 /**
  *	platform_prepare - prepare the machine for hibernation using the
  *	platform driver if so configured and return an error code if it fails
  */
 
-static inline int platform_prepare(void)
+static int platform_prepare(void)
 {
-	int error = 0;
-
-	switch (pm_disk_mode) {
-	case PM_DISK_TEST:
-	case PM_DISK_TESTPROC:
-	case PM_DISK_SHUTDOWN:
-	case PM_DISK_REBOOT:
-		break;
-	default:
-		if (pm_ops && pm_ops->prepare)
-			error = pm_ops->prepare(PM_SUSPEND_DISK);
-	}
-	return error;
+	return (hibernation_mode == HIBERNATION_PLATFORM && hibernation_ops) ?
+		hibernation_ops->prepare() : 0;
 }
 
 /**
- *	power_down - Shut machine down for hibernate.
+ *	platform_finish - switch the machine to the normal mode of operation
+ *	using the platform driver (must be called after platform_prepare())
+ */
+
+static void platform_finish(void)
+{
+	if (hibernation_mode == HIBERNATION_PLATFORM && hibernation_ops)
+		hibernation_ops->finish();
+}
+
+/**
+ *	power_down - Shut the machine down for hibernation.
  *
  *	Use the platform driver, if configured so; otherwise try
  *	to power off or reboot.
@@ -61,20 +100,20 @@
 
 static void power_down(void)
 {
-	switch (pm_disk_mode) {
-	case PM_DISK_TEST:
-	case PM_DISK_TESTPROC:
+	switch (hibernation_mode) {
+	case HIBERNATION_TEST:
+	case HIBERNATION_TESTPROC:
 		break;
-	case PM_DISK_SHUTDOWN:
+	case HIBERNATION_SHUTDOWN:
 		kernel_power_off();
 		break;
-	case PM_DISK_REBOOT:
+	case HIBERNATION_REBOOT:
 		kernel_restart(NULL);
 		break;
-	default:
-		if (pm_ops && pm_ops->enter) {
+	case HIBERNATION_PLATFORM:
+		if (hibernation_ops) {
 			kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
-			pm_ops->enter(PM_SUSPEND_DISK);
+			hibernation_ops->enter();
 			break;
 		}
 	}
@@ -87,20 +126,6 @@
 	while(1);
 }
 
-static inline void platform_finish(void)
-{
-	switch (pm_disk_mode) {
-	case PM_DISK_TEST:
-	case PM_DISK_TESTPROC:
-	case PM_DISK_SHUTDOWN:
-	case PM_DISK_REBOOT:
-		break;
-	default:
-		if (pm_ops && pm_ops->finish)
-			pm_ops->finish(PM_SUSPEND_DISK);
-	}
-}
-
 static void unprepare_processes(void)
 {
 	thaw_processes();
@@ -120,13 +145,10 @@
 }
 
 /**
- *	pm_suspend_disk - The granpappy of hibernation power management.
- *
- *	If not, then call swsusp to do its thing, then figure out how
- *	to power down the system.
+ *	hibernate - The granpappy of the built-in hibernation management
  */
 
-int pm_suspend_disk(void)
+int hibernate(void)
 {
 	int error;
 
@@ -143,7 +165,8 @@
 	if (error)
 		goto Finish;
 
-	if (pm_disk_mode == PM_DISK_TESTPROC) {
+	mutex_lock(&pm_mutex);
+	if (hibernation_mode == HIBERNATION_TESTPROC) {
 		printk("swsusp debug: Waiting for 5 seconds.\n");
 		mdelay(5000);
 		goto Thaw;
@@ -168,7 +191,7 @@
 	if (error)
 		goto Enable_cpus;
 
-	if (pm_disk_mode == PM_DISK_TEST) {
+	if (hibernation_mode == HIBERNATION_TEST) {
 		printk("swsusp debug: Waiting for 5 seconds.\n");
 		mdelay(5000);
 		goto Enable_cpus;
@@ -205,6 +228,7 @@
 	device_resume();
 	resume_console();
  Thaw:
+	mutex_unlock(&pm_mutex);
 	unprepare_processes();
  Finish:
 	free_basic_memory_bitmaps();
@@ -220,7 +244,7 @@
  *	Called as a late_initcall (so all devices are discovered and
  *	initialized), we call swsusp to see if we have a saved image or not.
  *	If so, we quiesce devices, the restore the saved image. We will
- *	return above (in pm_suspend_disk() ) if everything goes well.
+ *	return above (in hibernate() ) if everything goes well.
  *	Otherwise, we fail gracefully and return to the normally
  *	scheduled program.
  *
@@ -315,25 +339,26 @@
 late_initcall(software_resume);
 
 
-static const char * const pm_disk_modes[] = {
-	[PM_DISK_PLATFORM]	= "platform",
-	[PM_DISK_SHUTDOWN]	= "shutdown",
-	[PM_DISK_REBOOT]	= "reboot",
-	[PM_DISK_TEST]		= "test",
-	[PM_DISK_TESTPROC]	= "testproc",
+static const char * const hibernation_modes[] = {
+	[HIBERNATION_PLATFORM]	= "platform",
+	[HIBERNATION_SHUTDOWN]	= "shutdown",
+	[HIBERNATION_REBOOT]	= "reboot",
+	[HIBERNATION_TEST]	= "test",
+	[HIBERNATION_TESTPROC]	= "testproc",
 };
 
 /**
- *	disk - Control suspend-to-disk mode
+ *	disk - Control hibernation mode
  *
  *	Suspend-to-disk can be handled in several ways. We have a few options
  *	for putting the system to sleep - using the platform driver (e.g. ACPI
- *	or other pm_ops), powering off the system or rebooting the system
- *	(for testing) as well as the two test modes.
+ *	or other hibernation_ops), powering off the system or rebooting the
+ *	system (for testing) as well as the two test modes.
  *
  *	The system can support 'platform', and that is known a priori (and
- *	encoded in pm_ops). However, the user may choose 'shutdown' or 'reboot'
- *	as alternatives, as well as the test modes 'test' and 'testproc'.
+ *	encoded by the presence of hibernation_ops). However, the user may
+ *	choose 'shutdown' or 'reboot' as alternatives, as well as one fo the
+ *	test modes, 'test' or 'testproc'.
  *
  *	show() will display what the mode is currently set to.
  *	store() will accept one of
@@ -345,7 +370,7 @@
  *	'testproc'
  *
  *	It will only change to 'platform' if the system
- *	supports it (as determined from pm_ops->pm_disk_mode).
+ *	supports it (as determined by having hibernation_ops).
  */
 
 static ssize_t disk_show(struct kset *kset, char *buf)
@@ -353,28 +378,25 @@
 	int i;
 	char *start = buf;
 
-	for (i = PM_DISK_PLATFORM; i < PM_DISK_MAX; i++) {
-		if (!pm_disk_modes[i])
+	for (i = HIBERNATION_FIRST; i <= HIBERNATION_MAX; i++) {
+		if (!hibernation_modes[i])
 			continue;
 		switch (i) {
-		case PM_DISK_SHUTDOWN:
-		case PM_DISK_REBOOT:
-		case PM_DISK_TEST:
-		case PM_DISK_TESTPROC:
+		case HIBERNATION_SHUTDOWN:
+		case HIBERNATION_REBOOT:
+		case HIBERNATION_TEST:
+		case HIBERNATION_TESTPROC:
 			break;
-		default:
-			if (pm_ops && pm_ops->enter &&
-			    (i == pm_ops->pm_disk_mode))
+		case HIBERNATION_PLATFORM:
+			if (hibernation_ops)
 				break;
 			/* not a valid mode, continue with loop */
 			continue;
 		}
-		if (i == pm_disk_mode)
-			buf += sprintf(buf, "[%s]", pm_disk_modes[i]);
+		if (i == hibernation_mode)
+			buf += sprintf(buf, "[%s] ", hibernation_modes[i]);
 		else
-			buf += sprintf(buf, "%s", pm_disk_modes[i]);
-		if (i+1 != PM_DISK_MAX)
-			buf += sprintf(buf, " ");
+			buf += sprintf(buf, "%s ", hibernation_modes[i]);
 	}
 	buf += sprintf(buf, "\n");
 	return buf-start;
@@ -387,39 +409,38 @@
 	int i;
 	int len;
 	char *p;
-	suspend_disk_method_t mode = 0;
+	int mode = HIBERNATION_INVALID;
 
 	p = memchr(buf, '\n', n);
 	len = p ? p - buf : n;
 
 	mutex_lock(&pm_mutex);
-	for (i = PM_DISK_PLATFORM; i < PM_DISK_MAX; i++) {
-		if (!strncmp(buf, pm_disk_modes[i], len)) {
+	for (i = HIBERNATION_FIRST; i <= HIBERNATION_MAX; i++) {
+		if (!strncmp(buf, hibernation_modes[i], len)) {
 			mode = i;
 			break;
 		}
 	}
-	if (mode) {
+	if (mode != HIBERNATION_INVALID) {
 		switch (mode) {
-		case PM_DISK_SHUTDOWN:
-		case PM_DISK_REBOOT:
-		case PM_DISK_TEST:
-		case PM_DISK_TESTPROC:
-			pm_disk_mode = mode;
+		case HIBERNATION_SHUTDOWN:
+		case HIBERNATION_REBOOT:
+		case HIBERNATION_TEST:
+		case HIBERNATION_TESTPROC:
+			hibernation_mode = mode;
 			break;
-		default:
-			if (pm_ops && pm_ops->enter &&
-			    (mode == pm_ops->pm_disk_mode))
-				pm_disk_mode = mode;
+		case HIBERNATION_PLATFORM:
+			if (hibernation_ops)
+				hibernation_mode = mode;
 			else
 				error = -EINVAL;
 		}
-	} else {
+	} else
 		error = -EINVAL;
-	}
 
-	pr_debug("PM: suspend-to-disk mode set to '%s'\n",
-		 pm_disk_modes[mode]);
+	if (!error)
+		pr_debug("PM: suspend-to-disk mode set to '%s'\n",
+			 hibernation_modes[mode]);
 	mutex_unlock(&pm_mutex);
 	return error ? error : n;
 }
diff --git a/kernel/power/main.c b/kernel/power/main.c
index f6dda68..40d56a3 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -30,7 +30,6 @@
 DEFINE_MUTEX(pm_mutex);
 
 struct pm_ops *pm_ops;
-suspend_disk_method_t pm_disk_mode = PM_DISK_SHUTDOWN;
 
 /**
  *	pm_set_ops - Set the global power method table. 
@@ -41,10 +40,6 @@
 {
 	mutex_lock(&pm_mutex);
 	pm_ops = ops;
-	if (ops && ops->pm_disk_mode != PM_DISK_INVALID) {
-		pm_disk_mode = ops->pm_disk_mode;
-	} else
-		pm_disk_mode = PM_DISK_SHUTDOWN;
 	mutex_unlock(&pm_mutex);
 }
 
@@ -184,24 +179,12 @@
 static const char * const pm_states[PM_SUSPEND_MAX] = {
 	[PM_SUSPEND_STANDBY]	= "standby",
 	[PM_SUSPEND_MEM]	= "mem",
-	[PM_SUSPEND_DISK]	= "disk",
 };
 
 static inline int valid_state(suspend_state_t state)
 {
-	/* Suspend-to-disk does not really need low-level support.
-	 * It can work with shutdown/reboot if needed. If it isn't
-	 * configured, then it cannot be supported.
-	 */
-	if (state == PM_SUSPEND_DISK)
-#ifdef CONFIG_SOFTWARE_SUSPEND
-		return 1;
-#else
-		return 0;
-#endif
-
-	/* all other states need lowlevel support and need to be
-	 * valid to the lowlevel implementation, no valid callback
+	/* All states need lowlevel support and need to be valid
+	 * to the lowlevel implementation, no valid callback
 	 * implies that none are valid. */
 	if (!pm_ops || !pm_ops->valid || !pm_ops->valid(state))
 		return 0;
@@ -229,11 +212,6 @@
 	if (!mutex_trylock(&pm_mutex))
 		return -EBUSY;
 
-	if (state == PM_SUSPEND_DISK) {
-		error = pm_suspend_disk();
-		goto Unlock;
-	}
-
 	pr_debug("PM: Preparing system for %s sleep\n", pm_states[state]);
 	if ((error = suspend_prepare(state)))
 		goto Unlock;
@@ -251,7 +229,7 @@
 
 /**
  *	pm_suspend - Externally visible function for suspending system.
- *	@state:		Enumarted value of state to enter.
+ *	@state:		Enumerated value of state to enter.
  *
  *	Determine whether or not value is within range, get state 
  *	structure, and enter (above).
@@ -289,7 +267,13 @@
 		if (pm_states[i] && valid_state(i))
 			s += sprintf(s,"%s ", pm_states[i]);
 	}
-	s += sprintf(s,"\n");
+#ifdef CONFIG_SOFTWARE_SUSPEND
+	s += sprintf(s, "%s\n", "disk");
+#else
+	if (s != buf)
+		/* convert the last space to a newline */
+		*(s-1) = '\n';
+#endif
 	return (s - buf);
 }
 
@@ -304,6 +288,12 @@
 	p = memchr(buf, '\n', n);
 	len = p ? p - buf : n;
 
+	/* First, check if we are requested to hibernate */
+	if (!strncmp(buf, "disk", len)) {
+		error = hibernate();
+		return error ? error : n;
+	}
+
 	for (s = &pm_states[state]; state < PM_SUSPEND_MAX; s++, state++) {
 		if (*s && !strncmp(buf, *s, len))
 			break;
diff --git a/kernel/power/power.h b/kernel/power/power.h
index 34b4354..5138148 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -25,12 +25,7 @@
  */
 #define SPARE_PAGES	((1024 * 1024) >> PAGE_SHIFT)
 
-extern int pm_suspend_disk(void);
-#else
-static inline int pm_suspend_disk(void)
-{
-	return -EPERM;
-}
+extern struct hibernation_ops *hibernation_ops;
 #endif
 
 extern int pfn_is_nosave(unsigned long);
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index b703977..48383ea 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -1227,7 +1227,7 @@
 	nr_copy_pages = nr_pages;
 	nr_meta_pages = DIV_ROUND_UP(nr_pages * sizeof(long), PAGE_SIZE);
 
-	printk("swsusp: critical section/: done (%d pages copied)\n", nr_pages);
+	printk("swsusp: critical section: done (%d pages copied)\n", nr_pages);
 
 	return 0;
 }
diff --git a/kernel/power/user.c b/kernel/power/user.c
index 040560d..24d7d78 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -130,16 +130,16 @@
 {
 	int error = 0;
 
-	if (pm_ops && pm_ops->prepare)
-		error = pm_ops->prepare(PM_SUSPEND_DISK);
+	if (hibernation_ops)
+		error = hibernation_ops->prepare();
 
 	return error;
 }
 
 static inline void platform_finish(void)
 {
-	if (pm_ops && pm_ops->finish)
-		pm_ops->finish(PM_SUSPEND_DISK);
+	if (hibernation_ops)
+		hibernation_ops->finish();
 }
 
 static inline int snapshot_suspend(int platform_suspend)
@@ -384,7 +384,7 @@
 		switch (arg) {
 
 		case PMOPS_PREPARE:
-			if (pm_ops && pm_ops->enter) {
+			if (hibernation_ops) {
 				data->platform_suspend = 1;
 				error = 0;
 			} else {
@@ -395,8 +395,7 @@
 		case PMOPS_ENTER:
 			if (data->platform_suspend) {
 				kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
-				error = pm_ops->enter(PM_SUSPEND_DISK);
-				error = 0;
+				error = hibernation_ops->enter();
 			}
 			break;
 
diff --git a/kernel/profile.c b/kernel/profile.c
index 9bfadb2..cc91b9b 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -340,6 +340,7 @@
 
 	switch (action) {
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		node = cpu_to_node(cpu);
 		per_cpu(cpu_profile_flip, cpu) = 0;
 		if (!per_cpu(cpu_profile_hits, cpu)[1]) {
@@ -365,10 +366,13 @@
 		__free_page(page);
 		return NOTIFY_BAD;
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		cpu_set(cpu, prof_cpu_mask);
 		break;
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		cpu_clear(cpu, prof_cpu_mask);
 		if (per_cpu(cpu_profile_hits, cpu)[0]) {
 			page = virt_to_page(per_cpu(cpu_profile_hits, cpu)[0]);
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index 3554b76..2c2dd84 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -558,9 +558,11 @@
 	long cpu = (long)hcpu;
 	switch (action) {
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		rcu_online_cpu(cpu);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		rcu_offline_cpu(cpu);
 		break;
 	default:
diff --git a/kernel/relay.c b/kernel/relay.c
index 577f251..61a5049 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -310,16 +310,13 @@
 
 /**
  *	wakeup_readers - wake up readers waiting on a channel
- *	@work: work struct that contains the the channel buffer
+ *	@data: contains the the channel buffer
  *
- *	This is the work function used to defer reader waking.  The
- *	reason waking is deferred is that calling directly from write
- *	causes problems if you're writing from say the scheduler.
+ *	This is the timer function used to defer reader waking.
  */
-static void wakeup_readers(struct work_struct *work)
+static void wakeup_readers(unsigned long data)
 {
-	struct rchan_buf *buf =
-		container_of(work, struct rchan_buf, wake_readers.work);
+	struct rchan_buf *buf = (struct rchan_buf *)data;
 	wake_up_interruptible(&buf->read_wait);
 }
 
@@ -337,11 +334,9 @@
 	if (init) {
 		init_waitqueue_head(&buf->read_wait);
 		kref_init(&buf->kref);
-		INIT_DELAYED_WORK(&buf->wake_readers, NULL);
-	} else {
-		cancel_delayed_work(&buf->wake_readers);
-		flush_scheduled_work();
-	}
+		setup_timer(&buf->timer, wakeup_readers, (unsigned long)buf);
+	} else
+		del_timer_sync(&buf->timer);
 
 	buf->subbufs_produced = 0;
 	buf->subbufs_consumed = 0;
@@ -447,8 +442,7 @@
 static void relay_close_buf(struct rchan_buf *buf)
 {
 	buf->finalized = 1;
-	cancel_delayed_work(&buf->wake_readers);
-	flush_scheduled_work();
+	del_timer_sync(&buf->timer);
 	kref_put(&buf->kref, relay_remove_buf);
 }
 
@@ -490,6 +484,7 @@
 
 	switch(action) {
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		mutex_lock(&relay_channels_mutex);
 		list_for_each_entry(chan, &relay_channels, list) {
 			if (chan->buf[hotcpu])
@@ -506,6 +501,7 @@
 		mutex_unlock(&relay_channels_mutex);
 		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		/* No need to flush the cpu : will be flushed upon
 		 * final relay_flush() call. */
 		break;
@@ -608,11 +604,14 @@
 		buf->dentry->d_inode->i_size += buf->chan->subbuf_size -
 			buf->padding[old_subbuf];
 		smp_mb();
-		if (waitqueue_active(&buf->read_wait)) {
-			PREPARE_DELAYED_WORK(&buf->wake_readers,
-					     wakeup_readers);
-			schedule_delayed_work(&buf->wake_readers, 1);
-		}
+		if (waitqueue_active(&buf->read_wait))
+			/*
+			 * Calling wake_up_interruptible() from here
+			 * will deadlock if we happen to be logging
+			 * from the scheduler (trying to re-grab
+			 * rq->lock), so defer it.
+			 */
+			__mod_timer(&buf->timer, jiffies + 1);
 	}
 
 	old = buf->data;
diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c
index 180978c..12879f6 100644
--- a/kernel/rtmutex.c
+++ b/kernel/rtmutex.c
@@ -56,7 +56,7 @@
  * state.
  */
 
-static void
+void
 rt_mutex_set_owner(struct rt_mutex *lock, struct task_struct *owner,
 		   unsigned long mask)
 {
@@ -81,29 +81,6 @@
 }
 
 /*
- * We can speed up the acquire/release, if the architecture
- * supports cmpxchg and if there's no debugging state to be set up
- */
-#if defined(__HAVE_ARCH_CMPXCHG) && !defined(CONFIG_DEBUG_RT_MUTEXES)
-# define rt_mutex_cmpxchg(l,c,n)	(cmpxchg(&l->owner, c, n) == c)
-static inline void mark_rt_mutex_waiters(struct rt_mutex *lock)
-{
-	unsigned long owner, *p = (unsigned long *) &lock->owner;
-
-	do {
-		owner = *p;
-	} while (cmpxchg(p, owner, owner | RT_MUTEX_HAS_WAITERS) != owner);
-}
-#else
-# define rt_mutex_cmpxchg(l,c,n)	(0)
-static inline void mark_rt_mutex_waiters(struct rt_mutex *lock)
-{
-	lock->owner = (struct task_struct *)
-			((unsigned long)lock->owner | RT_MUTEX_HAS_WAITERS);
-}
-#endif
-
-/*
  * Calculate task priority from the waiter list priority
  *
  * Return task->normal_prio when the waiter list is empty or when
@@ -123,7 +100,7 @@
  *
  * This can be both boosting and unboosting. task->pi_lock must be held.
  */
-static void __rt_mutex_adjust_prio(struct task_struct *task)
+void __rt_mutex_adjust_prio(struct task_struct *task)
 {
 	int prio = rt_mutex_getprio(task);
 
@@ -159,11 +136,11 @@
  * Decreases task's usage by one - may thus free the task.
  * Returns 0 or -EDEADLK.
  */
-static int rt_mutex_adjust_prio_chain(struct task_struct *task,
-				      int deadlock_detect,
-				      struct rt_mutex *orig_lock,
-				      struct rt_mutex_waiter *orig_waiter,
-				      struct task_struct *top_task)
+int rt_mutex_adjust_prio_chain(struct task_struct *task,
+			       int deadlock_detect,
+			       struct rt_mutex *orig_lock,
+			       struct rt_mutex_waiter *orig_waiter,
+			       struct task_struct *top_task)
 {
 	struct rt_mutex *lock;
 	struct rt_mutex_waiter *waiter, *top_waiter = orig_waiter;
@@ -524,8 +501,8 @@
  *
  * Must be called with lock->wait_lock held
  */
-static void remove_waiter(struct rt_mutex *lock,
-			  struct rt_mutex_waiter *waiter)
+void remove_waiter(struct rt_mutex *lock,
+		   struct rt_mutex_waiter *waiter)
 {
 	int first = (waiter == rt_mutex_top_waiter(lock));
 	struct task_struct *owner = rt_mutex_owner(lock);
diff --git a/kernel/rtmutex_common.h b/kernel/rtmutex_common.h
index 9c75856..242ec7e 100644
--- a/kernel/rtmutex_common.h
+++ b/kernel/rtmutex_common.h
@@ -113,6 +113,29 @@
 }
 
