Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: use kzalloc in ext4_kzalloc()
diff --git a/Documentation/fault-injection/fault-injection.txt b/Documentation/fault-injection/fault-injection.txt
index 7be15e4..82a5d25 100644
--- a/Documentation/fault-injection/fault-injection.txt
+++ b/Documentation/fault-injection/fault-injection.txt
@@ -143,8 +143,7 @@
failslab, fail_page_alloc, and fail_make_request use this way.
Helper functions:
- init_fault_attr_dentries(entries, attr, name);
- void cleanup_fault_attr_dentries(entries);
+ fault_create_debugfs_attr(name, parent, attr);
- module parameters
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index ea0bace..43f4809 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -296,15 +296,6 @@
---------------------------
-What: CONFIG_THERMAL_HWMON
-When: January 2009
-Why: This option was introduced just to allow older lm-sensors userspace
- to keep working over the upgrade to 2.6.26. At the scheduled time of
- removal fixed lm-sensors (2.x or 3.x) should be readily available.
-Who: Rene Herman <rene.herman@gmail.com>
-
----------------------------
-
What: Code that is now under CONFIG_WIRELESS_EXT_SYSFS
(in net/core/net-sysfs.c)
When: After the only user (hal) has seen a release with the patches
diff --git a/Documentation/frv/booting.txt b/Documentation/frv/booting.txt
index ace200b..37c4d84 100644
--- a/Documentation/frv/booting.txt
+++ b/Documentation/frv/booting.txt
@@ -106,13 +106,20 @@
To use the first on-chip serial port at baud rate 115200, no parity, 8
bits, and no flow control.
- (*) root=/dev/<xxxx>
+ (*) root=<xxxx>
- This specifies the device upon which the root filesystem resides. For
- example:
+ This specifies the device upon which the root filesystem resides. It
+ may be specified by major and minor number, device path, or even
+ partition uuid, if supported. For example:
/dev/nfs NFS root filesystem
/dev/mtdblock3 Fourth RedBoot partition on the System Flash
+ PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF/PARTNROFF=1
+ first partition after the partition with the given UUID
+ 253:0 Device with major 253 and minor 0
+
+ Authoritative information can be found in
+ "Documentation/kernel-parameters.txt".
(*) rw
diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index 72ba8d5..845a191 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt
@@ -292,6 +292,7 @@
<mailto:buk@buks.ipn.de>
0xA0 all linux/sdp/sdp.h Industrial Device Project
<mailto:kenji@bitgate.com>
+0xA2 00-0F arch/tile/include/asm/hardwall.h
0xA3 80-8F Port ACL in development:
<mailto:tlewis@mindspring.com>
0xA3 90-9F linux/dtlk.h
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 26a8374..865e39f 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -163,6 +163,11 @@
See also Documentation/power/pm.txt, pci=noacpi
+ acpi_rsdp= [ACPI,EFI,KEXEC]
+ Pass the RSDP address to the kernel, mostly used
+ on machines running EFI runtime service to boot the
+ second kernel for kdump.
+
acpi_apic_instance= [ACPI, IOAPIC]
Format: <int>
2: use 2nd APIC table, if available
@@ -2240,6 +2245,7 @@
ro [KNL] Mount root device read-only on boot
root= [KNL] Root filesystem
+ See name_to_dev_t comment in init/do_mounts.c.
rootdelay= [KNL] Delay (in seconds) to pause before attempting to
mount the root filesystem
diff --git a/Documentation/m68k/kernel-options.txt b/Documentation/m68k/kernel-options.txt
index c93bed6..97d45f2 100644
--- a/Documentation/m68k/kernel-options.txt
+++ b/Documentation/m68k/kernel-options.txt
@@ -129,6 +129,20 @@
the first of these. You can find out all valid major numbers by
looking into include/linux/major.h.