 /*
+ * We can speed up the acquire/release, if the architecture
+ * supports cmpxchg and if there's no debugging state to be set up
+ */
+#if defined(__HAVE_ARCH_CMPXCHG) && !defined(CONFIG_DEBUG_RT_MUTEXES)
+# define rt_mutex_cmpxchg(l,c,n)	(cmpxchg(&l->owner, c, n) == c)
+static inline void mark_rt_mutex_waiters(struct rt_mutex *lock)
+{
+	unsigned long owner, *p = (unsigned long *) &lock->owner;
+
+	do {
+		owner = *p;
+	} while (cmpxchg(p, owner, owner | RT_MUTEX_HAS_WAITERS) != owner);
+}
+#else
+# define rt_mutex_cmpxchg(l,c,n)	(0)
+static inline void mark_rt_mutex_waiters(struct rt_mutex *lock)
+{
+	lock->owner = (struct task_struct *)
+			((unsigned long)lock->owner | RT_MUTEX_HAS_WAITERS);
+}
+#endif
+
+/*
  * PI-futex support (proxy locking functions, etc.):
  */
 extern struct task_struct *rt_mutex_next_owner(struct rt_mutex *lock);
@@ -120,4 +143,15 @@
 				       struct task_struct *proxy_owner);
 extern void rt_mutex_proxy_unlock(struct rt_mutex *lock,
 				  struct task_struct *proxy_owner);
+
+extern void rt_mutex_set_owner(struct rt_mutex *lock, struct task_struct *owner,
+			       unsigned long mask);
+extern void __rt_mutex_adjust_prio(struct task_struct *task);
+extern int rt_mutex_adjust_prio_chain(struct task_struct *task,
+				      int deadlock_detect,
+				      struct rt_mutex *orig_lock,
+				      struct rt_mutex_waiter *orig_waiter,
+				      struct task_struct *top_task);
+extern void remove_waiter(struct rt_mutex *lock,
+			  struct rt_mutex_waiter *waiter);
 #endif
diff --git a/kernel/sched.c b/kernel/sched.c
index 66bd7ff..799d23b 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -305,6 +305,7 @@
 };
 
 static DEFINE_PER_CPU(struct rq, runqueues) ____cacheline_aligned_in_smp;
+static DEFINE_MUTEX(sched_hotcpu_mutex);
 
 static inline int cpu_of(struct rq *rq)
 {
@@ -4520,13 +4521,13 @@
 	struct task_struct *p;
 	int retval;
 
-	lock_cpu_hotplug();
+	mutex_lock(&sched_hotcpu_mutex);
 	read_lock(&tasklist_lock);
 
 	p = find_process_by_pid(pid);
 	if (!p) {
 		read_unlock(&tasklist_lock);
-		unlock_cpu_hotplug();
+		mutex_unlock(&sched_hotcpu_mutex);
 		return -ESRCH;
 	}
 
@@ -4553,7 +4554,7 @@
 
 out_unlock:
 	put_task_struct(p);
-	unlock_cpu_hotplug();
+	mutex_unlock(&sched_hotcpu_mutex);
 	return retval;
 }
 
@@ -4610,7 +4611,7 @@
 	struct task_struct *p;
 	int retval;
 
-	lock_cpu_hotplug();
+	mutex_lock(&sched_hotcpu_mutex);
 	read_lock(&tasklist_lock);
 
 	retval = -ESRCH;
@@ -4626,7 +4627,7 @@
 
 out_unlock:
 	read_unlock(&tasklist_lock);
-	unlock_cpu_hotplug();
+	mutex_unlock(&sched_hotcpu_mutex);
 	if (retval)
 		return retval;
 
@@ -5388,7 +5389,12 @@
 	struct rq *rq;
 
 	switch (action) {
+	case CPU_LOCK_ACQUIRE:
+		mutex_lock(&sched_hotcpu_mutex);
+		break;
+
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		p = kthread_create(migration_thread, hcpu, "migration/%d",cpu);
 		if (IS_ERR(p))
 			return NOTIFY_BAD;
@@ -5402,12 +5408,14 @@
 		break;
 
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		/* Strictly unneccessary, as first user will wake it. */
 		wake_up_process(cpu_rq(cpu)->migration_thread);
 		break;
 
 #ifdef CONFIG_HOTPLUG_CPU
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 		if (!cpu_rq(cpu)->migration_thread)
 			break;
 		/* Unbind it from offline cpu so it can run.  Fall thru. */
@@ -5418,6 +5426,7 @@
 		break;
 
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		migrate_live_tasks(cpu);
 		rq = cpu_rq(cpu);
 		kthread_stop(rq->migration_thread);
@@ -5433,7 +5442,7 @@
 		BUG_ON(rq->nr_running != 0);
 
 		/* No need to migrate the tasks: it was best-effort if
-		 * they didn't do lock_cpu_hotplug().  Just wake up
+		 * they didn't take sched_hotcpu_mutex.  Just wake up
 		 * the requestors. */
 		spin_lock_irq(&rq->lock);
 		while (!list_empty(&rq->migration_queue)) {
@@ -5447,6 +5456,9 @@
 		spin_unlock_irq(&rq->lock);
 		break;
 #endif
+	case CPU_LOCK_RELEASE:
+		mutex_unlock(&sched_hotcpu_mutex);
+		break;
 	}
 	return NOTIFY_OK;
 }
@@ -6822,10 +6834,10 @@
 {
 	int err;
 
-	lock_cpu_hotplug();
+	mutex_lock(&sched_hotcpu_mutex);
 	detach_destroy_domains(&cpu_online_map);
 	err = arch_init_sched_domains(&cpu_online_map);
-	unlock_cpu_hotplug();
+	mutex_unlock(&sched_hotcpu_mutex);
 
 	return err;
 }
@@ -6904,14 +6916,20 @@
 {
 	switch (action) {
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 	case CPU_DOWN_PREPARE:
+	case CPU_DOWN_PREPARE_FROZEN:
 		detach_destroy_domains(&cpu_online_map);
 		return NOTIFY_OK;
 
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 	case CPU_DOWN_FAILED:
+	case CPU_DOWN_FAILED_FROZEN:
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		/*
 		 * Fall through and re-initialise the domains.
 		 */
@@ -6930,12 +6948,12 @@
 {
 	cpumask_t non_isolated_cpus;
 
-	lock_cpu_hotplug();
+	mutex_lock(&sched_hotcpu_mutex);
 	arch_init_sched_domains(&cpu_online_map);
 	cpus_andnot(non_isolated_cpus, cpu_possible_map, cpu_isolated_map);
 	if (cpus_empty(non_isolated_cpus))
 		cpu_set(smp_processor_id(), non_isolated_cpus);
-	unlock_cpu_hotplug();
+	mutex_unlock(&sched_hotcpu_mutex);
 	/* XXX: Theoretical race here - CPU may be hotplugged now */
 	hotcpu_notifier(update_sched_domains, 0);
 
diff --git a/kernel/signal.c b/kernel/signal.c
index 1368e67..2ac3a66 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -38,125 +38,6 @@
 
 static struct kmem_cache *sigqueue_cachep;
 
-/*
- * In POSIX a signal is sent either to a specific thread (Linux task)
- * or to the process as a whole (Linux thread group).  How the signal
- * is sent determines whether it's to one thread or the whole group,
- * which determines which signal mask(s) are involved in blocking it
- * from being delivered until later.  When the signal is delivered,
- * either it's caught or ignored by a user handler or it has a default
- * effect that applies to the whole thread group (POSIX process).
- *
- * The possible effects an unblocked signal set to SIG_DFL can have are:
- *   ignore	- Nothing Happens
- *   terminate	- kill the process, i.e. all threads in the group,
- * 		  similar to exit_group.  The group leader (only) reports
- *		  WIFSIGNALED status to its parent.
- *   coredump	- write a core dump file describing all threads using
- *		  the same mm and then kill all those threads
- *   stop 	- stop all the threads in the group, i.e. TASK_STOPPED state
- *
- * SIGKILL and SIGSTOP cannot be caught, blocked, or ignored.
- * Other signals when not blocked and set to SIG_DFL behaves as follows.
- * The job control signals also have other special effects.
- *
- *	+--------------------+------------------+
- *	|  POSIX signal      |  default action  |
- *	+--------------------+------------------+
- *	|  SIGHUP            |  terminate	|
- *	|  SIGINT            |	terminate	|
- *	|  SIGQUIT           |	coredump 	|
- *	|  SIGILL            |	coredump 	|
- *	|  SIGTRAP           |	coredump 	|
- *	|  SIGABRT/SIGIOT    |	coredump 	|
- *	|  SIGBUS            |	coredump 	|
- *	|  SIGFPE            |	coredump 	|
- *	|  SIGKILL           |	terminate(+)	|
- *	|  SIGUSR1           |	terminate	|
- *	|  SIGSEGV           |	coredump 	|
- *	|  SIGUSR2           |	terminate	|
- *	|  SIGPIPE           |	terminate	|
- *	|  SIGALRM           |	terminate	|
- *	|  SIGTERM           |	terminate	|
- *	|  SIGCHLD           |	ignore   	|
- *	|  SIGCONT           |	ignore(*)	|
- *	|  SIGSTOP           |	stop(*)(+)  	|
- *	|  SIGTSTP           |	stop(*)  	|
- *	|  SIGTTIN           |	stop(*)  	|
- *	|  SIGTTOU           |	stop(*)  	|
- *	|  SIGURG            |	ignore   	|
- *	|  SIGXCPU           |	coredump 	|
- *	|  SIGXFSZ           |	coredump 	|
- *	|  SIGVTALRM         |	terminate	|
- *	|  SIGPROF           |	terminate	|
- *	|  SIGPOLL/SIGIO     |	terminate	|
- *	|  SIGSYS/SIGUNUSED  |	coredump 	|
- *	|  SIGSTKFLT         |	terminate	|
- *	|  SIGWINCH          |	ignore   	|
- *	|  SIGPWR            |	terminate	|
- *	|  SIGRTMIN-SIGRTMAX |	terminate       |
- *	+--------------------+------------------+
- *	|  non-POSIX signal  |  default action  |
- *	+--------------------+------------------+
- *	|  SIGEMT            |  coredump	|
- *	+--------------------+------------------+
- *
- * (+) For SIGKILL and SIGSTOP the action is "always", not just "default".
- * (*) Special job control effects:
- * When SIGCONT is sent, it resumes the process (all threads in the group)
- * from TASK_STOPPED state and also clears any pending/queued stop signals
- * (any of those marked with "stop(*)").  This happens regardless of blocking,
- * catching, or ignoring SIGCONT.  When any stop signal is sent, it clears
- * any pending/queued SIGCONT signals; this happens regardless of blocking,
- * catching, or ignored the stop signal, though (except for SIGSTOP) the
- * default action of stopping the process may happen later or never.
- */
-
-#ifdef SIGEMT
-#define M_SIGEMT	M(SIGEMT)
-#else
-#define M_SIGEMT	0
-#endif
-
-#if SIGRTMIN > BITS_PER_LONG
-#define M(sig) (1ULL << ((sig)-1))
-#else
-#define M(sig) (1UL << ((sig)-1))
-#endif
-#define T(sig, mask) (M(sig) & (mask))
-
-#define SIG_KERNEL_ONLY_MASK (\
-	M(SIGKILL)   |  M(SIGSTOP)                                   )
-
-#define SIG_KERNEL_STOP_MASK (\
-	M(SIGSTOP)   |  M(SIGTSTP)   |  M(SIGTTIN)   |  M(SIGTTOU)   )
-
-#define SIG_KERNEL_COREDUMP_MASK (\
-        M(SIGQUIT)   |  M(SIGILL)    |  M(SIGTRAP)   |  M(SIGABRT)   | \
-        M(SIGFPE)    |  M(SIGSEGV)   |  M(SIGBUS)    |  M(SIGSYS)    | \
-        M(SIGXCPU)   |  M(SIGXFSZ)   |  M_SIGEMT                     )
-
-#define SIG_KERNEL_IGNORE_MASK (\
-        M(SIGCONT)   |  M(SIGCHLD)   |  M(SIGWINCH)  |  M(SIGURG)    )
-
-#define sig_kernel_only(sig) \
-		(((sig) < SIGRTMIN)  && T(sig, SIG_KERNEL_ONLY_MASK))
-#define sig_kernel_coredump(sig) \
-		(((sig) < SIGRTMIN)  && T(sig, SIG_KERNEL_COREDUMP_MASK))
-#define sig_kernel_ignore(sig) \
-		(((sig) < SIGRTMIN)  && T(sig, SIG_KERNEL_IGNORE_MASK))
-#define sig_kernel_stop(sig) \
-		(((sig) < SIGRTMIN)  && T(sig, SIG_KERNEL_STOP_MASK))
-
-#define sig_needs_tasklist(sig)	((sig) == SIGCONT)
-
-#define sig_user_defined(t, signr) \
-	(((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_DFL) &&	\
-	 ((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_IGN))
-
-#define sig_fatal(t, signr) \
-	(!T(signr, SIG_KERNEL_IGNORE_MASK|SIG_KERNEL_STOP_MASK) && \
-	 (t)->sighand->action[(signr)-1].sa.sa_handler == SIG_DFL)
 
 static int sig_ignored(struct task_struct *t, int sig)
 {
@@ -328,6 +209,16 @@
 	spin_unlock_irqrestore(&t->sighand->siglock, flags);
 }
 
+void ignore_signals(struct task_struct *t)
+{
+	int i;
+
+	for (i = 0; i < _NSIG; ++i)
+		t->sighand->action[i].sa.sa_handler = SIG_IGN;
+
+	flush_signals(t);
+}
+
 /*
  * Flush all handlers for a task.
  */
@@ -1032,17 +923,6 @@
 		if (t->exit_state)
 			continue;
 
-		/*
-		 * We don't want to notify the parent, since we are
-		 * killed as part of a thread group due to another
-		 * thread doing an execve() or similar. So set the
-		 * exit signal to -1 to allow immediate reaping of
-		 * the process.  But don't detach the thread group
-		 * leader.
-		 */
-		if (t != p->group_leader)
-			t->exit_signal = -1;
-
 		/* SIGKILL will be handled before any pending SIGSTOP */
 		sigaddset(&t->pending.signal, SIGKILL);
 		signal_wake_up(t, 1);
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 8b75008..0b9886a 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -593,6 +593,7 @@
 
 	switch (action) {
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		p = kthread_create(ksoftirqd, hcpu, "ksoftirqd/%d", hotcpu);
 		if (IS_ERR(p)) {
 			printk("ksoftirqd for %i failed\n", hotcpu);
@@ -602,16 +603,19 @@
   		per_cpu(ksoftirqd, hotcpu) = p;
  		break;
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		wake_up_process(per_cpu(ksoftirqd, hotcpu));
 		break;
 #ifdef CONFIG_HOTPLUG_CPU
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 		if (!per_cpu(ksoftirqd, hotcpu))
 			break;
 		/* Unbind so it can run.  Fall thru. */
 		kthread_bind(per_cpu(ksoftirqd, hotcpu),
 			     any_online_cpu(cpu_online_map));
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		p = per_cpu(ksoftirqd, hotcpu);
 		per_cpu(ksoftirqd, hotcpu) = NULL;
 		kthread_stop(p);
diff --git a/kernel/softlockup.c b/kernel/softlockup.c
index 8fa7040..0131e29 100644
--- a/kernel/softlockup.c
+++ b/kernel/softlockup.c
@@ -146,6 +146,7 @@
 
 	switch (action) {
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		BUG_ON(per_cpu(watchdog_task, hotcpu));
 		p = kthread_create(watchdog, hcpu, "watchdog/%d", hotcpu);
 		if (IS_ERR(p)) {
@@ -157,16 +158,19 @@
 		kthread_bind(p, hotcpu);
  		break;
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 		wake_up_process(per_cpu(watchdog_task, hotcpu));
 		break;
 #ifdef CONFIG_HOTPLUG_CPU
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 		if (!per_cpu(watchdog_task, hotcpu))
 			break;
 		/* Unbind so it can run.  Fall thru. */
 		kthread_bind(per_cpu(watchdog_task, hotcpu),
 			     any_online_cpu(cpu_online_map));
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		p = per_cpu(watchdog_task, hotcpu);
 		per_cpu(watchdog_task, hotcpu) = NULL;
 		kthread_stop(p);
diff --git a/kernel/sys.c b/kernel/sys.c
index 926bf9d..d4985df 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -134,19 +134,39 @@
 	return -ENOENT;
 }
 
+/**
+ * notifier_call_chain - Informs the registered notifiers about an event.
+ *	@nl:		Pointer to head of the blocking notifier chain
+ *	@val:		Value passed unmodified to notifier function
+ *	@v:		Pointer passed unmodified to notifier function
+ *	@nr_to_call:	Number of notifier functions to be called. Don't care
+ *		     	value of this parameter is -1.
+ *	@nr_calls:	Records the number of notifications sent. Don't care
+ *		   	value of this field is NULL.
+ * 	@returns:	notifier_call_chain returns the value returned by the
+ *			last notifier function called.
+ */
+
 static int __kprobes notifier_call_chain(struct notifier_block **nl,
-		unsigned long val, void *v)
+					unsigned long val, void *v,
+					int nr_to_call,	int *nr_calls)
 {
 	int ret = NOTIFY_DONE;
 	struct notifier_block *nb, *next_nb;
 
 	nb = rcu_dereference(*nl);
-	while (nb) {
+
+	while (nb && nr_to_call) {
 		next_nb = rcu_dereference(nb->next);
 		ret = nb->notifier_call(nb, val, v);
+
+		if (nr_calls)
+			(*nr_calls)++;
+
 		if ((ret & NOTIFY_STOP_MASK) == NOTIFY_STOP_MASK)
 			break;
 		nb = next_nb;
+		nr_to_call--;
 	}
 	return ret;
 }
@@ -205,10 +225,12 @@
 EXPORT_SYMBOL_GPL(atomic_notifier_chain_unregister);
 
 /**
- *	atomic_notifier_call_chain - Call functions in an atomic notifier chain
+ *	__atomic_notifier_call_chain - Call functions in an atomic notifier chain
  *	@nh: Pointer to head of the atomic notifier chain
  *	@val: Value passed unmodified to notifier function
  *	@v: Pointer passed unmodified to notifier function
+ *	@nr_to_call: See the comment for notifier_call_chain.
+ *	@nr_calls: See the comment for notifier_call_chain.
  *
  *	Calls each function in a notifier chain in turn.  The functions
  *	run in an atomic context, so they must not block.
@@ -222,19 +244,27 @@
  *	of the last notifier function called.
  */
  
-int __kprobes atomic_notifier_call_chain(struct atomic_notifier_head *nh,
-		unsigned long val, void *v)
+int __kprobes __atomic_notifier_call_chain(struct atomic_notifier_head *nh,
+					unsigned long val, void *v,
+					int nr_to_call, int *nr_calls)
 {
 	int ret;
 
 	rcu_read_lock();
-	ret = notifier_call_chain(&nh->head, val, v);
+	ret = notifier_call_chain(&nh->head, val, v, nr_to_call, nr_calls);
 	rcu_read_unlock();
 	return ret;
 }
 
-EXPORT_SYMBOL_GPL(atomic_notifier_call_chain);
+EXPORT_SYMBOL_GPL(__atomic_notifier_call_chain);
 
+int __kprobes atomic_notifier_call_chain(struct atomic_notifier_head *nh,
+		unsigned long val, void *v)
+{
+	return __atomic_notifier_call_chain(nh, val, v, -1, NULL);
+}
+
+EXPORT_SYMBOL_GPL(atomic_notifier_call_chain);
 /*
  *	Blocking notifier chain routines.  All access to the chain is
  *	synchronized by an rwsem.
@@ -304,10 +334,12 @@
 EXPORT_SYMBOL_GPL(blocking_notifier_chain_unregister);
 
 /**
- *	blocking_notifier_call_chain - Call functions in a blocking notifier chain
+ *	__blocking_notifier_call_chain - Call functions in a blocking notifier chain
  *	@nh: Pointer to head of the blocking notifier chain
  *	@val: Value passed unmodified to notifier function
  *	@v: Pointer passed unmodified to notifier function
+ *	@nr_to_call: See comment for notifier_call_chain.
+ *	@nr_calls: See comment for notifier_call_chain.
  *
  *	Calls each function in a notifier chain in turn.  The functions
  *	run in a process context, so they are allowed to block.
@@ -320,8 +352,9 @@
  *	of the last notifier function called.
  */
  
-int blocking_notifier_call_chain(struct blocking_notifier_head *nh,
-		unsigned long val, void *v)
+int __blocking_notifier_call_chain(struct blocking_notifier_head *nh,
+				   unsigned long val, void *v,
+				   int nr_to_call, int *nr_calls)
 {
 	int ret = NOTIFY_DONE;
 
@@ -332,12 +365,19 @@
 	 */
 	if (rcu_dereference(nh->head)) {
 		down_read(&nh->rwsem);
-		ret = notifier_call_chain(&nh->head, val, v);
+		ret = notifier_call_chain(&nh->head, val, v, nr_to_call,
+					nr_calls);
 		up_read(&nh->rwsem);
 	}
 	return ret;
 }
+EXPORT_SYMBOL_GPL(__blocking_notifier_call_chain);
 
+int blocking_notifier_call_chain(struct blocking_notifier_head *nh,
+		unsigned long val, void *v)
+{
+	return __blocking_notifier_call_chain(nh, val, v, -1, NULL);
+}
 EXPORT_SYMBOL_GPL(blocking_notifier_call_chain);
 
 /*
@@ -383,10 +423,12 @@
 EXPORT_SYMBOL_GPL(raw_notifier_chain_unregister);
 
 /**
- *	raw_notifier_call_chain - Call functions in a raw notifier chain
+ *	__raw_notifier_call_chain - Call functions in a raw notifier chain
  *	@nh: Pointer to head of the raw notifier chain
  *	@val: Value passed unmodified to notifier function
  *	@v: Pointer passed unmodified to notifier function
+ *	@nr_to_call: See comment for notifier_call_chain.
+ *	@nr_calls: See comment for notifier_call_chain
  *
  *	Calls each function in a notifier chain in turn.  The functions
  *	run in an undefined context.
@@ -400,10 +442,19 @@
  *	of the last notifier function called.
  */
 
+int __raw_notifier_call_chain(struct raw_notifier_head *nh,
+			      unsigned long val, void *v,
+			      int nr_to_call, int *nr_calls)
+{
+	return notifier_call_chain(&nh->head, val, v, nr_to_call, nr_calls);
+}
+
+EXPORT_SYMBOL_GPL(__raw_notifier_call_chain);
+
 int raw_notifier_call_chain(struct raw_notifier_head *nh,
 		unsigned long val, void *v)
 {
-	return notifier_call_chain(&nh->head, val, v);
+	return __raw_notifier_call_chain(nh, val, v, -1, NULL);
 }
 
 EXPORT_SYMBOL_GPL(raw_notifier_call_chain);
@@ -478,10 +529,12 @@
 EXPORT_SYMBOL_GPL(srcu_notifier_chain_unregister);
 
 /**
- *	srcu_notifier_call_chain - Call functions in an SRCU notifier chain
+ *	__srcu_notifier_call_chain - Call functions in an SRCU notifier chain
  *	@nh: Pointer to head of the SRCU notifier chain
  *	@val: Value passed unmodified to notifier function
  *	@v: Pointer passed unmodified to notifier function
+ *	@nr_to_call: See comment for notifier_call_chain.
+ *	@nr_calls: See comment for notifier_call_chain
  *
  *	Calls each function in a notifier chain in turn.  The functions
  *	run in a process context, so they are allowed to block.
@@ -494,18 +547,25 @@
  *	of the last notifier function called.
  */
 
-int srcu_notifier_call_chain(struct srcu_notifier_head *nh,
-		unsigned long val, void *v)
+int __srcu_notifier_call_chain(struct srcu_notifier_head *nh,
+			       unsigned long val, void *v,
+			       int nr_to_call, int *nr_calls)
 {
 	int ret;
 	int idx;
 
 	idx = srcu_read_lock(&nh->srcu);
-	ret = notifier_call_chain(&nh->head, val, v);
+	ret = notifier_call_chain(&nh->head, val, v, nr_to_call, nr_calls);
 	srcu_read_unlock(&nh->srcu, idx);
 	return ret;
 }
+EXPORT_SYMBOL_GPL(__srcu_notifier_call_chain);
 
+int srcu_notifier_call_chain(struct srcu_notifier_head *nh,
+		unsigned long val, void *v)
+{
+	return __srcu_notifier_call_chain(nh, val, v, -1, NULL);
+}
 EXPORT_SYMBOL_GPL(srcu_notifier_call_chain);
 
 /**
@@ -881,7 +941,7 @@
 #ifdef CONFIG_SOFTWARE_SUSPEND
 	case LINUX_REBOOT_CMD_SW_SUSPEND:
 		{
-			int ret = pm_suspend(PM_SUSPEND_DISK);
+			int ret = hibernate();
 			unlock_kernel();
 			return ret;
 		}
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index f0664bd..4073353 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -77,6 +77,7 @@
 extern int percpu_pagelist_fraction;
 extern int compat_log;
 extern int maps_protect;
+extern int sysctl_stat_interval;
 
 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
 static int maxolduid = 65535;
@@ -857,6 +858,17 @@
 		.extra2		= &one_hundred,
 	},
 #endif
+#ifdef CONFIG_SMP
+	{
+		.ctl_name	= CTL_UNNUMBERED,
+		.procname	= "stat_interval",
+		.data		= &sysctl_stat_interval,
+		.maxlen		= sizeof(sysctl_stat_interval),
+		.mode		= 0644,
+		.proc_handler	= &proc_dointvec_jiffies,
+		.strategy	= &sysctl_jiffies,
+	},
+#endif
 #if defined(CONFIG_X86_32) || \
    (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
 	{
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index fe5c7db..3db5c3c 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -74,15 +74,17 @@
 static struct timer_list watchdog_timer;
 static DEFINE_SPINLOCK(watchdog_lock);
 static cycle_t watchdog_last;
+static int watchdog_resumed;
+
 /*
- * Interval: 0.5sec Treshold: 0.0625s
+ * Interval: 0.5sec Threshold: 0.0625s
  */
 #define WATCHDOG_INTERVAL (HZ >> 1)
-#define WATCHDOG_TRESHOLD (NSEC_PER_SEC >> 4)
+#define WATCHDOG_THRESHOLD (NSEC_PER_SEC >> 4)
 
 static void clocksource_ratewd(struct clocksource *cs, int64_t delta)
 {
-	if (delta > -WATCHDOG_TRESHOLD && delta < WATCHDOG_TRESHOLD)
+	if (delta > -WATCHDOG_THRESHOLD && delta < WATCHDOG_THRESHOLD)
 		return;
 
 	printk(KERN_WARNING "Clocksource %s unstable (delta = %Ld ns)\n",
@@ -98,15 +100,26 @@
 	struct clocksource *cs, *tmp;
 	cycle_t csnow, wdnow;
 	int64_t wd_nsec, cs_nsec;
+	int resumed;
 
 	spin_lock(&watchdog_lock);
 
+	resumed = watchdog_resumed;
+	if (unlikely(resumed))
+		watchdog_resumed = 0;
+
 	wdnow = watchdog->read();
 	wd_nsec = cyc2ns(watchdog, (wdnow - watchdog_last) & watchdog->mask);
 	watchdog_last = wdnow;
 
 	list_for_each_entry_safe(cs, tmp, &watchdog_list, wd_list) {
 		csnow = cs->read();
+
+		if (unlikely(resumed)) {
+			cs->wd_last = csnow;
+			continue;
+		}
+
 		/* Initialized ? */
 		if (!(cs->flags & CLOCK_SOURCE_WATCHDOG)) {
 			if ((cs->flags & CLOCK_SOURCE_IS_CONTINUOUS) &&
@@ -136,6 +149,13 @@
 	}
 	spin_unlock(&watchdog_lock);
 }
+static void clocksource_resume_watchdog(void)
+{
+	spin_lock(&watchdog_lock);
+	watchdog_resumed = 1;
+	spin_unlock(&watchdog_lock);
+}
+
 static void clocksource_check_watchdog(struct clocksource *cs)
 {
 	struct clocksource *cse;
@@ -182,9 +202,34 @@
 	if (cs->flags & CLOCK_SOURCE_IS_CONTINUOUS)
 		cs->flags |= CLOCK_SOURCE_VALID_FOR_HRES;
 }
+
+static inline void clocksource_resume_watchdog(void) { }
 #endif
 
 /**
+ * clocksource_resume - resume the clocksource(s)
+ */
+void clocksource_resume(void)
+{
+	struct list_head *tmp;
+	unsigned long flags;
+
+	spin_lock_irqsave(&clocksource_lock, flags);
+
+	list_for_each(tmp, &clocksource_list) {
+		struct clocksource *cs;
+
+		cs = list_entry(tmp, struct clocksource, list);
+		if (cs->resume)
+			cs->resume();
+	}
+
+	clocksource_resume_watchdog();
+
+	spin_unlock_irqrestore(&clocksource_lock, flags);
+}
+
+/**
  * clocksource_get_next - Returns the selected clocksource
  *
  */
diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index b734ca4..8bbcfb7 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -65,7 +65,7 @@
 	SEQ_printf(m, ", %s/%d", tmp, timer->start_pid);
 #endif
 	SEQ_printf(m, "\n");
-	SEQ_printf(m, " # expires at %Ld nsecs [in %Ld nsecs]\n",
+	SEQ_printf(m, " # expires at %Lu nsecs [in %Lu nsecs]\n",
 		(unsigned long long)ktime_to_ns(timer->expires),
 		(unsigned long long)(ktime_to_ns(timer->expires) - now));
 }
@@ -111,14 +111,14 @@
 {
 	SEQ_printf(m, "  .index:      %d\n",
 			base->index);
-	SEQ_printf(m, "  .resolution: %Ld nsecs\n",
+	SEQ_printf(m, "  .resolution: %Lu nsecs\n",
 			(unsigned long long)ktime_to_ns(base->resolution));
 	SEQ_printf(m,   "  .get_time:   ");
 	print_name_offset(m, base->get_time);
 	SEQ_printf(m,   "\n");
 #ifdef CONFIG_HIGH_RES_TIMERS
-	SEQ_printf(m, "  .offset:     %Ld nsecs\n",
-			ktime_to_ns(base->offset));
+	SEQ_printf(m, "  .offset:     %Lu nsecs\n",
+		   (unsigned long long) ktime_to_ns(base->offset));
 #endif
 	SEQ_printf(m,   "active timers:\n");
 	print_active_timers(m, base, now);
@@ -135,10 +135,11 @@
 		print_base(m, cpu_base->clock_base + i, now);
 	}
 #define P(x) \
-	SEQ_printf(m, "  .%-15s: %Ld\n", #x, (u64)(cpu_base->x))
+	SEQ_printf(m, "  .%-15s: %Lu\n", #x, \
+		   (unsigned long long)(cpu_base->x))
 #define P_ns(x) \
-	SEQ_printf(m, "  .%-15s: %Ld nsecs\n", #x, \
-		(u64)(ktime_to_ns(cpu_base->x)))
+	SEQ_printf(m, "  .%-15s: %Lu nsecs\n", #x, \
+		   (unsigned long long)(ktime_to_ns(cpu_base->x)))
 
 #ifdef CONFIG_HIGH_RES_TIMERS
 	P_ns(expires_next);
@@ -150,10 +151,11 @@
 
 #ifdef CONFIG_TICK_ONESHOT
 # define P(x) \
-	SEQ_printf(m, "  .%-15s: %Ld\n", #x, (u64)(ts->x))
+	SEQ_printf(m, "  .%-15s: %Lu\n", #x, \
+		   (unsigned long long)(ts->x))
 # define P_ns(x) \
-	SEQ_printf(m, "  .%-15s: %Ld nsecs\n", #x, \
-		(u64)(ktime_to_ns(ts->x)))
+	SEQ_printf(m, "  .%-15s: %Lu nsecs\n", #x, \
+		   (unsigned long long)(ktime_to_ns(ts->x)))
 	{
 		struct tick_sched *ts = tick_get_tick_sched(cpu);
 		P(nohz_mode);
@@ -167,7 +169,8 @@
 		P(last_jiffies);
 		P(next_jiffies);
 		P_ns(idle_expires);
-		SEQ_printf(m, "jiffies: %Ld\n", (u64)jiffies);
+		SEQ_printf(m, "jiffies: %Lu\n",
+			   (unsigned long long)jiffies);
 	}
 #endif
 
diff --git a/kernel/timer.c b/kernel/timer.c
index 7a64483..59a28b1 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -92,24 +92,24 @@
 /* Functions below help us manage 'deferrable' flag */
 static inline unsigned int tbase_get_deferrable(tvec_base_t *base)
 {
-	return ((unsigned int)(unsigned long)base & TBASE_DEFERRABLE_FLAG);
+	return (unsigned int)((unsigned long)base & TBASE_DEFERRABLE_FLAG);
 }
 
 static inline tvec_base_t *tbase_get_base(tvec_base_t *base)
 {
-	return ((tvec_base_t *)((unsigned long)base & ~TBASE_DEFERRABLE_FLAG));
+	return (tvec_base_t *)((unsigned long)base & ~TBASE_DEFERRABLE_FLAG);
 }
 
 static inline void timer_set_deferrable(struct timer_list *timer)
 {
-	timer->base = ((tvec_base_t *)((unsigned long)(timer->base) |
-	                               TBASE_DEFERRABLE_FLAG));
+	timer->base = (tvec_base_t *)((unsigned long)timer->base |
+	                               TBASE_DEFERRABLE_FLAG);
 }
 
 static inline void
 timer_set_base(struct timer_list *timer, tvec_base_t *new_base)
 {
-	timer->base = (tvec_base_t *)((unsigned long)(new_base) |
+	timer->base = (tvec_base_t *)((unsigned long)new_base |
 	                              tbase_get_deferrable(timer->base));
 }
 
@@ -1293,11 +1293,13 @@
 	long cpu = (long)hcpu;
 	switch(action) {
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		if (init_timers_cpu(cpu) < 0)
 			return NOTIFY_BAD;
 		break;
 #ifdef CONFIG_HOTPLUG_CPU
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		migrate_timers(cpu);
 		break;
 #endif
@@ -1497,6 +1499,8 @@
 		prev = &curr->next;
 	}
 
+	clocksource_resume();
+
 	write_seqlock_irqsave(&xtime_lock, flags);
 	if (ti == time_interpolator) {
 		/* we lost the best time-interpolator: */
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index b6fa5e6..fb56fed 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -36,30 +36,20 @@
 /*
  * The per-CPU workqueue (if single thread, we always use the first
  * possible cpu).
- *
- * The sequence counters are for flush_scheduled_work().  It wants to wait
- * until all currently-scheduled works are completed, but it doesn't
- * want to be livelocked by new, incoming ones.  So it waits until
- * remove_sequence is >= the insert_sequence which pertained when
- * flush_scheduled_work() was called.
  */
 struct cpu_workqueue_struct {
 
 	spinlock_t lock;
 
-	long remove_sequence;	/* Least-recently added (next to run) */
-	long insert_sequence;	/* Next to add */
-
 	struct list_head worklist;
 	wait_queue_head_t more_work;
-	wait_queue_head_t work_done;
+	struct work_struct *current_work;
 
 	struct workqueue_struct *wq;
 	struct task_struct *thread;
+	int should_stop;
 
 	int run_depth;		/* Detect run_workqueue() recursion depth */
-
-	int freezeable;		/* Freeze the thread during suspend */
 } ____cacheline_aligned;
 
 /*
@@ -68,8 +58,10 @@
  */
 struct workqueue_struct {
 	struct cpu_workqueue_struct *cpu_wq;
+	struct list_head list;
 	const char *name;
-	struct list_head list; 	/* Empty if single thread */
+	int singlethread;
+	int freezeable;		/* Freeze threads during suspend */
 };
 
 /* All the per-cpu workqueues on the system, for hotplug cpu to add/remove
@@ -77,107 +69,69 @@
 static DEFINE_MUTEX(workqueue_mutex);
 static LIST_HEAD(workqueues);
 
-static int singlethread_cpu;
+static int singlethread_cpu __read_mostly;
+static cpumask_t cpu_singlethread_map __read_mostly;
+/* optimization, we could use cpu_possible_map */
+static cpumask_t cpu_populated_map __read_mostly;
 
 /* If it's single threaded, it isn't in the list of workqueues. */
 static inline int is_single_threaded(struct workqueue_struct *wq)
 {
-	return list_empty(&wq->list);
+	return wq->singlethread;
+}
+
+static const cpumask_t *wq_cpu_map(struct workqueue_struct *wq)
+{
+	return is_single_threaded(wq)
+		? &cpu_singlethread_map : &cpu_populated_map;
+}
+
+static
+struct cpu_workqueue_struct *wq_per_cpu(struct workqueue_struct *wq, int cpu)
+{
+	if (unlikely(is_single_threaded(wq)))
+		cpu = singlethread_cpu;
+	return per_cpu_ptr(wq->cpu_wq, cpu);
 }
 
 /*
  * Set the workqueue on which a work item is to be run
  * - Must *only* be called if the pending flag is set
  */
-static inline void set_wq_data(struct work_struct *work, void *wq)
+static inline void set_wq_data(struct work_struct *work,
+				struct cpu_workqueue_struct *cwq)
 {
 	unsigned long new;
 
 	BUG_ON(!work_pending(work));
 
-	new = (unsigned long) wq | (1UL << WORK_STRUCT_PENDING);
+	new = (unsigned long) cwq | (1UL << WORK_STRUCT_PENDING);
 	new |= WORK_STRUCT_FLAG_MASK & *work_data_bits(work);
 	atomic_long_set(&work->data, new);
 }
 
-static inline void *get_wq_data(struct work_struct *work)
+static inline
+struct cpu_workqueue_struct *get_wq_data(struct work_struct *work)
 {
 	return (void *) (atomic_long_read(&work->data) & WORK_STRUCT_WQ_DATA_MASK);
 }
 
-static int __run_work(struct cpu_workqueue_struct *cwq, struct work_struct *work)
+static void insert_work(struct cpu_workqueue_struct *cwq,
+				struct work_struct *work, int tail)
 {
-	int ret = 0;
-	unsigned long flags;
-
-	spin_lock_irqsave(&cwq->lock, flags);
+	set_wq_data(work, cwq);
 	/*
-	 * We need to re-validate the work info after we've gotten
-	 * the cpu_workqueue lock. We can run the work now iff:
-	 *
-	 *  - the wq_data still matches the cpu_workqueue_struct
-	 *  - AND the work is still marked pending
-	 *  - AND the work is still on a list (which will be this
-	 *    workqueue_struct list)
-	 *
-	 * All these conditions are important, because we
-	 * need to protect against the work being run right
-	 * now on another CPU (all but the last one might be
-	 * true if it's currently running and has not been
-	 * released yet, for example).
+	 * Ensure that we get the right work->data if we see the
+	 * result of list_add() below, see try_to_grab_pending().
 	 */
-	if (get_wq_data(work) == cwq
-	    && work_pending(work)
-	    && !list_empty(&work->entry)) {
-		work_func_t f = work->func;
-		list_del_init(&work->entry);
-		spin_unlock_irqrestore(&cwq->lock, flags);
-
-		if (!test_bit(WORK_STRUCT_NOAUTOREL, work_data_bits(work)))
-			work_release(work);
-		f(work);
-
-		spin_lock_irqsave(&cwq->lock, flags);
-		cwq->remove_sequence++;
-		wake_up(&cwq->work_done);
-		ret = 1;
-	}
-	spin_unlock_irqrestore(&cwq->lock, flags);
-	return ret;
+	smp_wmb();
+	if (tail)
+		list_add_tail(&work->entry, &cwq->worklist);
+	else
+		list_add(&work->entry, &cwq->worklist);
+	wake_up(&cwq->more_work);
 }
 
-/**
- * run_scheduled_work - run scheduled work synchronously
- * @work: work to run
- *
- * This checks if the work was pending, and runs it
- * synchronously if so. It returns a boolean to indicate
- * whether it had any scheduled work to run or not.
- *
- * NOTE! This _only_ works for normal work_structs. You
- * CANNOT use this for delayed work, because the wq data
- * for delayed work will not point properly to the per-
- * CPU workqueue struct, but will change!
- */
-int fastcall run_scheduled_work(struct work_struct *work)
-{
-	for (;;) {
-		struct cpu_workqueue_struct *cwq;
-
-		if (!work_pending(work))
-			return 0;
-		if (list_empty(&work->entry))
-			return 0;
-		/* NOTE! This depends intimately on __queue_work! */
-		cwq = get_wq_data(work);
-		if (!cwq)
-			return 0;
-		if (__run_work(cwq, work))
-			return 1;
-	}
-}
-EXPORT_SYMBOL(run_scheduled_work);
-
 /* Preempt must be disabled. */
 static void __queue_work(struct cpu_workqueue_struct *cwq,
 			 struct work_struct *work)
@@ -185,10 +139,7 @@
 	unsigned long flags;
 
 	spin_lock_irqsave(&cwq->lock, flags);
-	set_wq_data(work, cwq);
-	list_add_tail(&work->entry, &cwq->worklist);
-	cwq->insert_sequence++;
-	wake_up(&cwq->more_work);
+	insert_work(cwq, work, 1);
 	spin_unlock_irqrestore(&cwq->lock, flags);
 }
 
@@ -204,16 +155,14 @@
  */
 int fastcall queue_work(struct workqueue_struct *wq, struct work_struct *work)
 {
-	int ret = 0, cpu = get_cpu();
+	int ret = 0;
 
 	if (!test_and_set_bit(WORK_STRUCT_PENDING, work_data_bits(work))) {
-		if (unlikely(is_single_threaded(wq)))
-			cpu = singlethread_cpu;
 		BUG_ON(!list_empty(&work->entry));
-		__queue_work(per_cpu_ptr(wq->cpu_wq, cpu), work);
+		__queue_work(wq_per_cpu(wq, get_cpu()), work);
+		put_cpu();
 		ret = 1;
 	}
-	put_cpu();
 	return ret;
 }
 EXPORT_SYMBOL_GPL(queue_work);
@@ -221,13 +170,10 @@
 void delayed_work_timer_fn(unsigned long __data)
 {
 	struct delayed_work *dwork = (struct delayed_work *)__data;
-	struct workqueue_struct *wq = get_wq_data(&dwork->work);
-	int cpu = smp_processor_id();
+	struct cpu_workqueue_struct *cwq = get_wq_data(&dwork->work);
+	struct workqueue_struct *wq = cwq->wq;
 
-	if (unlikely(is_single_threaded(wq)))
-		cpu = singlethread_cpu;
-
-	__queue_work(per_cpu_ptr(wq->cpu_wq, cpu), &dwork->work);
+	__queue_work(wq_per_cpu(wq, smp_processor_id()), &dwork->work);
 }
 
 /**
@@ -241,27 +187,11 @@
 int fastcall queue_delayed_work(struct workqueue_struct *wq,
 			struct delayed_work *dwork, unsigned long delay)
 {
-	int ret = 0;
-	struct timer_list *timer = &dwork->timer;
-	struct work_struct *work = &dwork->work;
-
-	timer_stats_timer_set_start_info(timer);
+	timer_stats_timer_set_start_info(&dwork->timer);
 	if (delay == 0)
-		return queue_work(wq, work);
+		return queue_work(wq, &dwork->work);
 
-	if (!test_and_set_bit(WORK_STRUCT_PENDING, work_data_bits(work))) {
-		BUG_ON(timer_pending(timer));
-		BUG_ON(!list_empty(&work->entry));
-
-		/* This stores wq for the moment, for the timer_fn */
-		set_wq_data(work, wq);
-		timer->expires = jiffies + delay;
-		timer->data = (unsigned long)dwork;
-		timer->function = delayed_work_timer_fn;
-		add_timer(timer);
-		ret = 1;
-	}
-	return ret;
+	return queue_delayed_work_on(-1, wq, dwork, delay);
 }
 EXPORT_SYMBOL_GPL(queue_delayed_work);
 
@@ -285,12 +215,16 @@
 		BUG_ON(timer_pending(timer));
 		BUG_ON(!list_empty(&work->entry));
 
-		/* This stores wq for the moment, for the timer_fn */
-		set_wq_data(work, wq);
+		/* This stores cwq for the moment, for the timer_fn */
+		set_wq_data(work, wq_per_cpu(wq, raw_smp_processor_id()));
 		timer->expires = jiffies + delay;
 		timer->data = (unsigned long)dwork;
 		timer->function = delayed_work_timer_fn;
-		add_timer_on(timer, cpu);
+
+		if (unlikely(cpu >= 0))
+			add_timer_on(timer, cpu);
+		else
+			add_timer(timer);
 		ret = 1;
 	}
 	return ret;
@@ -299,13 +233,7 @@
 
 static void run_workqueue(struct cpu_workqueue_struct *cwq)
 {
-	unsigned long flags;
-
-	/*
-	 * Keep taking off work from the queue until
-	 * done.
-	 */
-	spin_lock_irqsave(&cwq->lock, flags);
+	spin_lock_irq(&cwq->lock);
 	cwq->run_depth++;
 	if (cwq->run_depth > 3) {
 		/* morton gets to eat his hat */
@@ -318,12 +246,12 @@
 						struct work_struct, entry);
 		work_func_t f = work->func;
 