+In addition to major and minor numbers, if the device containing your
+root partition uses a partition table format with unique partition
+identifiers, then you may use them. For instance,
+"root=PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF". It is also
+possible to reference another partition on the same device using a
+known partition UUID as the starting point. For example,
+if partition 5 of the device has the UUID of
+00112233-4455-6677-8899-AABBCCDDEEFF then partition 3 may be found as
+follows:
+ PARTUUID=00112233-4455-6677-8899-AABBCCDDEEFF/PARTNROFF=-2
+
+Authoritative information can be found in
+"Documentation/kernel-parameters.txt".
+
2.2) ro, rw
-----------
diff --git a/arch/cris/arch-v10/drivers/sync_serial.c b/arch/cris/arch-v10/drivers/sync_serial.c
index 85026537..466af40 100644
--- a/arch/cris/arch-v10/drivers/sync_serial.c
+++ b/arch/cris/arch-v10/drivers/sync_serial.c
@@ -158,7 +158,7 @@
static int sync_serial_release(struct inode *inode, struct file *file);
static unsigned int sync_serial_poll(struct file *filp, poll_table *wait);
-static int sync_serial_ioctl(struct file *file,
+static long sync_serial_ioctl(struct file *file,
unsigned int cmd, unsigned long arg);
static ssize_t sync_serial_write(struct file *file, const char *buf,
size_t count, loff_t *ppos);
@@ -625,11 +625,11 @@
*R_IRQ_MASK1_SET = 1 << port->data_avail_bit;
DEBUG(printk(KERN_DEBUG "sser%d rec started\n", dev));
}
- ret = 0;
+ err = 0;
out:
mutex_unlock(&sync_serial_mutex);
- return ret;
+ return err;
}
static int sync_serial_release(struct inode *inode, struct file *file)
diff --git a/arch/cris/arch-v10/kernel/irq.c b/arch/cris/arch-v10/kernel/irq.c
index 907cfb5..ba0e596 100644
--- a/arch/cris/arch-v10/kernel/irq.c
+++ b/arch/cris/arch-v10/kernel/irq.c
@@ -20,6 +20,9 @@
#define crisv10_mask_irq(irq_nr) (*R_VECT_MASK_CLR = 1 << (irq_nr));
#define crisv10_unmask_irq(irq_nr) (*R_VECT_MASK_SET = 1 << (irq_nr));
+extern void kgdb_init(void);
+extern void breakpoint(void);
+
/* don't use set_int_vector, it bypasses the linux interrupt handlers. it is
* global just so that the kernel gdb can use it.
*/
diff --git a/arch/cris/include/asm/thread_info.h b/arch/cris/include/asm/thread_info.h
index 29b74a1..332f19c 100644
--- a/arch/cris/include/asm/thread_info.h
+++ b/arch/cris/include/asm/thread_info.h
@@ -11,8 +11,6 @@
#ifdef __KERNEL__
-#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
-
#ifndef __ASSEMBLY__
#include <asm/types.h>
#include <asm/processor.h>
@@ -67,8 +65,10 @@
#define init_thread_info (init_thread_union.thread_info)
+#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
/* thread information allocation */
-#define alloc_thread_info(tsk, node) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1))
+#define alloc_thread_info_node(tsk, node) \
+ ((struct thread_info *) __get_free_pages(GFP_KERNEL, 1))
#define free_thread_info(ti) free_pages((unsigned long) (ti), 1)
#endif /* !__ASSEMBLY__ */
diff --git a/arch/tile/include/asm/Kbuild b/arch/tile/include/asm/Kbuild
index 849ab2f..aec60dc 100644
--- a/arch/tile/include/asm/Kbuild
+++ b/arch/tile/include/asm/Kbuild
@@ -2,3 +2,41 @@
header-y += ucontext.h
header-y += hardwall.h
+