+		cwq->current_work = work;
 		list_del_init(cwq->worklist.next);
-		spin_unlock_irqrestore(&cwq->lock, flags);
+		spin_unlock_irq(&cwq->lock);
 
 		BUG_ON(get_wq_data(work) != cwq);
-		if (!test_bit(WORK_STRUCT_NOAUTOREL, work_data_bits(work)))
-			work_release(work);
+		work_clear_pending(work);
 		f(work);
 
 		if (unlikely(in_atomic() || lockdep_depth(current) > 0)) {
@@ -337,63 +265,81 @@
 			dump_stack();
 		}
 
-		spin_lock_irqsave(&cwq->lock, flags);
-		cwq->remove_sequence++;
-		wake_up(&cwq->work_done);
+		spin_lock_irq(&cwq->lock);
+		cwq->current_work = NULL;
 	}
 	cwq->run_depth--;
-	spin_unlock_irqrestore(&cwq->lock, flags);
+	spin_unlock_irq(&cwq->lock);
+}
+
+/*
+ * NOTE: the caller must not touch *cwq if this func returns true
+ */
+static int cwq_should_stop(struct cpu_workqueue_struct *cwq)
+{
+	int should_stop = cwq->should_stop;
+
+	if (unlikely(should_stop)) {
+		spin_lock_irq(&cwq->lock);
+		should_stop = cwq->should_stop && list_empty(&cwq->worklist);
+		if (should_stop)
+			cwq->thread = NULL;
+		spin_unlock_irq(&cwq->lock);
+	}
+
+	return should_stop;
 }
 
 static int worker_thread(void *__cwq)
 {
 	struct cpu_workqueue_struct *cwq = __cwq;
-	DECLARE_WAITQUEUE(wait, current);
-	struct k_sigaction sa;
-	sigset_t blocked;
+	DEFINE_WAIT(wait);
 
-	if (!cwq->freezeable)
+	if (!cwq->wq->freezeable)
 		current->flags |= PF_NOFREEZE;
 
 	set_user_nice(current, -5);
 
-	/* Block and flush all signals */
-	sigfillset(&blocked);
-	sigprocmask(SIG_BLOCK, &blocked, NULL);
-	flush_signals(current);
-
-	/*
-	 * We inherited MPOL_INTERLEAVE from the booting kernel.
-	 * Set MPOL_DEFAULT to insure node local allocations.
-	 */
-	numa_default_policy();
-
-	/* SIG_IGN makes children autoreap: see do_notify_parent(). */
-	sa.sa.sa_handler = SIG_IGN;
-	sa.sa.sa_flags = 0;
-	siginitset(&sa.sa.sa_mask, sigmask(SIGCHLD));
-	do_sigaction(SIGCHLD, &sa, (struct k_sigaction *)0);
-
-	set_current_state(TASK_INTERRUPTIBLE);
-	while (!kthread_should_stop()) {
-		if (cwq->freezeable)
-			try_to_freeze();
-
-		add_wait_queue(&cwq->more_work, &wait);
-		if (list_empty(&cwq->worklist))
+	for (;;) {
+		prepare_to_wait(&cwq->more_work, &wait, TASK_INTERRUPTIBLE);
+		if (!freezing(current) && !cwq->should_stop
+		    && list_empty(&cwq->worklist))
 			schedule();
-		else
-			__set_current_state(TASK_RUNNING);
-		remove_wait_queue(&cwq->more_work, &wait);
+		finish_wait(&cwq->more_work, &wait);
 
-		if (!list_empty(&cwq->worklist))
-			run_workqueue(cwq);
-		set_current_state(TASK_INTERRUPTIBLE);
+		try_to_freeze();
+
+		if (cwq_should_stop(cwq))
+			break;
+
+		run_workqueue(cwq);
 	}
-	__set_current_state(TASK_RUNNING);
+
 	return 0;
 }
 
+struct wq_barrier {
+	struct work_struct	work;
+	struct completion	done;
+};
+
+static void wq_barrier_func(struct work_struct *work)
+{
+	struct wq_barrier *barr = container_of(work, struct wq_barrier, work);
+	complete(&barr->done);
+}
+
+static void insert_wq_barrier(struct cpu_workqueue_struct *cwq,
+					struct wq_barrier *barr, int tail)
+{
+	INIT_WORK(&barr->work, wq_barrier_func);
+	__set_bit(WORK_STRUCT_PENDING, work_data_bits(&barr->work));
+
+	init_completion(&barr->done);
+
+	insert_work(cwq, &barr->work, tail);
+}
+
 static void flush_cpu_workqueue(struct cpu_workqueue_struct *cwq)
 {
 	if (cwq->thread == current) {
@@ -403,21 +349,18 @@
 		 */
 		run_workqueue(cwq);
 	} else {
-		DEFINE_WAIT(wait);
-		long sequence_needed;
+		struct wq_barrier barr;
+		int active = 0;
 
 		spin_lock_irq(&cwq->lock);
-		sequence_needed = cwq->insert_sequence;
-
-		while (sequence_needed - cwq->remove_sequence > 0) {
-			prepare_to_wait(&cwq->work_done, &wait,
-					TASK_UNINTERRUPTIBLE);
-			spin_unlock_irq(&cwq->lock);
-			schedule();
-			spin_lock_irq(&cwq->lock);
+		if (!list_empty(&cwq->worklist) || cwq->current_work != NULL) {
+			insert_wq_barrier(cwq, &barr, 1);
+			active = 1;
 		}
-		finish_wait(&cwq->work_done, &wait);
 		spin_unlock_irq(&cwq->lock);
+
+		if (active)
+			wait_for_completion(&barr.done);
 	}
 }
 
@@ -428,151 +371,145 @@
  * Forces execution of the workqueue and blocks until its completion.
  * This is typically used in driver shutdown handlers.
  *
- * This function will sample each workqueue's current insert_sequence number and
- * will sleep until the head sequence is greater than or equal to that.  This
- * means that we sleep until all works which were queued on entry have been
- * handled, but we are not livelocked by new incoming ones.
+ * We sleep until all works which were queued on entry have been handled,
+ * but we are not livelocked by new incoming ones.
  *
  * This function used to run the workqueues itself.  Now we just wait for the
  * helper threads to do it.
  */
 void fastcall flush_workqueue(struct workqueue_struct *wq)
 {
+	const cpumask_t *cpu_map = wq_cpu_map(wq);
+	int cpu;
+
 	might_sleep();
-
-	if (is_single_threaded(wq)) {
-		/* Always use first cpu's area. */
-		flush_cpu_workqueue(per_cpu_ptr(wq->cpu_wq, singlethread_cpu));
-	} else {
-		int cpu;
-
-		mutex_lock(&workqueue_mutex);
-		for_each_online_cpu(cpu)
-			flush_cpu_workqueue(per_cpu_ptr(wq->cpu_wq, cpu));
-		mutex_unlock(&workqueue_mutex);
-	}
+	for_each_cpu_mask(cpu, *cpu_map)
+		flush_cpu_workqueue(per_cpu_ptr(wq->cpu_wq, cpu));
 }
 EXPORT_SYMBOL_GPL(flush_workqueue);
 
-static struct task_struct *create_workqueue_thread(struct workqueue_struct *wq,
-						   int cpu, int freezeable)
-{
-	struct cpu_workqueue_struct *cwq = per_cpu_ptr(wq->cpu_wq, cpu);
-	struct task_struct *p;
-
-	spin_lock_init(&cwq->lock);
-	cwq->wq = wq;
-	cwq->thread = NULL;
-	cwq->insert_sequence = 0;
-	cwq->remove_sequence = 0;
-	cwq->freezeable = freezeable;
-	INIT_LIST_HEAD(&cwq->worklist);
-	init_waitqueue_head(&cwq->more_work);
-	init_waitqueue_head(&cwq->work_done);
-
-	if (is_single_threaded(wq))
-		p = kthread_create(worker_thread, cwq, "%s", wq->name);
-	else
-		p = kthread_create(worker_thread, cwq, "%s/%d", wq->name, cpu);
-	if (IS_ERR(p))
-		return NULL;
-	cwq->thread = p;
-	return p;
-}
-
-struct workqueue_struct *__create_workqueue(const char *name,
-					    int singlethread, int freezeable)
-{
-	int cpu, destroy = 0;
-	struct workqueue_struct *wq;
-	struct task_struct *p;
-
-	wq = kzalloc(sizeof(*wq), GFP_KERNEL);
-	if (!wq)
-		return NULL;
-
-	wq->cpu_wq = alloc_percpu(struct cpu_workqueue_struct);
-	if (!wq->cpu_wq) {
-		kfree(wq);
-		return NULL;
-	}
-
-	wq->name = name;
-	mutex_lock(&workqueue_mutex);
-	if (singlethread) {
-		INIT_LIST_HEAD(&wq->list);
-		p = create_workqueue_thread(wq, singlethread_cpu, freezeable);
-		if (!p)
-			destroy = 1;
-		else
-			wake_up_process(p);
-	} else {
-		list_add(&wq->list, &workqueues);
-		for_each_online_cpu(cpu) {
-			p = create_workqueue_thread(wq, cpu, freezeable);
-			if (p) {
-				kthread_bind(p, cpu);
-				wake_up_process(p);
-			} else
-				destroy = 1;
-		}
-	}
-	mutex_unlock(&workqueue_mutex);
-
-	/*
-	 * Was there any error during startup? If yes then clean up:
-	 */
-	if (destroy) {
-		destroy_workqueue(wq);
-		wq = NULL;
-	}
-	return wq;
-}
-EXPORT_SYMBOL_GPL(__create_workqueue);
-
-static void cleanup_workqueue_thread(struct workqueue_struct *wq, int cpu)
+/*
+ * Upon a successful return, the caller "owns" WORK_STRUCT_PENDING bit,
+ * so this work can't be re-armed in any way.
+ */
+static int try_to_grab_pending(struct work_struct *work)
 {
 	struct cpu_workqueue_struct *cwq;
-	unsigned long flags;
-	struct task_struct *p;
+	int ret = 0;
 
-	cwq = per_cpu_ptr(wq->cpu_wq, cpu);
-	spin_lock_irqsave(&cwq->lock, flags);
-	p = cwq->thread;
-	cwq->thread = NULL;
-	spin_unlock_irqrestore(&cwq->lock, flags);
-	if (p)
-		kthread_stop(p);
+	if (!test_and_set_bit(WORK_STRUCT_PENDING, work_data_bits(work)))
+		return 1;
+
+	/*
+	 * The queueing is in progress, or it is already queued. Try to
+	 * steal it from ->worklist without clearing WORK_STRUCT_PENDING.
+	 */
+
+	cwq = get_wq_data(work);
+	if (!cwq)
+		return ret;
+
+	spin_lock_irq(&cwq->lock);
+	if (!list_empty(&work->entry)) {
+		/*
+		 * This work is queued, but perhaps we locked the wrong cwq.
+		 * In that case we must see the new value after rmb(), see
+		 * insert_work()->wmb().
+		 */
+		smp_rmb();
+		if (cwq == get_wq_data(work)) {
+			list_del_init(&work->entry);
+			ret = 1;
+		}
+	}
+	spin_unlock_irq(&cwq->lock);
+
+	return ret;
+}
+
+static void wait_on_cpu_work(struct cpu_workqueue_struct *cwq,
+				struct work_struct *work)
+{
+	struct wq_barrier barr;
+	int running = 0;
+
+	spin_lock_irq(&cwq->lock);
+	if (unlikely(cwq->current_work == work)) {
+		insert_wq_barrier(cwq, &barr, 0);
+		running = 1;
+	}
+	spin_unlock_irq(&cwq->lock);
+
+	if (unlikely(running))
+		wait_for_completion(&barr.done);
+}
+
+static void wait_on_work(struct work_struct *work)
+{
+	struct cpu_workqueue_struct *cwq;
+	struct workqueue_struct *wq;
+	const cpumask_t *cpu_map;
+	int cpu;
+
+	might_sleep();
+
+	cwq = get_wq_data(work);
+	if (!cwq)
+		return;
+
+	wq = cwq->wq;
+	cpu_map = wq_cpu_map(wq);
+
+	for_each_cpu_mask(cpu, *cpu_map)
+		wait_on_cpu_work(per_cpu_ptr(wq->cpu_wq, cpu), work);
 }
 
 /**
- * destroy_workqueue - safely terminate a workqueue
- * @wq: target workqueue
+ * cancel_work_sync - block until a work_struct's callback has terminated
+ * @work: the work which is to be flushed
  *
- * Safely destroy a workqueue. All work currently pending will be done first.
+ * cancel_work_sync() will cancel the work if it is queued. If the work's
+ * callback appears to be running, cancel_work_sync() will block until it
+ * has completed.
+ *
+ * It is possible to use this function if the work re-queues itself. It can
+ * cancel the work even if it migrates to another workqueue, however in that
+ * case it only guarantees that work->func() has completed on the last queued
+ * workqueue.
+ *
+ * cancel_work_sync(&delayed_work->work) should be used only if ->timer is not
+ * pending, otherwise it goes into a busy-wait loop until the timer expires.
+ *
+ * The caller must ensure that workqueue_struct on which this work was last
+ * queued can't be destroyed before this function returns.
  */
-void destroy_workqueue(struct workqueue_struct *wq)
+void cancel_work_sync(struct work_struct *work)
 {
-	int cpu;
-
-	flush_workqueue(wq);
-
-	/* We don't need the distraction of CPUs appearing and vanishing. */
-	mutex_lock(&workqueue_mutex);
-	if (is_single_threaded(wq))
-		cleanup_workqueue_thread(wq, singlethread_cpu);
-	else {
-		for_each_online_cpu(cpu)
-			cleanup_workqueue_thread(wq, cpu);
-		list_del(&wq->list);
-	}
-	mutex_unlock(&workqueue_mutex);
-	free_percpu(wq->cpu_wq);
-	kfree(wq);
+	while (!try_to_grab_pending(work))
+		cpu_relax();
+	wait_on_work(work);
+	work_clear_pending(work);
 }
-EXPORT_SYMBOL_GPL(destroy_workqueue);
+EXPORT_SYMBOL_GPL(cancel_work_sync);
 
-static struct workqueue_struct *keventd_wq;
+/**
+ * cancel_rearming_delayed_work - reliably kill off a delayed work.
+ * @dwork: the delayed work struct
+ *
+ * It is possible to use this function if @dwork rearms itself via queue_work()
+ * or queue_delayed_work(). See also the comment for cancel_work_sync().
+ */
+void cancel_rearming_delayed_work(struct delayed_work *dwork)
+{
+	while (!del_timer(&dwork->timer) &&
+	       !try_to_grab_pending(&dwork->work))
+		cpu_relax();
+	wait_on_work(&dwork->work);
+	work_clear_pending(&dwork->work);
+}
+EXPORT_SYMBOL(cancel_rearming_delayed_work);
+
+static struct workqueue_struct *keventd_wq __read_mostly;
 
 /**
  * schedule_work - put work task in global workqueue
@@ -638,7 +575,7 @@
 	if (!works)
 		return -ENOMEM;
 
-	mutex_lock(&workqueue_mutex);
+	preempt_disable();		/* CPU hotplug */
 	for_each_online_cpu(cpu) {
 		struct work_struct *work = per_cpu_ptr(works, cpu);
 
@@ -646,7 +583,7 @@
 		set_bit(WORK_STRUCT_PENDING, work_data_bits(work));
 		__queue_work(per_cpu_ptr(keventd_wq->cpu_wq, cpu), work);
 	}
-	mutex_unlock(&workqueue_mutex);
+	preempt_enable();
 	flush_workqueue(keventd_wq);
 	free_percpu(works);
 	return 0;
@@ -659,29 +596,6 @@
 EXPORT_SYMBOL(flush_scheduled_work);
 
 /**
- * cancel_rearming_delayed_workqueue - reliably kill off a delayed work whose handler rearms the delayed work.
- * @wq:   the controlling workqueue structure
- * @dwork: the delayed work struct
- */
-void cancel_rearming_delayed_workqueue(struct workqueue_struct *wq,
-				       struct delayed_work *dwork)
-{
-	while (!cancel_delayed_work(dwork))
-		flush_workqueue(wq);
-}
-EXPORT_SYMBOL(cancel_rearming_delayed_workqueue);
-
-/**
- * cancel_rearming_delayed_work - reliably kill off a delayed keventd work whose handler rearms the delayed work.
- * @dwork: the delayed work struct
- */
-void cancel_rearming_delayed_work(struct delayed_work *dwork)
-{
-	cancel_rearming_delayed_workqueue(keventd_wq, dwork);
-}
-EXPORT_SYMBOL(cancel_rearming_delayed_work);
-
-/**
  * execute_in_process_context - reliably execute the routine with user context
  * @fn:		the function to execute
  * @ew:		guaranteed storage for the execute work structure (must
@@ -728,94 +642,209 @@
 
 }
 
-/* Take the work from this (downed) CPU. */
-static void take_over_work(struct workqueue_struct *wq, unsigned int cpu)
+static struct cpu_workqueue_struct *
+init_cpu_workqueue(struct workqueue_struct *wq, int cpu)
 {
 	struct cpu_workqueue_struct *cwq = per_cpu_ptr(wq->cpu_wq, cpu);
-	struct list_head list;
-	struct work_struct *work;
 
-	spin_lock_irq(&cwq->lock);
-	list_replace_init(&cwq->worklist, &list);
+	cwq->wq = wq;
+	spin_lock_init(&cwq->lock);
+	INIT_LIST_HEAD(&cwq->worklist);
+	init_waitqueue_head(&cwq->more_work);
 
-	while (!list_empty(&list)) {
-		printk("Taking work for %s\n", wq->name);
-		work = list_entry(list.next,struct work_struct,entry);
-		list_del(&work->entry);
-		__queue_work(per_cpu_ptr(wq->cpu_wq, smp_processor_id()), work);
-	}
-	spin_unlock_irq(&cwq->lock);
+	return cwq;
 }
 
-/* We're holding the cpucontrol mutex here */
-static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
-				  unsigned long action,
-				  void *hcpu)
+static int create_workqueue_thread(struct cpu_workqueue_struct *cwq, int cpu)
 {
-	unsigned int hotcpu = (unsigned long)hcpu;
+	struct workqueue_struct *wq = cwq->wq;
+	const char *fmt = is_single_threaded(wq) ? "%s" : "%s/%d";
+	struct task_struct *p;
+
+	p = kthread_create(worker_thread, cwq, fmt, wq->name, cpu);
+	/*
+	 * Nobody can add the work_struct to this cwq,
+	 *	if (caller is __create_workqueue)
+	 *		nobody should see this wq
+	 *	else // caller is CPU_UP_PREPARE
+	 *		cpu is not on cpu_online_map
+	 * so we can abort safely.
+	 */
+	if (IS_ERR(p))
+		return PTR_ERR(p);
+
+	cwq->thread = p;
+	cwq->should_stop = 0;
+
+	return 0;
+}
+
+static void start_workqueue_thread(struct cpu_workqueue_struct *cwq, int cpu)
+{
+	struct task_struct *p = cwq->thread;
+
+	if (p != NULL) {
+		if (cpu >= 0)
+			kthread_bind(p, cpu);
+		wake_up_process(p);
+	}
+}
+
+struct workqueue_struct *__create_workqueue(const char *name,
+					    int singlethread, int freezeable)
+{
+	struct workqueue_struct *wq;
+	struct cpu_workqueue_struct *cwq;
+	int err = 0, cpu;
+
+	wq = kzalloc(sizeof(*wq), GFP_KERNEL);
+	if (!wq)
+		return NULL;
+
+	wq->cpu_wq = alloc_percpu(struct cpu_workqueue_struct);
+	if (!wq->cpu_wq) {
+		kfree(wq);
+		return NULL;
+	}
+
+	wq->name = name;
+	wq->singlethread = singlethread;
+	wq->freezeable = freezeable;
+	INIT_LIST_HEAD(&wq->list);
+
+	if (singlethread) {
+		cwq = init_cpu_workqueue(wq, singlethread_cpu);
+		err = create_workqueue_thread(cwq, singlethread_cpu);
+		start_workqueue_thread(cwq, -1);
+	} else {
+		mutex_lock(&workqueue_mutex);
+		list_add(&wq->list, &workqueues);
+
+		for_each_possible_cpu(cpu) {
+			cwq = init_cpu_workqueue(wq, cpu);
+			if (err || !cpu_online(cpu))
+				continue;
+			err = create_workqueue_thread(cwq, cpu);
+			start_workqueue_thread(cwq, cpu);
+		}
+		mutex_unlock(&workqueue_mutex);
+	}
+
+	if (err) {
+		destroy_workqueue(wq);
+		wq = NULL;
+	}
+	return wq;
+}
+EXPORT_SYMBOL_GPL(__create_workqueue);
+
+static void cleanup_workqueue_thread(struct cpu_workqueue_struct *cwq, int cpu)
+{
+	struct wq_barrier barr;
+	int alive = 0;
+
+	spin_lock_irq(&cwq->lock);
+	if (cwq->thread != NULL) {
+		insert_wq_barrier(cwq, &barr, 1);
+		cwq->should_stop = 1;
+		alive = 1;
+	}
+	spin_unlock_irq(&cwq->lock);
+
+	if (alive) {
+		wait_for_completion(&barr.done);
+
+		while (unlikely(cwq->thread != NULL))
+			cpu_relax();
+		/*
+		 * Wait until cwq->thread unlocks cwq->lock,
+		 * it won't touch *cwq after that.
+		 */
+		smp_rmb();
+		spin_unlock_wait(&cwq->lock);
+	}
+}
+
+/**
+ * destroy_workqueue - safely terminate a workqueue
+ * @wq: target workqueue
+ *
+ * Safely destroy a workqueue. All work currently pending will be done first.
+ */
+void destroy_workqueue(struct workqueue_struct *wq)
+{
+	const cpumask_t *cpu_map = wq_cpu_map(wq);
+	struct cpu_workqueue_struct *cwq;
+	int cpu;
+
+	mutex_lock(&workqueue_mutex);
+	list_del(&wq->list);
+	mutex_unlock(&workqueue_mutex);
+
+	for_each_cpu_mask(cpu, *cpu_map) {
+		cwq = per_cpu_ptr(wq->cpu_wq, cpu);
+		cleanup_workqueue_thread(cwq, cpu);
+	}
+
+	free_percpu(wq->cpu_wq);
+	kfree(wq);
+}
+EXPORT_SYMBOL_GPL(destroy_workqueue);
+
+static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
+						unsigned long action,
+						void *hcpu)
+{
+	unsigned int cpu = (unsigned long)hcpu;
+	struct cpu_workqueue_struct *cwq;
 	struct workqueue_struct *wq;
 