+generic-y += bug.h
+generic-y += bugs.h
+generic-y += cputime.h
+generic-y += device.h
+generic-y += div64.h
+generic-y += emergency-restart.h
+generic-y += errno.h
+generic-y += fb.h
+generic-y += fcntl.h
+generic-y += ioctl.h
+generic-y += ioctls.h
+generic-y += ipc.h
+generic-y += ipcbuf.h
+generic-y += irq_regs.h
+generic-y += kdebug.h
+generic-y += local.h
+generic-y += module.h
+generic-y += msgbuf.h
+generic-y += mutex.h
+generic-y += param.h
+generic-y += parport.h
+generic-y += poll.h
+generic-y += posix_types.h
+generic-y += resource.h
+generic-y += scatterlist.h
+generic-y += sembuf.h
+generic-y += serial.h
+generic-y += shmbuf.h
+generic-y += shmparam.h
+generic-y += socket.h
+generic-y += sockios.h
+generic-y += statfs.h
+generic-y += termbits.h
+generic-y += termios.h
+generic-y += types.h
+generic-y += ucontext.h
+generic-y += xor.h
diff --git a/arch/tile/include/asm/bug.h b/arch/tile/include/asm/bug.h
deleted file mode 100644
index b12fd89..0000000
--- a/arch/tile/include/asm/bug.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/bug.h>
diff --git a/arch/tile/include/asm/bugs.h b/arch/tile/include/asm/bugs.h
deleted file mode 100644
index 61791e1..0000000
--- a/arch/tile/include/asm/bugs.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/bugs.h>
diff --git a/arch/tile/include/asm/cputime.h b/arch/tile/include/asm/cputime.h
deleted file mode 100644
index 6d68ad7..0000000
--- a/arch/tile/include/asm/cputime.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/cputime.h>
diff --git a/arch/tile/include/asm/device.h b/arch/tile/include/asm/device.h
deleted file mode 100644
index f0a4c25..0000000
--- a/arch/tile/include/asm/device.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/device.h>
diff --git a/arch/tile/include/asm/div64.h b/arch/tile/include/asm/div64.h
deleted file mode 100644
index 6cd978c..0000000
--- a/arch/tile/include/asm/div64.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/div64.h>
diff --git a/arch/tile/include/asm/emergency-restart.h b/arch/tile/include/asm/emergency-restart.h
deleted file mode 100644
index 3711bd9..0000000
--- a/arch/tile/include/asm/emergency-restart.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/emergency-restart.h>
diff --git a/arch/tile/include/asm/errno.h b/arch/tile/include/asm/errno.h
deleted file mode 100644
index 4c82b50..0000000
--- a/arch/tile/include/asm/errno.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/errno.h>
diff --git a/arch/tile/include/asm/fb.h b/arch/tile/include/asm/fb.h
deleted file mode 100644
index 3a4988e..0000000
--- a/arch/tile/include/asm/fb.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/fb.h>
diff --git a/arch/tile/include/asm/fcntl.h b/arch/tile/include/asm/fcntl.h
deleted file mode 100644
index 46ab12d..0000000
--- a/arch/tile/include/asm/fcntl.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/fcntl.h>
diff --git a/arch/tile/include/asm/fixmap.h b/arch/tile/include/asm/fixmap.h
index 51537ff..c66f793 100644
--- a/arch/tile/include/asm/fixmap.h
+++ b/arch/tile/include/asm/fixmap.h
@@ -75,12 +75,6 @@
#define set_fixmap(idx, phys) \
__set_fixmap(idx, phys, PAGE_KERNEL)
-/*
- * Some hardware wants to get fixmapped without caching.