+	action &= ~CPU_TASKS_FROZEN;
+
 	switch (action) {
+	case CPU_LOCK_ACQUIRE:
+		mutex_lock(&workqueue_mutex);
+		return NOTIFY_OK;
+
+	case CPU_LOCK_RELEASE:
+		mutex_unlock(&workqueue_mutex);
+		return NOTIFY_OK;
+
 	case CPU_UP_PREPARE:
-		mutex_lock(&workqueue_mutex);
-		/* Create a new workqueue thread for it. */
-		list_for_each_entry(wq, &workqueues, list) {
-			if (!create_workqueue_thread(wq, hotcpu, 0)) {
-				printk("workqueue for %i failed\n", hotcpu);
-				return NOTIFY_BAD;
-			}
+		cpu_set(cpu, cpu_populated_map);
+	}
+
+	list_for_each_entry(wq, &workqueues, list) {
+		cwq = per_cpu_ptr(wq->cpu_wq, cpu);
+
+		switch (action) {
+		case CPU_UP_PREPARE:
+			if (!create_workqueue_thread(cwq, cpu))
+				break;
+			printk(KERN_ERR "workqueue for %i failed\n", cpu);
+			return NOTIFY_BAD;
+
+		case CPU_ONLINE:
+			start_workqueue_thread(cwq, cpu);
+			break;
+
+		case CPU_UP_CANCELED:
+			start_workqueue_thread(cwq, -1);
+		case CPU_DEAD:
+			cleanup_workqueue_thread(cwq, cpu);
+			break;
 		}
-		break;
-
-	case CPU_ONLINE:
-		/* Kick off worker threads. */
-		list_for_each_entry(wq, &workqueues, list) {
-			struct cpu_workqueue_struct *cwq;
-
-			cwq = per_cpu_ptr(wq->cpu_wq, hotcpu);
-			kthread_bind(cwq->thread, hotcpu);
-			wake_up_process(cwq->thread);
-		}
-		mutex_unlock(&workqueue_mutex);
-		break;
-
-	case CPU_UP_CANCELED:
-		list_for_each_entry(wq, &workqueues, list) {
-			if (!per_cpu_ptr(wq->cpu_wq, hotcpu)->thread)
-				continue;
-			/* Unbind so it can run. */
-			kthread_bind(per_cpu_ptr(wq->cpu_wq, hotcpu)->thread,
-				     any_online_cpu(cpu_online_map));
-			cleanup_workqueue_thread(wq, hotcpu);
-		}
-		mutex_unlock(&workqueue_mutex);
-		break;
-
-	case CPU_DOWN_PREPARE:
-		mutex_lock(&workqueue_mutex);
-		break;
-
-	case CPU_DOWN_FAILED:
-		mutex_unlock(&workqueue_mutex);
-		break;
-
-	case CPU_DEAD:
-		list_for_each_entry(wq, &workqueues, list)
-			cleanup_workqueue_thread(wq, hotcpu);
-		list_for_each_entry(wq, &workqueues, list)
-			take_over_work(wq, hotcpu);
-		mutex_unlock(&workqueue_mutex);
-		break;
 	}
 
 	return NOTIFY_OK;
 }
 
-void init_workqueues(void)
+void __init init_workqueues(void)
 {
+	cpu_populated_map = cpu_online_map;
 	singlethread_cpu = first_cpu(cpu_possible_map);
+	cpu_singlethread_map = cpumask_of_cpu(singlethread_cpu);
 	hotcpu_notifier(workqueue_cpu_callback, 0);
 	keventd_wq = create_workqueue("events");
 	BUG_ON(!keventd_wq);
 }
-
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index d69ddbe..402eb4e 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -1004,7 +1004,7 @@
        struct radix_tree_preload *rtp;
 
        /* Free per-cpu pool of perloaded nodes */
-       if (action == CPU_DEAD) {
+       if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) {
                rtp = &per_cpu(radix_tree_preloads, cpu);
                while (rtp->nr) {
                        kmem_cache_free(radix_tree_node_cachep,
diff --git a/mm/filemap.c b/mm/filemap.c
index 9cbf4fe..9e56fd1 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -750,6 +750,7 @@
 	read_unlock_irq(&mapping->tree_lock);
 	return i;
 }
+EXPORT_SYMBOL(find_get_pages_contig);
 
 /**
  * find_get_pages_tag - find and return pages that match @tag
@@ -778,6 +779,7 @@
 	read_unlock_irq(&mapping->tree_lock);
 	return ret;
 }
+EXPORT_SYMBOL(find_get_pages_tag);
 
 /**
  * grab_cache_page_nowait - returns locked page at given index in given cache
diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index cbb3358..1b49dab 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -434,7 +434,6 @@
 	unsigned blocksize;
 	unsigned length;
 	struct page *page;
-	void *kaddr;
 
 	BUG_ON(!mapping->a_ops->get_xip_page);
 
@@ -458,11 +457,7 @@
 		else
 			return PTR_ERR(page);
 	}
-	kaddr = kmap_atomic(page, KM_USER0);
-	memset(kaddr + offset, 0, length);
-	kunmap_atomic(kaddr, KM_USER0);
-
-	flush_dcache_page(page);
+	zero_user_page(page, offset, length, KM_USER0);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(xip_truncate_page);
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 36db012..eb7180d 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -140,6 +140,8 @@
 	return page;
 
 fail:
+	if (vma->vm_flags & VM_MAYSHARE)
+		resv_huge_pages++;
 	spin_unlock(&hugetlb_lock);
 	return NULL;
 }
@@ -172,6 +174,17 @@
 }
 __setup("hugepages=", hugetlb_setup);
 
+static unsigned int cpuset_mems_nr(unsigned int *array)
+{
+	int node;
+	unsigned int nr = 0;
+
+	for_each_node_mask(node, cpuset_current_mems_allowed)
+		nr += array[node];
+
+	return nr;
+}
+
 #ifdef CONFIG_SYSCTL
 static void update_and_free_page(struct page *page)
 {
@@ -817,6 +830,26 @@
 	chg = region_chg(&inode->i_mapping->private_list, from, to);
 	if (chg < 0)
 		return chg;
+	/*
+	 * When cpuset is configured, it breaks the strict hugetlb page
+	 * reservation as the accounting is done on a global variable. Such
+	 * reservation is completely rubbish in the presence of cpuset because
+	 * the reservation is not checked against page availability for the
+	 * current cpuset. Application can still potentially OOM'ed by kernel
+	 * with lack of free htlb page in cpuset that the task is in.
+	 * Attempt to enforce strict accounting with cpuset is almost
+	 * impossible (or too ugly) because cpuset is too fluid that
+	 * task or memory node can be dynamically moved between cpusets.
+	 *
+	 * The change of semantics for shared hugetlb mapping with cpuset is
+	 * undesirable. However, in order to preserve some of the semantics,
+	 * we fall back to check against current free page availability as
+	 * a best attempt and hopefully to minimize the impact of changing
+	 * semantics that cpuset has.
+	 */
+	if (chg > cpuset_mems_nr(free_huge_pages_node))
+		return -ENOMEM;
+
 	ret = hugetlb_acct_memory(chg);
 	if (ret < 0)
 		return ret;
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 6fd0b74..f9b5d6d 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -691,43 +691,26 @@
 
 #ifdef CONFIG_NUMA
 /*
- * Called from the slab reaper to drain pagesets on a particular node that
- * belongs to the currently executing processor.
+ * Called from the vmstat counter updater to drain pagesets of this
+ * currently executing processor on remote nodes after they have
+ * expired.
+ *
  * Note that this function must be called with the thread pinned to
  * a single processor.
  */
-void drain_node_pages(int nodeid)
+void drain_zone_pages(struct zone *zone, struct per_cpu_pages *pcp)
 {
-	int i;
-	enum zone_type z;
 	unsigned long flags;
+	int to_drain;
 
-	for (z = 0; z < MAX_NR_ZONES; z++) {
-		struct zone *zone = NODE_DATA(nodeid)->node_zones + z;
-		struct per_cpu_pageset *pset;
-
-		if (!populated_zone(zone))
-			continue;
-
-		pset = zone_pcp(zone, smp_processor_id());
-		for (i = 0; i < ARRAY_SIZE(pset->pcp); i++) {
-			struct per_cpu_pages *pcp;
-
-			pcp = &pset->pcp[i];
-			if (pcp->count) {
-				int to_drain;
-
-				local_irq_save(flags);
-				if (pcp->count >= pcp->batch)
-					to_drain = pcp->batch;
-				else
-					to_drain = pcp->count;
-				free_pages_bulk(zone, to_drain, &pcp->list, 0);
-				pcp->count -= to_drain;
-				local_irq_restore(flags);
-			}
-		}
-	}
+	local_irq_save(flags);
+	if (pcp->count >= pcp->batch)
+		to_drain = pcp->batch;
+	else
+		to_drain = pcp->count;
+	free_pages_bulk(zone, to_drain, &pcp->list, 0);
+	pcp->count -= to_drain;
+	local_irq_restore(flags);
 }
 #endif
 
@@ -2148,11 +2131,14 @@
 
 	switch (action) {
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		if (process_zones(cpu))
 			ret = NOTIFY_BAD;
 		break;
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		free_zone_pagesets(cpu);
 		break;
 	default:
@@ -3012,7 +2998,7 @@
 {
 	int cpu = (unsigned long)hcpu;
 
-	if (action == CPU_DEAD) {
+	if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) {
 		local_irq_disable();
 		__drain_pages(cpu);
 		vm_events_fold_cpu(cpu);
diff --git a/mm/slab.c b/mm/slab.c
index acda7e2..944b205 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -928,12 +928,6 @@
 {
 	int node = __get_cpu_var(reap_node);
 
-	/*
-	 * Also drain per cpu pages on remote zones
-	 */
-	if (node != numa_node_id())
-		drain_node_pages(node);
-
 	node = next_node(node, node_online_map);
 	if (unlikely(node >= MAX_NUMNODES))
 		node = first_node(node_online_map);
@@ -1186,8 +1180,11 @@
 	int memsize = sizeof(struct kmem_list3);
 
 	switch (action) {
-	case CPU_UP_PREPARE:
+	case CPU_LOCK_ACQUIRE:
 		mutex_lock(&cache_chain_mutex);
+		break;
+	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		/*
 		 * We need to do this right in the beginning since
 		 * alloc_arraycache's are going to use this list.
@@ -1274,17 +1271,28 @@
 		}
 		break;
 	case CPU_ONLINE:
-		mutex_unlock(&cache_chain_mutex);
+	case CPU_ONLINE_FROZEN:
 		start_cpu_timer(cpu);
 		break;
 #ifdef CONFIG_HOTPLUG_CPU
-	case CPU_DOWN_PREPARE:
-		mutex_lock(&cache_chain_mutex);
-		break;
-	case CPU_DOWN_FAILED:
-		mutex_unlock(&cache_chain_mutex);
-		break;
+  	case CPU_DOWN_PREPARE:
+  	case CPU_DOWN_PREPARE_FROZEN:
+		/*
+		 * Shutdown cache reaper. Note that the cache_chain_mutex is
+		 * held so that if cache_reap() is invoked it cannot do
+		 * anything expensive but will only modify reap_work
+		 * and reschedule the timer.
+		*/
+		cancel_rearming_delayed_work(&per_cpu(reap_work, cpu));
+		/* Now the cache_reaper is guaranteed to be not running. */
+		per_cpu(reap_work, cpu).work.func = NULL;
+  		break;
+  	case CPU_DOWN_FAILED:
+  	case CPU_DOWN_FAILED_FROZEN:
+		start_cpu_timer(cpu);
+  		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		/*
 		 * Even if all the cpus of a node are down, we don't free the
 		 * kmem_list3 of any cache. This to avoid a race between
@@ -1296,6 +1304,7 @@
 		/* fall thru */
 #endif
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 		list_for_each_entry(cachep, &cache_chain, next) {
 			struct array_cache *nc;
 			struct array_cache *shared;
@@ -1354,6 +1363,8 @@
 				continue;
 			drain_freelist(cachep, l3, l3->free_objects);
 		}
+		break;
+	case CPU_LOCK_RELEASE:
 		mutex_unlock(&cache_chain_mutex);
 		break;
 	}
@@ -3742,7 +3753,6 @@
 
 /**
  * krealloc - reallocate memory. The contents will remain unchanged.
- *
  * @p: object to reallocate memory for.
  * @new_size: how many bytes of memory are required.
  * @flags: the type of memory to allocate.
@@ -4140,7 +4150,6 @@
 	check_irq_on();
 	mutex_unlock(&cache_chain_mutex);
 	next_reap_node();
-	refresh_cpu_vm_stats(smp_processor_id());
 out:
 	/* Set up the next iteration */
 	schedule_delayed_work(work, round_jiffies_relative(REAPTIMEOUT_CPUC));
diff --git a/mm/slub.c b/mm/slub.c
index 5db3da5..bd2efae 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -66,11 +66,11 @@
  * SLUB assigns one slab for allocation to each processor.
  * Allocations only occur from these slabs called cpu slabs.
  *
- * Slabs with free elements are kept on a partial list.
- * There is no list for full slabs. If an object in a full slab is
+ * Slabs with free elements are kept on a partial list and during regular
+ * operations no list for full slabs is used. If an object in a full slab is
  * freed then the slab will show up again on the partial lists.
- * Otherwise there is no need to track full slabs unless we have to
- * track full slabs for debugging purposes.
+ * We track full slabs for debugging purposes though because otherwise we
+ * cannot scan all objects.
  *
  * Slabs are freed when they become empty. Teardown and setup is
  * minimal so we rely on the page allocators per cpu caches for
@@ -87,13 +87,36 @@
  * 			the fast path.
  */
 
+static inline int SlabDebug(struct page *page)
+{
+#ifdef CONFIG_SLUB_DEBUG
+	return PageError(page);
+#else
+	return 0;
+#endif
+}
+
+static inline void SetSlabDebug(struct page *page)
+{
+#ifdef CONFIG_SLUB_DEBUG
+	SetPageError(page);
+#endif
+}
+
+static inline void ClearSlabDebug(struct page *page)
+{
+#ifdef CONFIG_SLUB_DEBUG
+	ClearPageError(page);
+#endif
+}
+
 /*
  * Issues still to be resolved:
  *
  * - The per cpu array is updated for each new slab and and is a remote
  *   cacheline for most nodes. This could become a bouncing cacheline given
- *   enough frequent updates. There are 16 pointers in a cacheline.so at
- *   max 16 cpus could compete. Likely okay.
+ *   enough frequent updates. There are 16 pointers in a cacheline, so at
+ *   max 16 cpus could compete for the cacheline which may be okay.
  *
  * - Support PAGE_ALLOC_DEBUG. Should be easy to do.
  *
@@ -137,6 +160,7 @@
 
 #define DEBUG_DEFAULT_FLAGS (SLAB_DEBUG_FREE | SLAB_RED_ZONE | \
 				SLAB_POISON | SLAB_STORE_USER)
+
 /*
  * Set of flags that will prevent slab merging
  */
@@ -157,6 +181,11 @@
 /* Internal SLUB flags */
 #define __OBJECT_POISON 0x80000000	/* Poison object */
 
+/* Not all arches define cache_line_size */
+#ifndef cache_line_size
+#define cache_line_size()	L1_CACHE_BYTES
+#endif
+
 static int kmem_size = sizeof(struct kmem_cache);
 
 #ifdef CONFIG_SMP
@@ -166,7 +195,7 @@
 static enum {
 	DOWN,		/* No slab functionality available */
 	PARTIAL,	/* kmem_cache_open() works but kmalloc does not */
-	UP,		/* Everything works */
+	UP,		/* Everything works but does not show up in sysfs */
 	SYSFS		/* Sysfs up */
 } slab_state = DOWN;
 
@@ -174,7 +203,19 @@
 static DECLARE_RWSEM(slub_lock);
 LIST_HEAD(slab_caches);
 
-#ifdef CONFIG_SYSFS
+/*
+ * Tracking user of a slab.
+ */
+struct track {
+	void *addr;		/* Called from address */
+	int cpu;		/* Was running on cpu */
+	int pid;		/* Pid context */
+	unsigned long when;	/* When did the operation occur */
+};
+
+enum track_item { TRACK_ALLOC, TRACK_FREE };
+
+#if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)
 static int sysfs_slab_add(struct kmem_cache *);
 static int sysfs_slab_alias(struct kmem_cache *, const char *);
 static void sysfs_slab_remove(struct kmem_cache *);
@@ -202,6 +243,63 @@
 #endif
 }
 
+static inline int check_valid_pointer(struct kmem_cache *s,
+				struct page *page, const void *object)
+{
+	void *base;
+
+	if (!object)
+		return 1;
+
+	base = page_address(page);
+	if (object < base || object >= base + s->objects * s->size ||
+		(object - base) % s->size) {
+		return 0;
+	}
+
+	return 1;
+}
+
+/*
+ * Slow version of get and set free pointer.
+ *
+ * This version requires touching the cache lines of kmem_cache which
+ * we avoid to do in the fast alloc free paths. There we obtain the offset
+ * from the page struct.
+ */
+static inline void *get_freepointer(struct kmem_cache *s, void *object)
+{
+	return *(void **)(object + s->offset);
+}
+
+static inline void set_freepointer(struct kmem_cache *s, void *object, void *fp)
+{
+	*(void **)(object + s->offset) = fp;
+}
+
+/* Loop over all objects in a slab */
+#define for_each_object(__p, __s, __addr) \
+	for (__p = (__addr); __p < (__addr) + (__s)->objects * (__s)->size;\
+			__p += (__s)->size)
+
+/* Scan freelist */
+#define for_each_free_object(__p, __s, __free) \
+	for (__p = (__free); __p; __p = get_freepointer((__s), __p))
+
+/* Determine object index from a given position */
+static inline int slab_index(void *p, struct kmem_cache *s, void *addr)
+{
+	return (p - addr) / s->size;
+}
+
+#ifdef CONFIG_SLUB_DEBUG
+/*
+ * Debug settings:
+ */
+static int slub_debug;
+
+static char *slub_debug_slabs;
+
 /*
  * Object debugging
  */
@@ -237,35 +335,6 @@
 	}
 }
 
-/*
- * Slow version of get and set free pointer.
- *
- * This requires touching the cache lines of kmem_cache.
- * The offset can also be obtained from the page. In that
- * case it is in the cacheline that we already need to touch.
- */
-static void *get_freepointer(struct kmem_cache *s, void *object)
-{
-	return *(void **)(object + s->offset);
-}
-
-static void set_freepointer(struct kmem_cache *s, void *object, void *fp)
-{
-	*(void **)(object + s->offset) = fp;
-}
-
-/*
- * Tracking user of a slab.
- */
-struct track {
-	void *addr;		/* Called from address */
-	int cpu;		/* Was running on cpu */
-	int pid;		/* Pid context */
-	unsigned long when;	/* When did the operation occur */
-};
-
-enum track_item { TRACK_ALLOC, TRACK_FREE };
-
 static struct track *get_track(struct kmem_cache *s, void *object,
 	enum track_item alloc)
 {
@@ -400,24 +469,6 @@
 	return 1;
 }
 
-
-static int check_valid_pointer(struct kmem_cache *s, struct page *page,
-					 void *object)
-{
-	void *base;
-
-	if (!object)
-		return 1;
-
-	base = page_address(page);
-	if (object < base || object >= base + s->objects * s->size ||
-		(object - base) % s->size) {
-		return 0;
-	}
-
-	return 1;
-}
-
 /*
  * Object layout:
  *
@@ -425,26 +476,34 @@
  * 	Bytes of the object to be managed.
  * 	If the freepointer may overlay the object then the free
  * 	pointer is the first word of the object.
+ *
  * 	Poisoning uses 0x6b (POISON_FREE) and the last byte is
  * 	0xa5 (POISON_END)
  *
  * object + s->objsize
  * 	Padding to reach word boundary. This is also used for Redzoning.
- * 	Padding is extended to word size if Redzoning is enabled
- * 	and objsize == inuse.
+ * 	Padding is extended by another word if Redzoning is enabled and
+ * 	objsize == inuse.
+ *
  * 	We fill with 0xbb (RED_INACTIVE) for inactive objects and with
  * 	0xcc (RED_ACTIVE) for objects in use.
  *
  * object + s->inuse
+ * 	Meta data starts here.
+ *
  * 	A. Free pointer (if we cannot overwrite object on free)
  * 	B. Tracking data for SLAB_STORE_USER
- * 	C. Padding to reach required alignment boundary
- * 		Padding is done using 0x5a (POISON_INUSE)
+ * 	C. Padding to reach required alignment boundary or at mininum
+ * 		one word if debuggin is on to be able to detect writes
+ * 		before the word boundary.
+ *
+ *	Padding is done using 0x5a (POISON_INUSE)
  *
  * object + s->size
+ * 	Nothing is used beyond s->size.
  *
- * If slabcaches are merged then the objsize and inuse boundaries are to
- * be ignored. And therefore no slab options that rely on these boundaries
+ * If slabcaches are merged then the objsize and inuse boundaries are mostly
+ * ignored. And therefore no slab options that rely on these boundaries
  * may be used with merged slabcaches.
  */
 
@@ -570,8 +629,7 @@
 		/*
 		 * No choice but to zap it and thus loose the remainder
 		 * of the free objects in this slab. May cause
-		 * another error because the object count maybe
-		 * wrong now.
+		 * another error because the object count is now wrong.
 		 */
 		set_freepointer(s, p, NULL);
 		return 0;
@@ -611,9 +669,8 @@
 }
 
 /*
- * Determine if a certain object on a page is on the freelist and
- * therefore free. Must hold the slab lock for cpu slabs to
- * guarantee that the chains are consistent.
+ * Determine if a certain object on a page is on the freelist. Must hold the
+ * slab lock to guarantee that the chains are in a consistent state.
  */
 static int on_freelist(struct kmem_cache *s, struct page *page, void *search)
 {
@@ -659,7 +716,7 @@
 }
 
 /*
- * Tracking of fully allocated slabs for debugging
+ * Tracking of fully allocated slabs for debugging purposes.
  */
 static void add_full(struct kmem_cache_node *n, struct page *page)
 {
@@ -710,7 +767,7 @@
 		/*
 		 * If this is a slab page then lets do the best we can
 		 * to avoid issues in the future. Marking all objects
-		 * as used avoids touching the remainder.
+		 * as used avoids touching the remaining objects.
 		 */
 		printk(KERN_ERR "@@@ SLUB: %s slab 0x%p. Marking all objects used.\n",
 			s->name, page);
@@ -764,6 +821,113 @@
 	return 0;
 }
 
+static void trace(struct kmem_cache *s, struct page *page, void *object, int alloc)
+{
+	if (s->flags & SLAB_TRACE) {
+		printk(KERN_INFO "TRACE %s %s 0x%p inuse=%d fp=0x%p\n",
+			s->name,
+			alloc ? "alloc" : "free",
+			object, page->inuse,
+			page->freelist);
+
+		if (!alloc)
+			print_section("Object", (void *)object, s->objsize);
+
+		dump_stack();
+	}
+}
+
+static int __init setup_slub_debug(char *str)
+{
+	if (!str || *str != '=')
+		slub_debug = DEBUG_DEFAULT_FLAGS;
+	else {
+		str++;
+		if (*str == 0 || *str == ',')
+			slub_debug = DEBUG_DEFAULT_FLAGS;
+		else
+		for( ;*str && *str != ','; str++)
+			switch (*str) {
+			case 'f' : case 'F' :
+				slub_debug |= SLAB_DEBUG_FREE;
+				break;
+			case 'z' : case 'Z' :
+				slub_debug |= SLAB_RED_ZONE;
+				break;
+			case 'p' : case 'P' :
+				slub_debug |= SLAB_POISON;
+				break;
+			case 'u' : case 'U' :
+				slub_debug |= SLAB_STORE_USER;
+				break;
+			case 't' : case 'T' :
+				slub_debug |= SLAB_TRACE;
+				break;
+			default:
+				printk(KERN_ERR "slub_debug option '%c' "
+					"unknown. skipped\n",*str);
+			}
+	}
+
+	if (*str == ',')
+		slub_debug_slabs = str + 1;
+	return 1;
+}
+
+__setup("slub_debug", setup_slub_debug);
+
+static void kmem_cache_open_debug_check(struct kmem_cache *s)
+{
+	/*
+	 * The page->offset field is only 16 bit wide. This is an offset
+	 * in units of words from the beginning of an object. If the slab
+	 * size is bigger then we cannot move the free pointer behind the
+	 * object anymore.
+	 *
+	 * On 32 bit platforms the limit is 256k. On 64bit platforms
+	 * the limit is 512k.
+	 *
+	 * Debugging or ctor/dtors may create a need to move the free
+	 * pointer. Fail if this happens.
+	 */
+	if (s->size >= 65535 * sizeof(void *)) {
+		BUG_ON(s->flags & (SLAB_RED_ZONE | SLAB_POISON |
+				SLAB_STORE_USER | SLAB_DESTROY_BY_RCU));
+		BUG_ON(s->ctor || s->dtor);
+	}
+	else
+		/*
+		 * Enable debugging if selected on the kernel commandline.
+		 */
+		if (slub_debug && (!slub_debug_slabs ||
+		    strncmp(slub_debug_slabs, s->name,
+		    	strlen(slub_debug_slabs)) == 0))
+				s->flags |= slub_debug;
+}
+#else
+
+static inline int alloc_object_checks(struct kmem_cache *s,
+		struct page *page, void *object) { return 0; }
+
+static inline int free_object_checks(struct kmem_cache *s,
+		struct page *page, void *object) { return 0; }
+
+static inline void add_full(struct kmem_cache_node *n, struct page *page) {}
+static inline void remove_full(struct kmem_cache *s, struct page *page) {}
+static inline void trace(struct kmem_cache *s, struct page *page,
+			void *object, int alloc) {}
+static inline void init_object(struct kmem_cache *s,
+			void *object, int active) {}
+static inline void init_tracking(struct kmem_cache *s, void *object) {}
+static inline int slab_pad_check(struct kmem_cache *s, struct page *page)
+			{ return 1; }
+static inline int check_object(struct kmem_cache *s, struct page *page,
+			void *object, int active) { return 1; }
+static inline void set_track(struct kmem_cache *s, void *object,
+			enum track_item alloc, void *addr) {}
+static inline void kmem_cache_open_debug_check(struct kmem_cache *s) {}
+#define slub_debug 0
+#endif
 /*
  * Slab allocation and freeing
  */
@@ -797,7 +961,7 @@
 static void setup_object(struct kmem_cache *s, struct page *page,
 				void *object)
 {
-	if (PageError(page)) {
+	if (SlabDebug(page)) {
 		init_object(s, object, 0);
 		init_tracking(s, object);
 	}
@@ -832,7 +996,7 @@
 	page->flags |= 1 << PG_slab;
 	if (s->flags & (SLAB_DEBUG_FREE | SLAB_RED_ZONE | SLAB_POISON |
 			SLAB_STORE_USER | SLAB_TRACE))
-		page->flags |= 1 << PG_error;
+		SetSlabDebug(page);
 
 	start = page_address(page);
 	end = start + s->objects * s->size;
@@ -841,7 +1005,7 @@
 		memset(start, POISON_INUSE, PAGE_SIZE << s->order);
 
 	last = start;
-	for (p = start + s->size; p < end; p += s->size) {
+	for_each_object(p, s, start) {
 		setup_object(s, page, last);
 		set_freepointer(s, last, p);
 		last = p;
@@ -861,13 +1025,11 @@
 {
 	int pages = 1 << s->order;
 
-	if (unlikely(PageError(page) || s->dtor)) {
-		void *start = page_address(page);
-		void *end = start + (pages << PAGE_SHIFT);
+	if (unlikely(SlabDebug(page) || s->dtor)) {
 		void *p;
 
 		slab_pad_check(s, page);
-		for (p = start; p <= end - s->size; p += s->size) {
+		for_each_object(p, s, page_address(page)) {
 			if (s->dtor)
 				s->dtor(p, s, 0);
 			check_object(s, page, p, 0);
@@ -910,7 +1072,8 @@
 
 	atomic_long_dec(&n->nr_slabs);
 	reset_page_mapcount(page);
-	page->flags &= ~(1 << PG_slab | 1 << PG_error);
+	ClearSlabDebug(page);
+	__ClearPageSlab(page);
 	free_slab(s, page);
 }
 
@@ -966,9 +1129,9 @@
 }
 
 /*
- * Lock page and remove it from the partial list
+ * Lock slab and remove from the partial list.
  *
- * Must hold list_lock
+ * Must hold list_lock.
  */
 static int lock_and_del_slab(struct kmem_cache_node *n, struct page *page)
 {
@@ -981,7 +1144,7 @@
 }
 
 /*
- * Try to get a partial slab from a specific node
+ * Try to allocate a partial slab from a specific node.
  */
 static struct page *get_partial_node(struct kmem_cache_node *n)
 {
@@ -990,7 +1153,8 @@
 	/*
 	 * Racy check. If we mistakenly see no partial slabs then we
 	 * just allocate an empty slab. If we mistakenly try to get a
-	 * partial slab then get_partials() will return NULL.
+	 * partial slab and there is none available then get_partials()
+	 * will return NULL.
 	 */
 	if (!n || !n->nr_partial)
 		return NULL;
@@ -1006,8 +1170,7 @@
 }
 
 /*
- * Get a page from somewhere. Search in increasing NUMA
- * distances.
+ * Get a page from somewhere. Search in increasing NUMA distances.
  */
 static struct page *get_any_partial(struct kmem_cache *s, gfp_t flags)
 {
@@ -1017,24 +1180,22 @@
 	struct page *page;
 
 	/*
-	 * The defrag ratio allows to configure the tradeoffs between
-	 * inter node defragmentation and node local allocations.
-	 * A lower defrag_ratio increases the tendency to do local
-	 * allocations instead of scanning throught the partial
-	 * lists on other nodes.
+	 * The defrag ratio allows a configuration of the tradeoffs between
+	 * inter node defragmentation and node local allocations. A lower
+	 * defrag_ratio increases the tendency to do local allocations
+	 * instead of attempting to obtain partial slabs from other nodes.
 	 *
-	 * If defrag_ratio is set to 0 then kmalloc() always
-	 * returns node local objects. If its higher then kmalloc()
-	 * may return off node objects in order to avoid fragmentation.
-	 *
-	 * A higher ratio means slabs may be taken from other nodes
-	 * thus reducing the number of partial slabs on those nodes.
+	 * If the defrag_ratio is set to 0 then kmalloc() always
+	 * returns node local objects. If the ratio is higher then kmalloc()
+	 * may return off node objects because partial slabs are obtained
+	 * from other nodes and filled up.
 	 *
 	 * If /sys/slab/xx/defrag_ratio is set to 100 (which makes
-	 * defrag_ratio = 1000) then every (well almost) allocation
-	 * will first attempt to defrag slab caches on other nodes. This
-	 * means scanning over all nodes to look for partial slabs which
-	 * may be a bit expensive to do on every slab allocation.
+	 * defrag_ratio = 1000) then every (well almost) allocation will
+	 * first attempt to defrag slab caches on other nodes. This means
+	 * scanning over all nodes to look for partial slabs which may be
+	 * expensive if we do it every time we are trying to find a slab
+	 * with available objects.
 	 */
 	if (!s->defrag_ratio || get_cycles() % 1024 > s->defrag_ratio)
 		return NULL;
@@ -1087,18 +1248,19 @@
 
 		if (page->freelist)
 			add_partial(n, page);
-		else if (PageError(page) && (s->flags & SLAB_STORE_USER))
+		else if (SlabDebug(page) && (s->flags & SLAB_STORE_USER))
 			add_full(n, page);
 		slab_unlock(page);
 
 	} else {
 		if (n->nr_partial < MIN_PARTIAL) {
 			/*
-			 * Adding an empty page to the partial slabs in order
-			 * to avoid page allocator overhead. This page needs to
-			 * come after all the others that are not fully empty
-			 * in order to make sure that we do maximum
-			 * defragmentation.
+			 * Adding an empty slab to the partial slabs in order
+			 * to avoid page allocator overhead. This slab needs
+			 * to come after the other slabs with objects in
+			 * order to fill them up. That way the size of the
+			 * partial list stays small. kmem_cache_shrink can
+			 * reclaim empty slabs from the partial list.
 			 */
 			add_partial_tail(n, page);
 			slab_unlock(page);
@@ -1166,11 +1328,11 @@
  * 1. The page struct
  * 2. The first cacheline of the object to be allocated.
  *
- * The only cache lines that are read (apart from code) is the
+ * The only other cache lines that are read (apart from code) is the
  * per cpu array in the kmem_cache struct.
  *
  * Fastpath is not possible if we need to get a new slab or have
- * debugging enabled (which means all slabs are marked with PageError)
+ * debugging enabled (which means all slabs are marked with SlabDebug)
  */
 static void *slab_alloc(struct kmem_cache *s,
 				gfp_t gfpflags, int node, void *addr)
@@ -1193,7 +1355,7 @@
 	object = page->freelist;
 	if (unlikely(!object))
 		goto another_slab;
-	if (unlikely(PageError(page)))
+	if (unlikely(SlabDebug(page)))
 		goto debug;
 
 have_object:
@@ -1220,9 +1382,11 @@
 		cpu = smp_processor_id();
 		if (s->cpu_slab[cpu]) {
 			/*
-			 * Someone else populated the cpu_slab while we enabled
-			 * interrupts, or we have got scheduled on another cpu.
-			 * The page may not be on the requested node.
+			 * Someone else populated the cpu_slab while we
+			 * enabled interrupts, or we have gotten scheduled
+			 * on another cpu. The page may not be on the
+			 * requested node even if __GFP_THISNODE was
+			 * specified. So we need to recheck.
 			 */
 			if (node == -1 ||
 				page_to_nid(s->cpu_slab[cpu]) == node) {
@@ -1235,7 +1399,7 @@
 				slab_lock(page);
 				goto redo;
 			}
-			/* Dump the current slab */
+			/* New slab does not fit our expectations */
 			flush_slab(s, s->cpu_slab[cpu], cpu);
 		}
 		slab_lock(page);
@@ -1248,12 +1412,7 @@
 		goto another_slab;
 	if (s->flags & SLAB_STORE_USER)
 		set_track(s, object, TRACK_ALLOC, addr);
-	if (s->flags & SLAB_TRACE) {
-		printk(KERN_INFO "TRACE %s alloc 0x%p inuse=%d fp=0x%p\n",
-			s->name, object, page->inuse,
-			page->freelist);
-		dump_stack();
-	}
+	trace(s, page, object, 1);
 	init_object(s, object, 1);
 	goto have_object;
 }
@@ -1276,7 +1435,8 @@
  * The fastpath only writes the cacheline of the page struct and the first
  * cacheline of the object.
  *
- * No special cachelines need to be read
+ * We read the cpu_slab cacheline to check if the slab is the per cpu
+ * slab for this processor.
  */
 static void slab_free(struct kmem_cache *s, struct page *page,
 					void *x, void *addr)
@@ -1288,7 +1448,7 @@
 	local_irq_save(flags);
 	slab_lock(page);
 
-	if (unlikely(PageError(page)))
+	if (unlikely(SlabDebug(page)))
 		goto debug;
 checks_ok:
 	prior = object[page->offset] = page->freelist;
@@ -1321,7 +1481,7 @@
 slab_empty:
 	if (prior)
 		/*
-		 * Slab on the partial list.
+		 * Slab still on the partial list.
 		 */
 		remove_partial(s, page);
 
@@ -1337,13 +1497,7 @@
 		remove_full(s, page);
 	if (s->flags & SLAB_STORE_USER)
 		set_track(s, x, TRACK_FREE, addr);
-	if (s->flags & SLAB_TRACE) {
-		printk(KERN_INFO "TRACE %s free 0x%p inuse=%d fp=0x%p\n",
-			s->name, object, page->inuse,
-			page->freelist);
-		print_section("Object", (void *)object, s->objsize);
-		dump_stack();
-	}
+	trace(s, page, object, 0);
 	init_object(s, object, 0);
 	goto checks_ok;
 }
@@ -1370,22 +1524,16 @@
 }
 
 /*
- * kmem_cache_open produces objects aligned at "size" and the first object
- * is placed at offset 0 in the slab (We have no metainformation on the
- * slab, all slabs are in essence "off slab").
- *
- * In order to get the desired alignment one just needs to align the
- * size.
+ * Object placement in a slab is made very easy because we always start at
+ * offset 0. If we tune the size of the object to the alignment then we can
+ * get the required alignment by putting one properly sized object after
+ * another.
  *
  * Notice that the allocation order determines the sizes of the per cpu
  * caches. Each processor has always one slab available for allocations.
  * Increasing the allocation order reduces the number of times that slabs
- * must be moved on and off the partial lists and therefore may influence
+ * must be moved on and off the partial lists and is therefore a factor in
  * locking overhead.
- *
- * The offset is used to relocate the free list link in each object. It is
- * therefore possible to move the free list link behind the object. This
- * is necessary for RCU to work properly and also useful for debugging.
  */
 
 /*
@@ -1396,76 +1544,110 @@
  */
 static int slub_min_order;
 static int slub_max_order = DEFAULT_MAX_ORDER;
-
-/*
- * Minimum number of objects per slab. This is necessary in order to
- * reduce locking overhead. Similar to the queue size in SLAB.
- */
 static int slub_min_objects = DEFAULT_MIN_OBJECTS;
 
 /*
  * Merge control. If this is set then no merging of slab caches will occur.
+ * (Could be removed. This was introduced to pacify the merge skeptics.)
  */
 static int slub_nomerge;
 
 /*
- * Debug settings:
- */
-static int slub_debug;
-
-static char *slub_debug_slabs;
-
-/*
  * Calculate the order of allocation given an slab object size.
  *
- * The order of allocation has significant impact on other elements
- * of the system. Generally order 0 allocations should be preferred
- * since they do not cause fragmentation in the page allocator. Larger
- * objects may have problems with order 0 because there may be too much
- * space left unused in a slab. We go to a higher order if more than 1/8th
- * of the slab would be wasted.
+ * The order of allocation has significant impact on performance and other
+ * system components. Generally order 0 allocations should be preferred since
+ * order 0 does not cause fragmentation in the page allocator. Larger objects
+ * be problematic to put into order 0 slabs because there may be too much
+ * unused space left. We go to a higher order if more than 1/8th of the slab
+ * would be wasted.
  *
- * In order to reach satisfactory performance we must ensure that
- * a minimum number of objects is in one slab. Otherwise we may
- * generate too much activity on the partial lists. This is less a
- * concern for large slabs though. slub_max_order specifies the order
- * where we begin to stop considering the number of objects in a slab.
+ * In order to reach satisfactory performance we must ensure that a minimum
+ * number of objects is in one slab. Otherwise we may generate too much
+ * activity on the partial lists which requires taking the list_lock. This is
+ * less a concern for large slabs though which are rarely used.
  *
- * Higher order allocations also allow the placement of more objects
- * in a slab and thereby reduce object handling overhead. If the user
- * has requested a higher mininum order then we start with that one
- * instead of zero.
+ * slub_max_order specifies the order where we begin to stop considering the
+ * number of objects in a slab as critical. If we reach slub_max_order then
+ * we try to keep the page order as low as possible. So we accept more waste
+ * of space in favor of a small page order.
+ *
+ * Higher order allocations also allow the placement of more objects in a
+ * slab and thereby reduce object handling overhead. If the user has
+ * requested a higher mininum order then we start with that one instead of
+ * the smallest order which will fit the object.
  */
-static int calculate_order(int size)
+static inline int slab_order(int size, int min_objects,
+				int max_order, int fract_leftover)
 {
 	int order;
 	int rem;
 
-	for (order = max(slub_min_order, fls(size - 1) - PAGE_SHIFT);
-			order < MAX_ORDER; order++) {
+	for (order = max(slub_min_order,
+				fls(min_objects * size - 1) - PAGE_SHIFT);
+			order <= max_order; order++) {
+
 		unsigned long slab_size = PAGE_SIZE << order;
 
-		if (slub_max_order > order &&
-				slab_size < slub_min_objects * size)
-			continue;
-
-		if (slab_size < size)
+		if (slab_size < min_objects * size)
 			continue;
 
 		rem = slab_size % size;
 
-		if (rem <= (PAGE_SIZE << order) / 8)
+		if (rem <= slab_size / fract_leftover)
 			break;
 
 	}
-	if (order >= MAX_ORDER)
-		return -E2BIG;
+
 	return order;
 }
 
+static inline int calculate_order(int size)
+{
+	int order;
+	int min_objects;
+	int fraction;
+
+	/*
+	 * Attempt to find best configuration for a slab. This
+	 * works by first attempting to generate a layout with
+	 * the best configuration and backing off gradually.
+	 *
+	 * First we reduce the acceptable waste in a slab. Then
+	 * we reduce the minimum objects required in a slab.
+	 */
+	min_objects = slub_min_objects;
+	while (min_objects > 1) {
+		fraction = 8;
+		while (fraction >= 4) {
+			order = slab_order(size, min_objects,
+						slub_max_order, fraction);
+			if (order <= slub_max_order)
+				return order;
+			fraction /= 2;
+		}
+		min_objects /= 2;
+	}
+
+	/*
+	 * We were unable to place multiple objects in a slab. Now
+	 * lets see if we can place a single object there.
+	 */
+	order = slab_order(size, 1, slub_max_order, 1);
+	if (order <= slub_max_order)
+		return order;
+
+	/*
+	 * Doh this slab cannot be placed using slub_max_order.
+	 */
+	order = slab_order(size, 1, MAX_ORDER, 1);
+	if (order <= MAX_ORDER)
+		return order;
+	return -ENOSYS;
+}
+
 /*
- * Function to figure out which alignment to use from the
- * various ways of specifying it.
+ * Figure out what the alignment of the objects will be.
  */
 static unsigned long calculate_alignment(unsigned long flags,
 		unsigned long align, unsigned long size)
@@ -1480,8 +1662,8 @@
 	 * then use it.
 	 */
 	if ((flags & SLAB_HWCACHE_ALIGN) &&
-			size > L1_CACHE_BYTES / 2)
-		return max_t(unsigned long, align, L1_CACHE_BYTES);
+			size > cache_line_size() / 2)
+		return max_t(unsigned long, align, cache_line_size());
 
 	if (align < ARCH_SLAB_MINALIGN)
 		return ARCH_SLAB_MINALIGN;
@@ -1619,22 +1801,23 @@
 	 */
 	size = ALIGN(size, sizeof(void *));
 
+#ifdef CONFIG_SLUB_DEBUG
 	/*
-	 * If we are redzoning then check if there is some space between the
+	 * If we are Redzoning then check if there is some space between the
 	 * end of the object and the free pointer. If not then add an
-	 * additional word, so that we can establish a redzone between
-	 * the object and the freepointer to be able to check for overwrites.
+	 * additional word to have some bytes to store Redzone information.
 	 */
 	if ((flags & SLAB_RED_ZONE) && size == s->objsize)
 		size += sizeof(void *);
+#endif
 
 	/*
-	 * With that we have determined how much of the slab is in actual
-	 * use by the object. This is the potential offset to the free
-	 * pointer.
+	 * With that we have determined the number of bytes in actual use
+	 * by the object. This is the potential offset to the free pointer.
 	 */
 	s->inuse = size;
 
+#ifdef CONFIG_SLUB_DEBUG
 	if (((flags & (SLAB_DESTROY_BY_RCU | SLAB_POISON)) ||
 		s->ctor || s->dtor)) {
 		/*
@@ -1656,7 +1839,7 @@
 		 */
 		size += 2 * sizeof(struct track);
 
-	if (flags & DEBUG_DEFAULT_FLAGS)
+	if (flags & SLAB_RED_ZONE)
 		/*
 		 * Add some empty padding so that we can catch
 		 * overwrites from earlier objects rather than let
@@ -1665,10 +1848,12 @@
 		 * of the object.
 		 */
 		size += sizeof(void *);
+#endif
+
 	/*
 	 * Determine the alignment based on various parameters that the
-	 * user specified (this is unecessarily complex due to the attempt
-	 * to be compatible with SLAB. Should be cleaned up some day).
+	 * user specified and the dynamic determination of cache line size
+	 * on bootup.
 	 */
 	align = calculate_alignment(flags, align, s->objsize);
 