- */
-#define set_fixmap_nocache(idx, phys) \
- __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
-
#define clear_fixmap(idx) \
__set_fixmap(idx, 0, __pgprot(0))
diff --git a/arch/tile/include/asm/ioctl.h b/arch/tile/include/asm/ioctl.h
deleted file mode 100644
index b279fe0..0000000
--- a/arch/tile/include/asm/ioctl.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/ioctl.h>
diff --git a/arch/tile/include/asm/ioctls.h b/arch/tile/include/asm/ioctls.h
deleted file mode 100644
index ec34c76..0000000
--- a/arch/tile/include/asm/ioctls.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/ioctls.h>
diff --git a/arch/tile/include/asm/ipc.h b/arch/tile/include/asm/ipc.h
deleted file mode 100644
index a46e3d9..0000000
--- a/arch/tile/include/asm/ipc.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/ipc.h>
diff --git a/arch/tile/include/asm/ipcbuf.h b/arch/tile/include/asm/ipcbuf.h
deleted file mode 100644
index 84c7e51..0000000
--- a/arch/tile/include/asm/ipcbuf.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/ipcbuf.h>
diff --git a/arch/tile/include/asm/irq_regs.h b/arch/tile/include/asm/irq_regs.h
deleted file mode 100644
index 3dd9c0b..0000000
--- a/arch/tile/include/asm/irq_regs.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/irq_regs.h>
diff --git a/arch/tile/include/asm/kdebug.h b/arch/tile/include/asm/kdebug.h
deleted file mode 100644
index 6ece1b0..0000000
--- a/arch/tile/include/asm/kdebug.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/kdebug.h>
diff --git a/arch/tile/include/asm/local.h b/arch/tile/include/asm/local.h
deleted file mode 100644
index c11c530..0000000
--- a/arch/tile/include/asm/local.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/local.h>
diff --git a/arch/tile/include/asm/module.h b/arch/tile/include/asm/module.h
deleted file mode 100644
index 1e4b79f..0000000
--- a/arch/tile/include/asm/module.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/module.h>
diff --git a/arch/tile/include/asm/msgbuf.h b/arch/tile/include/asm/msgbuf.h
deleted file mode 100644
index 809134c..0000000
--- a/arch/tile/include/asm/msgbuf.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/msgbuf.h>
diff --git a/arch/tile/include/asm/mutex.h b/arch/tile/include/asm/mutex.h
deleted file mode 100644
index ff6101a..0000000
--- a/arch/tile/include/asm/mutex.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/mutex-dec.h>
diff --git a/arch/tile/include/asm/param.h b/arch/tile/include/asm/param.h
deleted file mode 100644
index 965d454..0000000
--- a/arch/tile/include/asm/param.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/param.h>
diff --git a/arch/tile/include/asm/parport.h b/arch/tile/include/asm/parport.h
deleted file mode 100644
index cf252af..0000000
--- a/arch/tile/include/asm/parport.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/parport.h>
diff --git a/arch/tile/include/asm/poll.h b/arch/tile/include/asm/poll.h
deleted file mode 100644
index c98509d..0000000
--- a/arch/tile/include/asm/poll.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/poll.h>
diff --git a/arch/tile/include/asm/posix_types.h b/arch/tile/include/asm/posix_types.h
deleted file mode 100644
index 22cae62..0000000
--- a/arch/tile/include/asm/posix_types.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/posix_types.h>
diff --git a/arch/tile/include/asm/resource.h b/arch/tile/include/asm/resource.h
deleted file mode 100644
index 04bc4db..0000000
--- a/arch/tile/include/asm/resource.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/resource.h>
diff --git a/arch/tile/include/asm/scatterlist.h b/arch/tile/include/asm/scatterlist.h
deleted file mode 100644
index 35d786f..0000000
--- a/arch/tile/include/asm/scatterlist.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/scatterlist.h>
diff --git a/arch/tile/include/asm/sembuf.h b/arch/tile/include/asm/sembuf.h
deleted file mode 100644