@@ -1700,23 +1885,6 @@
 
 }
 
-static int __init finish_bootstrap(void)
-{
-	struct list_head *h;
-	int err;
-
-	slab_state = SYSFS;
-
-	list_for_each(h, &slab_caches) {
-		struct kmem_cache *s =
-			container_of(h, struct kmem_cache, list);
-
-		err = sysfs_slab_add(s);
-		BUG_ON(err);
-	}
-	return 0;
-}
-
 static int kmem_cache_open(struct kmem_cache *s, gfp_t gfpflags,
 		const char *name, size_t size,
 		size_t align, unsigned long flags,
@@ -1730,32 +1898,7 @@
 	s->objsize = size;
 	s->flags = flags;
 	s->align = align;
-
-	/*
-	 * The page->offset field is only 16 bit wide. This is an offset
-	 * in units of words from the beginning of an object. If the slab
-	 * size is bigger then we cannot move the free pointer behind the
-	 * object anymore.
-	 *
-	 * On 32 bit platforms the limit is 256k. On 64bit platforms
-	 * the limit is 512k.
-	 *
-	 * Debugging or ctor/dtors may create a need to move the free
-	 * pointer. Fail if this happens.
-	 */
-	if (s->size >= 65535 * sizeof(void *)) {
-		BUG_ON(flags & (SLAB_RED_ZONE | SLAB_POISON |
-				SLAB_STORE_USER | SLAB_DESTROY_BY_RCU));
-		BUG_ON(ctor || dtor);
-	}
-	else
-		/*
-		 * Enable debugging if selected on the kernel commandline.
-		 */
-		if (slub_debug && (!slub_debug_slabs ||
-		    strncmp(slub_debug_slabs, name,
-		    	strlen(slub_debug_slabs)) == 0))
-				s->flags |= slub_debug;
+	kmem_cache_open_debug_check(s);
 
 	if (!calculate_sizes(s))
 		goto error;
@@ -1783,7 +1926,6 @@
 int kmem_ptr_validate(struct kmem_cache *s, const void *object)
 {
 	struct page * page;
-	void *addr;
 
 	page = get_object_page(object);
 
@@ -1791,13 +1933,7 @@
 		/* No slab or wrong slab */
 		return 0;
 
-	addr = page_address(page);
-	if (object < addr || object >= addr + s->objects * s->size)
-		/* Out of bounds */
-		return 0;
-
-	if ((object - addr) % s->size)
-		/* Improperly aligned */
+	if (!check_valid_pointer(s, page, object))
 		return 0;
 
 	/*
@@ -1826,7 +1962,8 @@
 EXPORT_SYMBOL(kmem_cache_name);
 
 /*
- * Attempt to free all slabs on a node
+ * Attempt to free all slabs on a node. Return the number of slabs we
+ * were unable to free.
  */
 static int free_list(struct kmem_cache *s, struct kmem_cache_node *n,
 			struct list_head *list)
@@ -1847,7 +1984,7 @@
 }
 
 /*
- * Release all resources used by slab cache
+ * Release all resources used by a slab cache.
  */
 static int kmem_cache_close(struct kmem_cache *s)
 {
@@ -1932,45 +2069,6 @@
 
 __setup("slub_nomerge", setup_slub_nomerge);
 
-static int __init setup_slub_debug(char *str)
-{
-	if (!str || *str != '=')
-		slub_debug = DEBUG_DEFAULT_FLAGS;
-	else {
-		str++;
-		if (*str == 0 || *str == ',')
-			slub_debug = DEBUG_DEFAULT_FLAGS;
-		else
-		for( ;*str && *str != ','; str++)
-			switch (*str) {
-			case 'f' : case 'F' :
-				slub_debug |= SLAB_DEBUG_FREE;
-				break;
-			case 'z' : case 'Z' :
-				slub_debug |= SLAB_RED_ZONE;
-				break;
-			case 'p' : case 'P' :
-				slub_debug |= SLAB_POISON;
-				break;
-			case 'u' : case 'U' :
-				slub_debug |= SLAB_STORE_USER;
-				break;
-			case 't' : case 'T' :
-				slub_debug |= SLAB_TRACE;
-				break;
-			default:
-				printk(KERN_ERR "slub_debug option '%c' "
-					"unknown. skipped\n",*str);
-			}
-	}
-
-	if (*str == ',')
-		slub_debug_slabs = str + 1;
-	return 1;
-}
-
-__setup("slub_debug", setup_slub_debug);
-
 static struct kmem_cache *create_kmalloc_cache(struct kmem_cache *s,
 		const char *name, int size, gfp_t gfp_flags)
 {
@@ -2108,13 +2206,14 @@
 EXPORT_SYMBOL(kfree);
 
 /*
- *  kmem_cache_shrink removes empty slabs from the partial lists
- *  and then sorts the partially allocated slabs by the number
- *  of items in use. The slabs with the most items in use
- *  come first. New allocations will remove these from the
- *  partial list because they are full. The slabs with the
- *  least items are placed last. If it happens that the objects
- *  are freed then the page can be returned to the page allocator.
+ * kmem_cache_shrink removes empty slabs from the partial lists and sorts
+ * the remaining slabs by the number of items in use. The slabs with the
+ * most items in use come first. New allocations will then fill those up
+ * and thus they can be removed from the partial lists.
+ *
+ * The slabs with the least items are placed last. This results in them
+ * being allocated from last increasing the chance that the last objects
+ * are freed in them.
  */
 int kmem_cache_shrink(struct kmem_cache *s)
 {
@@ -2143,12 +2242,10 @@
 		spin_lock_irqsave(&n->list_lock, flags);
 
 		/*
-		 * Build lists indexed by the items in use in
-		 * each slab or free slabs if empty.
+		 * Build lists indexed by the items in use in each slab.
 		 *
-		 * Note that concurrent frees may occur while
-		 * we hold the list_lock. page->inuse here is
-		 * the upper limit.
+		 * Note that concurrent frees may occur while we hold the
+		 * list_lock. page->inuse here is the upper limit.
 		 */
 		list_for_each_entry_safe(page, t, &n->partial, lru) {
 			if (!page->inuse && slab_trylock(page)) {
@@ -2172,8 +2269,8 @@
 			goto out;
 
 		/*
-		 * Rebuild the partial list with the slabs filled up
-		 * most first and the least used slabs at the end.
+		 * Rebuild the partial list with the slabs filled up most
+		 * first and the least used slabs at the end.
 		 */
 		for (i = s->objects - 1; i >= 0; i--)
 			list_splice(slabs_by_inuse + i, n->partial.prev);
@@ -2189,7 +2286,6 @@
 
 /**
  * krealloc - reallocate memory. The contents will remain unchanged.
- *
  * @p: object to reallocate memory for.
  * @new_size: how many bytes of memory are required.
  * @flags: the type of memory to allocate.
@@ -2201,9 +2297,8 @@
  */
 void *krealloc(const void *p, size_t new_size, gfp_t flags)
 {
-	struct kmem_cache *new_cache;
 	void *ret;
-	struct page *page;
+	size_t ks;
 
 	if (unlikely(!p))
 		return kmalloc(new_size, flags);
@@ -2213,19 +2308,13 @@
 		return NULL;
 	}
 
-	page = virt_to_head_page(p);
-
-	new_cache = get_slab(new_size, flags);
-
-	/*
- 	 * If new size fits in the current cache, bail out.
- 	 */
-	if (likely(page->slab == new_cache))
+	ks = ksize(p);
+	if (ks >= new_size)
 		return (void *)p;
 
 	ret = kmalloc(new_size, flags);
 	if (ret) {
-		memcpy(ret, p, min(new_size, ksize(p)));
+		memcpy(ret, p, min(new_size, ks));
 		kfree(p);
 	}
 	return ret;
@@ -2243,7 +2332,7 @@
 #ifdef CONFIG_NUMA
 	/*
 	 * Must first have the slab cache available for the allocations of the
-	 * struct kmalloc_cache_node's. There is special bootstrap code in
+	 * struct kmem_cache_node's. There is special bootstrap code in
 	 * kmem_cache_open for slab_state == DOWN.
 	 */
 	create_kmalloc_cache(&kmalloc_caches[0], "kmem_cache_node",
@@ -2280,7 +2369,7 @@
 
 	printk(KERN_INFO "SLUB: Genslabs=%d, HWalign=%d, Order=%d-%d, MinObjects=%d,"
 		" Processors=%d, Nodes=%d\n",
-		KMALLOC_SHIFT_HIGH, L1_CACHE_BYTES,
+		KMALLOC_SHIFT_HIGH, cache_line_size(),
 		slub_min_order, slub_max_order, slub_min_objects,
 		nr_cpu_ids, nr_node_ids);
 }
@@ -2415,8 +2504,8 @@
 }
 
 /*
- * Use the cpu notifier to insure that the slab are flushed
- * when necessary.
+ * Use the cpu notifier to insure that the cpu slabs are flushed when
+ * necessary.
  */
 static int __cpuinit slab_cpuup_callback(struct notifier_block *nfb,
 		unsigned long action, void *hcpu)
@@ -2425,7 +2514,9 @@
 
 	switch (action) {
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		for_all_slabs(__flush_cpu_slab, cpu);
 		break;
 	default:
@@ -2439,94 +2530,122 @@
 
 #endif
 
-#ifdef CONFIG_NUMA
-
-/*****************************************************************
- * Generic reaper used to support the page allocator
- * (the cpu slabs are reaped by a per slab workqueue).
- *
- * Maybe move this to the page allocator?
- ****************************************************************/
-
-static DEFINE_PER_CPU(unsigned long, reap_node);
-
-static void init_reap_node(int cpu)
+void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, void *caller)
 {
-	int node;
+	struct kmem_cache *s = get_slab(size, gfpflags);
 
-	node = next_node(cpu_to_node(cpu), node_online_map);
-	if (node == MAX_NUMNODES)
-		node = first_node(node_online_map);
+	if (!s)
+		return NULL;
 
-	__get_cpu_var(reap_node) = node;
+	return slab_alloc(s, gfpflags, -1, caller);
 }
 
-static void next_reap_node(void)
+void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
+					int node, void *caller)
 {
-	int node = __get_cpu_var(reap_node);
+	struct kmem_cache *s = get_slab(size, gfpflags);
 
-	/*
-	 * Also drain per cpu pages on remote zones
-	 */
-	if (node != numa_node_id())
-		drain_node_pages(node);
+	if (!s)
+		return NULL;
 
-	node = next_node(node, node_online_map);
-	if (unlikely(node >= MAX_NUMNODES))
-		node = first_node(node_online_map);
-	__get_cpu_var(reap_node) = node;
-}
-#else
-#define init_reap_node(cpu) do { } while (0)
-#define next_reap_node(void) do { } while (0)
-#endif
-
-#define REAPTIMEOUT_CPUC	(2*HZ)
-
-#ifdef CONFIG_SMP
-static DEFINE_PER_CPU(struct delayed_work, reap_work);
-
-static void cache_reap(struct work_struct *unused)
-{
-	next_reap_node();
-	refresh_cpu_vm_stats(smp_processor_id());
-	schedule_delayed_work(&__get_cpu_var(reap_work),
-				      REAPTIMEOUT_CPUC);
+	return slab_alloc(s, gfpflags, node, caller);
 }
 
-static void __devinit start_cpu_timer(int cpu)
+#if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)
+static int validate_slab(struct kmem_cache *s, struct page *page)
 {
-	struct delayed_work *reap_work = &per_cpu(reap_work, cpu);
+	void *p;
+	void *addr = page_address(page);
+	DECLARE_BITMAP(map, s->objects);
 
-	/*
-	 * When this gets called from do_initcalls via cpucache_init(),
-	 * init_workqueues() has already run, so keventd will be setup
-	 * at that time.
-	 */
-	if (keventd_up() && reap_work->work.func == NULL) {
-		init_reap_node(cpu);
-		INIT_DELAYED_WORK(reap_work, cache_reap);
-		schedule_delayed_work_on(cpu, reap_work, HZ + 3 * cpu);
+	if (!check_slab(s, page) ||
+			!on_freelist(s, page, NULL))
+		return 0;
+
+	/* Now we know that a valid freelist exists */
+	bitmap_zero(map, s->objects);
+
+	for_each_free_object(p, s, page->freelist) {
+		set_bit(slab_index(p, s, addr), map);
+		if (!check_object(s, page, p, 0))
+			return 0;
+	}
+
+	for_each_object(p, s, addr)
+		if (!test_bit(slab_index(p, s, addr), map))
+			if (!check_object(s, page, p, 1))
+				return 0;
+	return 1;
+}
+
+static void validate_slab_slab(struct kmem_cache *s, struct page *page)
+{
+	if (slab_trylock(page)) {
+		validate_slab(s, page);
+		slab_unlock(page);
+	} else
+		printk(KERN_INFO "SLUB %s: Skipped busy slab 0x%p\n",
+			s->name, page);
+
+	if (s->flags & DEBUG_DEFAULT_FLAGS) {
+		if (!SlabDebug(page))
+			printk(KERN_ERR "SLUB %s: SlabDebug not set "
+				"on slab 0x%p\n", s->name, page);
+	} else {
+		if (SlabDebug(page))
+			printk(KERN_ERR "SLUB %s: SlabDebug set on "
+				"slab 0x%p\n", s->name, page);
 	}
 }
 
-static int __init cpucache_init(void)
+static int validate_slab_node(struct kmem_cache *s, struct kmem_cache_node *n)
 {
-	int cpu;
+	unsigned long count = 0;
+	struct page *page;
+	unsigned long flags;
 
-	/*
-	 * Register the timers that drain pcp pages and update vm statistics
-	 */
-	for_each_online_cpu(cpu)
-		start_cpu_timer(cpu);
-	return 0;
+	spin_lock_irqsave(&n->list_lock, flags);
+
+	list_for_each_entry(page, &n->partial, lru) {
+		validate_slab_slab(s, page);
+		count++;
+	}
+	if (count != n->nr_partial)
+		printk(KERN_ERR "SLUB %s: %ld partial slabs counted but "
+			"counter=%ld\n", s->name, count, n->nr_partial);
+
+	if (!(s->flags & SLAB_STORE_USER))
+		goto out;
+
+	list_for_each_entry(page, &n->full, lru) {
+		validate_slab_slab(s, page);
+		count++;
+	}
+	if (count != atomic_long_read(&n->nr_slabs))
+		printk(KERN_ERR "SLUB: %s %ld slabs counted but "
+			"counter=%ld\n", s->name, count,
+			atomic_long_read(&n->nr_slabs));
+
+out:
+	spin_unlock_irqrestore(&n->list_lock, flags);
+	return count;
 }
-__initcall(cpucache_init);
-#endif
+
+static unsigned long validate_slab_cache(struct kmem_cache *s)
+{
+	int node;
+	unsigned long count = 0;
+
+	flush_all(s);
+	for_each_online_node(node) {
+		struct kmem_cache_node *n = get_node(s, node);
+
+		count += validate_slab_node(s, n);
+	}
+	return count;
+}
 
 #ifdef SLUB_RESILIENCY_TEST
-static unsigned long validate_slab_cache(struct kmem_cache *s);
-
 static void resiliency_test(void)
 {
 	u8 *p;
@@ -2582,134 +2701,20 @@
 #endif
 
 /*
- * These are not as efficient as kmalloc for the non debug case.
- * We do not have the page struct available so we have to touch one
- * cacheline in struct kmem_cache to check slab flags.
- */
-void *__kmalloc_track_caller(size_t size, gfp_t gfpflags, void *caller)
-{
-	struct kmem_cache *s = get_slab(size, gfpflags);
-
-	if (!s)
-		return NULL;
-
-	return slab_alloc(s, gfpflags, -1, caller);
-}
-
-void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
-					int node, void *caller)
-{
-	struct kmem_cache *s = get_slab(size, gfpflags);
-
-	if (!s)
-		return NULL;
-
-	return slab_alloc(s, gfpflags, node, caller);
-}
-
-#ifdef CONFIG_SYSFS
-
-static int validate_slab(struct kmem_cache *s, struct page *page)
-{
-	void *p;
-	void *addr = page_address(page);
-	unsigned long map[BITS_TO_LONGS(s->objects)];
-
-	if (!check_slab(s, page) ||
-			!on_freelist(s, page, NULL))
-		return 0;
-
-	/* Now we know that a valid freelist exists */
-	bitmap_zero(map, s->objects);
-
-	for(p = page->freelist; p; p = get_freepointer(s, p)) {
-		set_bit((p - addr) / s->size, map);
-		if (!check_object(s, page, p, 0))
-			return 0;
-	}
-
-	for(p = addr; p < addr + s->objects * s->size; p += s->size)
-		if (!test_bit((p - addr) / s->size, map))
-			if (!check_object(s, page, p, 1))
-				return 0;
-	return 1;
-}
-
-static void validate_slab_slab(struct kmem_cache *s, struct page *page)
-{
-	if (slab_trylock(page)) {
-		validate_slab(s, page);
-		slab_unlock(page);
-	} else
-		printk(KERN_INFO "SLUB %s: Skipped busy slab 0x%p\n",
-			s->name, page);
-
-	if (s->flags & DEBUG_DEFAULT_FLAGS) {
-		if (!PageError(page))
-			printk(KERN_ERR "SLUB %s: PageError not set "
-				"on slab 0x%p\n", s->name, page);
-	} else {
-		if (PageError(page))
-			printk(KERN_ERR "SLUB %s: PageError set on "
-				"slab 0x%p\n", s->name, page);
-	}
-}
-
-static int validate_slab_node(struct kmem_cache *s, struct kmem_cache_node *n)
-{
-	unsigned long count = 0;
-	struct page *page;
-	unsigned long flags;
-
-	spin_lock_irqsave(&n->list_lock, flags);
-
-	list_for_each_entry(page, &n->partial, lru) {
-		validate_slab_slab(s, page);
-		count++;
-	}
-	if (count != n->nr_partial)
-		printk(KERN_ERR "SLUB %s: %ld partial slabs counted but "
-			"counter=%ld\n", s->name, count, n->nr_partial);
-
-	if (!(s->flags & SLAB_STORE_USER))
-		goto out;
-
-	list_for_each_entry(page, &n->full, lru) {
-		validate_slab_slab(s, page);
-		count++;
-	}
-	if (count != atomic_long_read(&n->nr_slabs))
-		printk(KERN_ERR "SLUB: %s %ld slabs counted but "
-			"counter=%ld\n", s->name, count,
-			atomic_long_read(&n->nr_slabs));
-
-out:
-	spin_unlock_irqrestore(&n->list_lock, flags);
-	return count;
-}
-
-static unsigned long validate_slab_cache(struct kmem_cache *s)
-{
-	int node;
-	unsigned long count = 0;
-
-	flush_all(s);
-	for_each_online_node(node) {
-		struct kmem_cache_node *n = get_node(s, node);
-
-		count += validate_slab_node(s, n);
-	}
-	return count;
-}
-
-/*
- * Generate lists of locations where slabcache objects are allocated
+ * Generate lists of code addresses where slabcache objects are allocated
  * and freed.
  */
 
 struct location {
 	unsigned long count;
 	void *addr;
+	long long sum_time;
+	long min_time;
+	long max_time;
+	long min_pid;
+	long max_pid;
+	cpumask_t cpus;
+	nodemask_t nodes;
 };
 
 struct loc_track {
@@ -2750,11 +2755,12 @@
 }
 
 static int add_location(struct loc_track *t, struct kmem_cache *s,
-						void *addr)
+				const struct track *track)
 {
 	long start, end, pos;
 	struct location *l;
 	void *caddr;
+	unsigned long age = jiffies - track->when;
 
 	start = -1;
 	end = t->count;
@@ -2770,19 +2776,36 @@
 			break;
 
 		caddr = t->loc[pos].addr;
-		if (addr == caddr) {
-			t->loc[pos].count++;
+		if (track->addr == caddr) {
+
+			l = &t->loc[pos];
+			l->count++;
+			if (track->when) {
+				l->sum_time += age;
+				if (age < l->min_time)
+					l->min_time = age;
+				if (age > l->max_time)
+					l->max_time = age;
+
+				if (track->pid < l->min_pid)
+					l->min_pid = track->pid;
+				if (track->pid > l->max_pid)
+					l->max_pid = track->pid;
+
+				cpu_set(track->cpu, l->cpus);
+			}
+			node_set(page_to_nid(virt_to_page(track)), l->nodes);
 			return 1;
 		}
 
-		if (addr < caddr)
+		if (track->addr < caddr)
 			end = pos;
 		else
 			start = pos;
 	}
 
 	/*
-	 * Not found. Insert new tracking element
+	 * Not found. Insert new tracking element.
 	 */
 	if (t->count >= t->max && !alloc_loc_track(t, 2 * t->max))
 		return 0;
@@ -2793,7 +2816,16 @@
 			(t->count - pos) * sizeof(struct location));
 	t->count++;
 	l->count = 1;
-	l->addr = addr;
+	l->addr = track->addr;
+	l->sum_time = age;
+	l->min_time = age;
+	l->max_time = age;
+	l->min_pid = track->pid;
+	l->max_pid = track->pid;
+	cpus_clear(l->cpus);
+	cpu_set(track->cpu, l->cpus);
+	nodes_clear(l->nodes);
+	node_set(page_to_nid(virt_to_page(track)), l->nodes);
 	return 1;
 }
 
@@ -2801,19 +2833,16 @@
 		struct page *page, enum track_item alloc)
 {
 	void *addr = page_address(page);
-	unsigned long map[BITS_TO_LONGS(s->objects)];
+	DECLARE_BITMAP(map, s->objects);
 	void *p;
 
 	bitmap_zero(map, s->objects);
-	for (p = page->freelist; p; p = get_freepointer(s, p))
-		set_bit((p - addr) / s->size, map);
+	for_each_free_object(p, s, page->freelist)
+		set_bit(slab_index(p, s, addr), map);
 
-	for (p = addr; p < addr + s->objects * s->size; p += s->size)
-		if (!test_bit((p - addr) / s->size, map)) {
-			void *addr = get_track(s, p, alloc)->addr;
-
-			add_location(t, s, addr);
-		}
+	for_each_object(p, s, addr)
+		if (!test_bit(slab_index(p, s, addr), map))
+			add_location(t, s, get_track(s, p, alloc));
 }
 
 static int list_locations(struct kmem_cache *s, char *buf,
@@ -2847,15 +2876,47 @@
 	}
 
 	for (i = 0; i < t.count; i++) {
-		void *addr = t.loc[i].addr;
+		struct location *l = &t.loc[i];
 
 		if (n > PAGE_SIZE - 100)
 			break;
-		n += sprintf(buf + n, "%7ld ", t.loc[i].count);
-		if (addr)
-			n += sprint_symbol(buf + n, (unsigned long)t.loc[i].addr);
+		n += sprintf(buf + n, "%7ld ", l->count);
+
+		if (l->addr)
+			n += sprint_symbol(buf + n, (unsigned long)l->addr);
 		else
 			n += sprintf(buf + n, "<not-available>");
+
+		if (l->sum_time != l->min_time) {
+			unsigned long remainder;
+
+			n += sprintf(buf + n, " age=%ld/%ld/%ld",
+			l->min_time,
+			div_long_long_rem(l->sum_time, l->count, &remainder),
+			l->max_time);
+		} else
+			n += sprintf(buf + n, " age=%ld",
+				l->min_time);
+
+		if (l->min_pid != l->max_pid)
+			n += sprintf(buf + n, " pid=%ld-%ld",
+				l->min_pid, l->max_pid);
+		else
+			n += sprintf(buf + n, " pid=%ld",
+				l->min_pid);
+
+		if (num_online_cpus() > 1 && !cpus_empty(l->cpus)) {
+			n += sprintf(buf + n, " cpus=");
+			n += cpulist_scnprintf(buf + n, PAGE_SIZE - n - 50,
+					l->cpus);
+		}
+
+		if (num_online_nodes() > 1 && !nodes_empty(l->nodes)) {
+			n += sprintf(buf + n, " nodes=");
+			n += nodelist_scnprintf(buf + n, PAGE_SIZE - n - 50,
+					l->nodes);
+		}
+
 		n += sprintf(buf + n, "\n");
 	}
 
@@ -3491,6 +3552,7 @@
 
 static int __init slab_sysfs_init(void)
 {
+	struct list_head *h;
 	int err;
 
 	err = subsystem_register(&slab_subsys);
@@ -3499,7 +3561,15 @@
 		return -ENOSYS;
 	}
 
-	finish_bootstrap();
+	slab_state = SYSFS;
+
+	list_for_each(h, &slab_caches) {
+		struct kmem_cache *s =
+			container_of(h, struct kmem_cache, list);
+
+		err = sysfs_slab_add(s);
+		BUG_ON(err);
+	}
 
 	while (alias_list) {
 		struct saved_alias *al = alias_list;
@@ -3515,6 +3585,4 @@
 }
 
 __initcall(slab_sysfs_init);
-#else
-__initcall(finish_bootstrap);
 #endif
diff --git a/mm/swap.c b/mm/swap.c
index 218c52a..d3cb966 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -488,7 +488,7 @@
 	long *committed;
 
 	committed = &per_cpu(committed_space, (long)hcpu);
-	if (action == CPU_DEAD) {
+	if (action == CPU_DEAD || action == CPU_DEAD_FROZEN) {
 		atomic_add(*committed, &vm_committed_space);
 		*committed = 0;
 		__lru_add_drain((long)hcpu);
diff --git a/mm/truncate.c b/mm/truncate.c
index 0f4b6d1..4fbe1a2 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -12,6 +12,7 @@
 #include <linux/swap.h>
 #include <linux/module.h>
 #include <linux/pagemap.h>
+#include <linux/highmem.h>
 #include <linux/pagevec.h>
 #include <linux/task_io_accounting_ops.h>
 #include <linux/buffer_head.h>	/* grr. try_to_release_page,
@@ -46,7 +47,7 @@
 
 static inline void truncate_partial_page(struct page *page, unsigned partial)
 {
-	memclear_highpage_flush(page, partial, PAGE_CACHE_SIZE-partial);
+	zero_user_page(page, partial, PAGE_CACHE_SIZE - partial, KM_USER0);
 	if (PagePrivate(page))
 		do_invalidatepage(page, partial);
 }
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 1c8e75a1..1be5a63 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1528,7 +1528,7 @@
 	pg_data_t *pgdat;
 	cpumask_t mask;
 
-	if (action == CPU_ONLINE) {
+	if (action == CPU_ONLINE || action == CPU_ONLINE_FROZEN) {
 		for_each_online_pgdat(pgdat) {
 			mask = node_to_cpumask(pgdat->node_id);
 			if (any_online_cpu(mask) != NR_CPUS)
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 6c488d6..9832d9a 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -281,6 +281,17 @@
 
 /*
  * Update the zone counters for one cpu.
+ *
+ * Note that refresh_cpu_vm_stats strives to only access
+ * node local memory. The per cpu pagesets on remote zones are placed
+ * in the memory local to the processor using that pageset. So the
+ * loop over all zones will access a series of cachelines local to
+ * the processor.
+ *
+ * The call to zone_page_state_add updates the cachelines with the
+ * statistics in the remote zone struct as well as the global cachelines
+ * with the global counters. These could cause remote node cache line
+ * bouncing and will have to be only done when necessary.
  */
 void refresh_cpu_vm_stats(int cpu)
 {
@@ -289,21 +300,54 @@
 	unsigned long flags;
 
 	for_each_zone(zone) {
-		struct per_cpu_pageset *pcp;
+		struct per_cpu_pageset *p;
 
 		if (!populated_zone(zone))
 			continue;
 
-		pcp = zone_pcp(zone, cpu);
+		p = zone_pcp(zone, cpu);
 
 		for (i = 0; i < NR_VM_ZONE_STAT_ITEMS; i++)
-			if (pcp->vm_stat_diff[i]) {
+			if (p->vm_stat_diff[i]) {
 				local_irq_save(flags);
-				zone_page_state_add(pcp->vm_stat_diff[i],
+				zone_page_state_add(p->vm_stat_diff[i],
 					zone, i);
-				pcp->vm_stat_diff[i] = 0;
+				p->vm_stat_diff[i] = 0;
+#ifdef CONFIG_NUMA
+				/* 3 seconds idle till flush */
+				p->expire = 3;
+#endif
 				local_irq_restore(flags);
 			}
+#ifdef CONFIG_NUMA
+		/*
+		 * Deal with draining the remote pageset of this
+		 * processor
+		 *
+		 * Check if there are pages remaining in this pageset
+		 * if not then there is nothing to expire.
+		 */
+		if (!p->expire || (!p->pcp[0].count && !p->pcp[1].count))
+			continue;
+
+		/*
+		 * We never drain zones local to this processor.
+		 */
+		if (zone_to_nid(zone) == numa_node_id()) {
+			p->expire = 0;
+			continue;
+		}
+
+		p->expire--;
+		if (p->expire)
+			continue;
+
+		if (p->pcp[0].count)
+			drain_zone_pages(zone, p->pcp + 0);
+
+		if (p->pcp[1].count)
+			drain_zone_pages(zone, p->pcp + 1);
+#endif
 	}
 }
 
@@ -640,6 +684,24 @@
 #endif /* CONFIG_PROC_FS */
 
 #ifdef CONFIG_SMP
+static DEFINE_PER_CPU(struct delayed_work, vmstat_work);
+int sysctl_stat_interval __read_mostly = HZ;
+
+static void vmstat_update(struct work_struct *w)
+{
+	refresh_cpu_vm_stats(smp_processor_id());
+	schedule_delayed_work(&__get_cpu_var(vmstat_work),
+		sysctl_stat_interval);
+}
+
+static void __devinit start_cpu_timer(int cpu)
+{
+	struct delayed_work *vmstat_work = &per_cpu(vmstat_work, cpu);
+
+	INIT_DELAYED_WORK(vmstat_work, vmstat_update);
+	schedule_delayed_work_on(cpu, vmstat_work, HZ + cpu);
+}
+
 /*
  * Use the cpu notifier to insure that the thresholds are recalculated
  * when necessary.
@@ -648,10 +710,24 @@
 		unsigned long action,
 		void *hcpu)
 {
+	long cpu = (long)hcpu;
+
 	switch (action) {
-	case CPU_UP_PREPARE:
-	case CPU_UP_CANCELED:
+	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
+		start_cpu_timer(cpu);
+		break;
+	case CPU_DOWN_PREPARE:
+	case CPU_DOWN_PREPARE_FROZEN:
+		cancel_rearming_delayed_work(&per_cpu(vmstat_work, cpu));
+		per_cpu(vmstat_work, cpu).work.func = NULL;
+		break;
+	case CPU_DOWN_FAILED:
+	case CPU_DOWN_FAILED_FROZEN:
+		start_cpu_timer(cpu);
+		break;
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		refresh_zone_stat_thresholds();
 		break;
 	default:
@@ -665,8 +741,13 @@
 
 int __init setup_vmstat(void)
 {
+	int cpu;
+
 	refresh_zone_stat_thresholds();
 	register_cpu_notifier(&vmstat_notifier);
+
+	for_each_online_cpu(cpu)
+		start_cpu_timer(cpu);
 	return 0;
 }
 module_init(setup_vmstat)
diff --git a/net/core/dev.c b/net/core/dev.c
index 4317c1b..8301e2a 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3450,7 +3450,7 @@
 	unsigned int cpu, oldcpu = (unsigned long)ocpu;
 	struct softnet_data *sd, *oldsd;
 
-	if (action != CPU_DEAD)
+	if (action != CPU_DEAD && action != CPU_DEAD_FROZEN)
 		return NOTIFY_OK;
 
 	local_irq_disable();
diff --git a/net/core/flow.c b/net/core/flow.c
index 5d25697..0514305 100644
--- a/net/core/flow.c
+++ b/net/core/flow.c
@@ -338,7 +338,7 @@
 			  unsigned long action,
 			  void *hcpu)
 {
-	if (action == CPU_DEAD)
+	if (action == CPU_DEAD || action == CPU_DEAD_FROZEN)
 		__flow_cache_shrink((unsigned long)hcpu, 0);
 	return NOTIFY_OK;
 }
diff --git a/net/ipv4/ipvs/ip_vs_ctl.c b/net/ipv4/ipvs/ip_vs_ctl.c
index b3050a6..68fe1d4 100644
--- a/net/ipv4/ipvs/ip_vs_ctl.c
+++ b/net/ipv4/ipvs/ip_vs_ctl.c
@@ -2387,6 +2387,7 @@
 	EnterFunction(2);
 	ip_vs_trash_cleanup();
 	cancel_rearming_delayed_work(&defense_work);
+	cancel_work_sync(&defense_work.work);
 	ip_vs_kill_estimator(&ip_vs_stats);
 	unregister_sysctl_table(sysctl_header);
 	proc_net_remove("ip_vs_stats");
diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c
index fb3faf7..b733306 100644
--- a/net/iucv/iucv.c
+++ b/net/iucv/iucv.c
@@ -556,6 +556,7 @@
 
 	switch (action) {
 	case CPU_UP_PREPARE:
+	case CPU_UP_PREPARE_FROZEN:
 		if (!percpu_populate(iucv_irq_data,
 				     sizeof(struct iucv_irq_data),
 				     GFP_KERNEL|GFP_DMA, cpu))
@@ -567,15 +568,20 @@
 		}
 		break;
 	case CPU_UP_CANCELED:
+	case CPU_UP_CANCELED_FROZEN:
 	case CPU_DEAD:
+	case CPU_DEAD_FROZEN:
 		percpu_depopulate(iucv_param, cpu);
 		percpu_depopulate(iucv_irq_data, cpu);
 		break;
 	case CPU_ONLINE:
+	case CPU_ONLINE_FROZEN:
 	case CPU_DOWN_FAILED:
+	case CPU_DOWN_FAILED_FROZEN:
 		smp_call_function_on(iucv_declare_cpu, NULL, 0, 1, cpu);
 		break;
 	case CPU_DOWN_PREPARE:
+	case CPU_DOWN_PREPARE_FROZEN:
 		cpumask = iucv_buffer_cpumask;
 		cpu_clear(cpu, cpumask);
 		if (cpus_empty(cpumask))
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index db298b5..099a983 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -924,6 +924,7 @@
 gss_write_init_verf(struct svc_rqst *rqstp, struct rsi *rsip)
 {
 	struct rsc *rsci;
+	int        rc;
 
 	if (rsip->major_status != GSS_S_COMPLETE)
 		return gss_write_null_verf(rqstp);
@@ -932,7 +933,9 @@
 		rsip->major_status = GSS_S_NO_CONTEXT;
 		return gss_write_null_verf(rqstp);
 	}
-	return gss_write_verf(rqstp, rsci->mechctx, GSS_SEQ_WIN);
+	rc = gss_write_verf(rqstp, rsci->mechctx, GSS_SEQ_WIN);
+	cache_put(&rsci->h, &rsc_cache);
+	return rc;
 }
 
 /*
@@ -1089,6 +1092,8 @@
 		}
 		goto complete;
 	case RPC_GSS_PROC_DESTROY:
+		if (gss_write_verf(rqstp, rsci->mechctx, gc->gc_seq))
+			goto auth_err;
 		set_bit(CACHE_NEGATIVE, &rsci->h.flags);
 		if (resv->iov_len + 4 > PAGE_SIZE)
 			goto drop;
@@ -1196,13 +1201,7 @@
 	if (xdr_buf_subsegment(resbuf, &integ_buf, integ_offset,
 				integ_len))
 		BUG();
-	if (resbuf->page_len == 0
-			&& resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE
-			< PAGE_SIZE) {
-		BUG_ON(resbuf->tail[0].iov_len);
-		/* Use head for everything */
-		resv = &resbuf->head[0];
-	} else if (resbuf->tail[0].iov_base == NULL) {
+	if (resbuf->tail[0].iov_base == NULL) {
 		if (resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE > PAGE_SIZE)
 			goto out_err;
 		resbuf->tail[0].iov_base = resbuf->head[0].iov_base
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index ad39b47..a2f1893 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -845,6 +845,8 @@
 
 int register_rpc_pipefs(void)
 {
+	int err;
+
 	rpc_inode_cachep = kmem_cache_create("rpc_inode_cache",
 				sizeof(struct rpc_inode),
 				0, (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
@@ -852,7 +854,12 @@
 				init_once, NULL);
 	if (!rpc_inode_cachep)
 		return -ENOMEM;
-	register_filesystem(&rpc_pipe_fs_type);
+	err = register_filesystem(&rpc_pipe_fs_type);
+	if (err) {
+		kmem_cache_destroy(rpc_inode_cachep);
+		return err;
+	}
+
 	return 0;
 }
 
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index 43ecf62..0d35bc7 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -146,9 +146,11 @@
 	int err = register_rpc_pipefs();
 	if (err)
 		goto out;
-	err = rpc_init_mempool() != 0;
-	if (err)
+	err = rpc_init_mempool();
+	if (err) {
+		unregister_rpc_pipefs();
 		goto out;
+	}
 #ifdef RPC_DEBUG
 	rpc_register_sysctl();
 #endif
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index b7503c1..e673ef9 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -907,7 +907,7 @@
 	 * better idea of reply size
 	 */
 	if (procp->pc_xdrressize)
-		svc_reserve(rqstp, procp->pc_xdrressize<<2);
+		svc_reserve_auth(rqstp, procp->pc_xdrressize<<2);
 
 	/* Call the function that processes the request. */
 	if (!versp->vs_dispatch) {
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index 2bd23ea..07dcd20 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -385,7 +385,7 @@
 {
 	struct ip_map *ipm;
 	struct svc_sock *svsk = rqstp->rq_sock;
-	spin_lock_bh(&svsk->sk_defer_lock);
+	spin_lock(&svsk->sk_lock);
 	ipm = svsk->sk_info_authunix;
 	if (ipm != NULL) {
 		if (!cache_valid(&ipm->h)) {
@@ -395,13 +395,13 @@
 			 * same IP address.
 			 */
 			svsk->sk_info_authunix = NULL;
-			spin_unlock_bh(&svsk->sk_defer_lock);
+			spin_unlock(&svsk->sk_lock);
 			cache_put(&ipm->h, &ip_map_cache);
 			return NULL;
 		}
 		cache_get(&ipm->h);
 	}
-	spin_unlock_bh(&svsk->sk_defer_lock);
+	spin_unlock(&svsk->sk_lock);
 	return ipm;
 }
 
@@ -410,14 +410,14 @@
 {
 	struct svc_sock *svsk = rqstp->rq_sock;
 
-	spin_lock_bh(&svsk->sk_defer_lock);
+	spin_lock(&svsk->sk_lock);
 	if (svsk->sk_sock->type == SOCK_STREAM &&
 	    svsk->sk_info_authunix == NULL) {
 		/* newly cached, keep the reference */
 		svsk->sk_info_authunix = ipm;
 		ipm = NULL;
 	}
-	spin_unlock_bh(&svsk->sk_defer_lock);
+	spin_unlock(&svsk->sk_lock);
 	if (ipm)
 		cache_put(&ipm->h, &ip_map_cache);
 }
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c
index 22f61ae..5baf48d 100644
--- a/net/sunrpc/svcsock.c
+++ b/net/sunrpc/svcsock.c
@@ -53,7 +53,8 @@
  * 	svc_serv->sv_lock protects sv_tempsocks, sv_permsocks, sv_tmpcnt.
  *	when both need to be taken (rare), svc_serv->sv_lock is first.
  *	BKL protects svc_serv->sv_nrthread.
- *	svc_sock->sk_defer_lock protects the svc_sock->sk_deferred list
+ *	svc_sock->sk_lock protects the svc_sock->sk_deferred list
+ *             and the ->sk_info_authunix cache.
  *	svc_sock->sk_flags.SK_BUSY prevents a svc_sock being enqueued multiply.
  *
  *	Some flags can be set to certain values at any time
@@ -787,15 +788,20 @@
 	}
 
 	clear_bit(SK_DATA, &svsk->sk_flags);
-	while ((err = kernel_recvmsg(svsk->sk_sock, &msg, NULL,
-				     0, 0, MSG_PEEK | MSG_DONTWAIT)) < 0 ||
-	       (skb = skb_recv_datagram(svsk->sk_sk, 0, 1, &err)) == NULL) {
-		if (err == -EAGAIN) {
-			svc_sock_received(svsk);
-			return err;
+	skb = NULL;
+	err = kernel_recvmsg(svsk->sk_sock, &msg, NULL,
+			     0, 0, MSG_PEEK | MSG_DONTWAIT);
+	if (err >= 0)
+		skb = skb_recv_datagram(svsk->sk_sk, 0, 1, &err);
+
+	if (skb == NULL) {
+		if (err != -EAGAIN) {
+			/* possibly an icmp error */
+			dprintk("svc: recvfrom returned error %d\n", -err);
+			set_bit(SK_DATA, &svsk->sk_flags);
 		}
-		/* possibly an icmp error */
-		dprintk("svc: recvfrom returned error %d\n", -err);
+		svc_sock_received(svsk);
+		return -EAGAIN;
 	}
 	rqstp->rq_addrlen = sizeof(rqstp->rq_addr);
 	if (skb->tstamp.tv64 == 0) {
@@ -1633,7 +1639,7 @@
 	svsk->sk_server = serv;
 	atomic_set(&svsk->sk_inuse, 1);
 	svsk->sk_lastrecv = get_seconds();
-	spin_lock_init(&svsk->sk_defer_lock);
+	spin_lock_init(&svsk->sk_lock);
 	INIT_LIST_HEAD(&svsk->sk_deferred);
 	INIT_LIST_HEAD(&svsk->sk_ready);
 	mutex_init(&svsk->sk_mutex);
@@ -1857,9 +1863,9 @@
 	dprintk("revisit queued\n");
 	svsk = dr->svsk;
 	dr->svsk = NULL;
-	spin_lock_bh(&svsk->sk_defer_lock);
+	spin_lock(&svsk->sk_lock);
 	list_add(&dr->handle.recent, &svsk->sk_deferred);
-	spin_unlock_bh(&svsk->sk_defer_lock);
+	spin_unlock(&svsk->sk_lock);
 	set_bit(SK_DEFERRED, &svsk->sk_flags);
 	svc_sock_enqueue(svsk);
 	svc_sock_put(svsk);
@@ -1925,7 +1931,7 @@
 
 	if (!test_bit(SK_DEFERRED, &svsk->sk_flags))
 		return NULL;
-	spin_lock_bh(&svsk->sk_defer_lock);
+	spin_lock(&svsk->sk_lock);
 	clear_bit(SK_DEFERRED, &svsk->sk_flags);
 	if (!list_empty(&svsk->sk_deferred)) {
 		dr = list_entry(svsk->sk_deferred.next,
@@ -1934,6 +1940,6 @@
 		list_del_init(&dr->handle.recent);
 		set_bit(SK_DEFERRED, &svsk->sk_flags);
 	}
-	spin_unlock_bh(&svsk->sk_defer_lock);
+	spin_unlock(&svsk->sk_lock);
 	return dr;
 }
diff --git a/scripts/kernel-doc b/scripts/kernel-doc
index a325a0c..e5bf649 100755
--- a/scripts/kernel-doc
+++ b/scripts/kernel-doc
@@ -337,6 +337,7 @@
     }
     return $version;
 }
+my $kernelversion = get_kernel_version();
 
 # generate a sequence of code that will splice in highlighting information
 # using the s// operator.
@@ -610,7 +611,7 @@
     print "<refmeta>\n";
     print " <refentrytitle><phrase>".$args{'function'}."</phrase></refentrytitle>\n";
     print " <manvolnum>9</manvolnum>\n";
-    print " <refmiscinfo class=\"version\">" . get_kernel_version() . "</refmiscinfo>\n";
+    print " <refmiscinfo class=\"version\">" . $kernelversion . "</refmiscinfo>\n";
     print "</refmeta>\n";
     print "<refnamediv>\n";
     print " <refname>".$args{'function'}."</refname>\n";
@@ -687,7 +688,7 @@
     print "<refmeta>\n";
     print " <refentrytitle><phrase>".$args{'type'}." ".$args{'struct'}."</phrase></refentrytitle>\n";
     print " <manvolnum>9</manvolnum>\n";
-    print " <refmiscinfo class=\"version\">" . get_kernel_version() . "</refmiscinfo>\n";
+    print " <refmiscinfo class=\"version\">" . $kernelversion . "</refmiscinfo>\n";
     print "</refmeta>\n";
     print "<refnamediv>\n";
     print " <refname>".$args{'type'}." ".$args{'struct'}."</refname>\n";
@@ -772,7 +773,7 @@
     print "<refmeta>\n";
     print " <refentrytitle><phrase>enum ".$args{'enum'}."</phrase></refentrytitle>\n";
     print " <manvolnum>9</manvolnum>\n";
-    print " <refmiscinfo class=\"version\">" . get_kernel_version() . "</refmiscinfo>\n";
+    print " <refmiscinfo class=\"version\">" . $kernelversion . "</refmiscinfo>\n";
     print "</refmeta>\n";
     print "<refnamediv>\n";
     print " <refname>enum ".$args{'enum'}."</refname>\n";
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 480e18b..113dc77 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -1343,6 +1343,7 @@
 		buf_printf(b, "#ifdef CONFIG_MODULE_UNLOAD\n"
 			      " .exit = cleanup_module,\n"
 			      "#endif\n");
+	buf_printf(b, " .arch = MODULE_ARCH_INIT,\n");
 	buf_printf(b, "};\n");
 }