index 7673b83..0000000
--- a/arch/tile/include/asm/sembuf.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/sembuf.h>
diff --git a/arch/tile/include/asm/serial.h b/arch/tile/include/asm/serial.h
deleted file mode 100644
index a0cb0caf..0000000
--- a/arch/tile/include/asm/serial.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/serial.h>
diff --git a/arch/tile/include/asm/shmbuf.h b/arch/tile/include/asm/shmbuf.h
deleted file mode 100644
index 83c05fc..0000000
--- a/arch/tile/include/asm/shmbuf.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/shmbuf.h>
diff --git a/arch/tile/include/asm/shmparam.h b/arch/tile/include/asm/shmparam.h
deleted file mode 100644
index 93f30de..0000000
--- a/arch/tile/include/asm/shmparam.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/shmparam.h>
diff --git a/arch/tile/include/asm/socket.h b/arch/tile/include/asm/socket.h
deleted file mode 100644
index 6b71384..0000000
--- a/arch/tile/include/asm/socket.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/socket.h>
diff --git a/arch/tile/include/asm/sockios.h b/arch/tile/include/asm/sockios.h
deleted file mode 100644
index def6d47..0000000
--- a/arch/tile/include/asm/sockios.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/sockios.h>
diff --git a/arch/tile/include/asm/statfs.h b/arch/tile/include/asm/statfs.h
deleted file mode 100644
index 0b91fe1..0000000
--- a/arch/tile/include/asm/statfs.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/statfs.h>
diff --git a/arch/tile/include/asm/termbits.h b/arch/tile/include/asm/termbits.h
deleted file mode 100644
index 3935b10..0000000
--- a/arch/tile/include/asm/termbits.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/termbits.h>
diff --git a/arch/tile/include/asm/termios.h b/arch/tile/include/asm/termios.h
deleted file mode 100644
index 280d78a..0000000
--- a/arch/tile/include/asm/termios.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/termios.h>
diff --git a/arch/tile/include/asm/types.h b/arch/tile/include/asm/types.h
deleted file mode 100644
index b9e79bc..0000000
--- a/arch/tile/include/asm/types.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/types.h>
diff --git a/arch/tile/include/asm/ucontext.h b/arch/tile/include/asm/ucontext.h
deleted file mode 100644
index 9bc07b9..0000000
--- a/arch/tile/include/asm/ucontext.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/ucontext.h>
diff --git a/arch/tile/include/asm/xor.h b/arch/tile/include/asm/xor.h
deleted file mode 100644
index c82eb12..0000000
--- a/arch/tile/include/asm/xor.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/xor.h>
diff --git a/arch/tile/include/hv/drv_srom_intf.h b/arch/tile/include/hv/drv_srom_intf.h
new file mode 100644
index 0000000..6395faa
--- /dev/null
+++ b/arch/tile/include/hv/drv_srom_intf.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2011 Tilera Corporation. All Rights Reserved.
+ *
+ * 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, version 2.
+ *
+ * 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, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ */
+
+/**
+ * @file drv_srom_intf.h
+ * Interface definitions for the SPI Flash ROM driver.
+ */
+
+#ifndef _SYS_HV_INCLUDE_DRV_SROM_INTF_H
+#define _SYS_HV_INCLUDE_DRV_SROM_INTF_H
+
+/** Read this offset to get the total device size. */
+#define SROM_TOTAL_SIZE_OFF 0xF0000000
+
+/** Read this offset to get the device sector size. */
+#define SROM_SECTOR_SIZE_OFF 0xF0000004
+
+/** Read this offset to get the device page size. */
+#define SROM_PAGE_SIZE_OFF 0xF0000008
+
+/** Write this offset to flush any pending writes. */
+#define SROM_FLUSH_OFF 0xF1000000
+
+/** Write this offset, plus the byte offset of the start of a sector, to
+ * erase a sector. Any write data is ignored, but there must be at least
+ * one byte of write data. Only applies when the driver is in MTD mode.
+ */
+#define SROM_ERASE_OFF 0xF2000000
+
+#endif /* _SYS_HV_INCLUDE_DRV_SROM_INTF_H */
diff --git a/arch/tile/kernel/time.c b/arch/tile/kernel/time.c
index c4be58c..f6f50f2a 100644
--- a/arch/tile/kernel/time.c
+++ b/arch/tile/kernel/time.c
@@ -78,7 +78,6 @@
.rating = 300,
.read = clocksource_get_cycles,
.mask = CLOCKSOURCE_MASK(64),
- .shift = 22, /* typical value, e.g. x86 tsc uses this */
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
@@ -91,8 +90,6 @@
cycles_per_sec = hv_sysconf(HV_SYSCONF_CPU_SPEED);
sched_clock_mult =
clocksource_hz2mult(cycles_per_sec, SCHED_CLOCK_SHIFT);
- cycle_counter_cs.mult =
- clocksource_hz2mult(cycles_per_sec, cycle_counter_cs.shift);
}
void __init calibrate_delay(void)
@@ -107,7 +104,7 @@
void __init time_init(void)
{
/* Initialize and register the clock source. */
- clocksource_register(&cycle_counter_cs);
+ clocksource_register_hz(&cycle_counter_cs, cycles_per_sec);
/* Start up the tile-timer interrupt source on the boot cpu. */
setup_tile_timer();
diff --git a/arch/tile/mm/init.c b/arch/tile/mm/init.c
index 4e10c40..7309988c 100644
--- a/arch/tile/mm/init.c
+++ b/arch/tile/mm/init.c
@@ -836,8 +836,7 @@
#endif
#ifdef CONFIG_FLATMEM
- if (!mem_map)
- BUG();
+ BUG_ON(!mem_map);
#endif
#ifdef CONFIG_HIGHMEM
diff --git a/block/blk-core.c b/block/blk-core.c
index b850bed..b627558 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1368,8 +1368,10 @@
static int __init fail_make_request_debugfs(void)
{
- return init_fault_attr_dentries(&fail_make_request,
- "fail_make_request");
+ struct dentry *dir = fault_create_debugfs_attr("fail_make_request",
+ NULL, &fail_make_request);
+
+ return IS_ERR(dir) ? PTR_ERR(dir) : 0;
}
late_initcall(fail_make_request_debugfs);
diff --git a/block/blk-timeout.c b/block/blk-timeout.c
index 4f0c06c..7803548 100644
--- a/block/blk-timeout.c
+++ b/block/blk-timeout.c
@@ -28,7 +28,10 @@
static int __init fail_io_timeout_debugfs(void)
{
- return init_fault_attr_dentries(&fail_io_timeout, "fail_io_timeout");
+ struct dentry *dir = fault_create_debugfs_attr("fail_io_timeout",
+ NULL, &fail_io_timeout);
+
+ return IS_ERR(dir) ? PTR_ERR(dir) : 0;
}
late_initcall(fail_io_timeout_debugfs);
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index 73863d86..76dc02f 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -126,6 +126,12 @@
*/
u8 ACPI_INIT_GLOBAL(acpi_gbl_truncate_io_addresses, FALSE);
+/*
+ * Disable runtime checking and repair of values returned by control methods.
+ * Use only if the repair is causing a problem on a particular machine.
+ */
+u8 ACPI_INIT_GLOBAL(acpi_gbl_disable_auto_repair, FALSE);
+
/* acpi_gbl_FADT is a local copy of the FADT, converted to a common format. */
struct acpi_table_fadt acpi_gbl_FADT;
diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index c7f743c..5552125 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -357,6 +357,7 @@
char *pathname;
const union acpi_predefined_info *predefined;
union acpi_operand_object *parent_package;
+ struct acpi_namespace_node *node;
u32 flags;
u8 node_flags;
};
diff --git a/drivers/acpi/acpica/acpredef.h b/drivers/acpi/acpica/acpredef.h
index 94e73c9..c445cca 100644
--- a/drivers/acpi/acpica/acpredef.h
+++ b/drivers/acpi/acpica/acpredef.h
@@ -468,6 +468,7 @@
{{"_SWS", 0, ACPI_RTYPE_INTEGER}},
{{"_TC1", 0, ACPI_RTYPE_INTEGER}},
{{"_TC2", 0, ACPI_RTYPE_INTEGER}},
+ {{"_TDL", 0, ACPI_RTYPE_INTEGER}},
{{"_TIP", 1, ACPI_RTYPE_INTEGER}},
{{"_TIV", 1, ACPI_RTYPE_INTEGER}},
{{"_TMP", 0, ACPI_RTYPE_INTEGER}},
diff --git a/drivers/acpi/acpica/nspredef.c b/drivers/acpi/acpica/nspredef.c
index 9fb03fa..c845c80 100644
--- a/drivers/acpi/acpica/nspredef.c
+++ b/drivers/acpi/acpica/nspredef.c
@@ -193,14 +193,20 @@
}
/*
- * 1) We have a return value, but if one wasn't expected, just exit, this is
- * not a problem. For example, if the "Implicit Return" feature is
- * enabled, methods will always return a value.
+ * Return value validation and possible repair.
*
- * 2) If the return value can be of any type, then we cannot perform any
- * validation, exit.
+ * 1) Don't perform return value validation/repair if this feature
+ * has been disabled via a global option.
+ *
+ * 2) We have a return value, but if one wasn't expected, just exit,
+ * this is not a problem. For example, if the "Implicit Return"
+ * feature is enabled, methods will always return a value.
+ *
+ * 3) If the return value can be of any type, then we cannot perform
+ * any validation, just exit.
*/
- if ((!predefined->info.expected_btypes) ||
+ if (acpi_gbl_disable_auto_repair ||
+ (!predefined->info.expected_btypes) ||
(predefined->info.expected_btypes == ACPI_RTYPE_ALL)) {
goto cleanup;
}
@@ -212,6 +218,7 @@
goto cleanup;
}
data->predefined = predefined;
+ data->node = node;
data->node_flags = node->flags;
data->pathname = pathname;
diff --git a/drivers/acpi/acpica/nsrepair2.c b/drivers/acpi/acpica/nsrepair2.c
index 973883b..024c4f2 100644
--- a/drivers/acpi/acpica/nsrepair2.c
+++ b/drivers/acpi/acpica/nsrepair2.c
@@ -503,6 +503,21 @@
{
union acpi_operand_object *return_object = *return_object_ptr;
acpi_status status;
+ struct acpi_namespace_node *node;
+
+ /*
+ * We can only sort the _TSS return package if there is no _PSS in the
+ * same scope. This is because if _PSS is present, the ACPI specification
+ * dictates that the _TSS Power Dissipation field is to be ignored, and
+ * therefore some BIOSs leave garbage values in the _TSS Power field(s).
+ * In this case, it is best to just return the _TSS package as-is.
+ * (May, 2011)
+ */
+ status =
+ acpi_ns_get_node(data->node, "^_PSS", ACPI_NS_NO_UPSEARCH, &node);
+ if (ACPI_SUCCESS(status)) {
+ return (AE_OK);
+ }
status = acpi_ns_check_sorted_list(data, return_object, 5, 1,
ACPI_SORT_DESCENDING,
diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c
index 48db094..62365f6 100644
--- a/drivers/acpi/acpica/tbinstal.c
+++ b/drivers/acpi/acpica/tbinstal.c
@@ -126,12 +126,29 @@
}
/*
- * Originally, we checked the table signature for "SSDT" or "PSDT" here.
- * Next, we added support for OEMx tables, signature "OEM".
- * Valid tables were encountered with a null signature, so we've just
- * given up on validating the signature, since it seems to be a waste
- * of code. The original code was removed (05/2008).
+ * Validate the incoming table signature.
+ *
+ * 1) Originally, we checked the table signature for "SSDT" or "PSDT".
+ * 2) We added support for OEMx tables, signature "OEM".
+ * 3) Valid tables were encountered with a null signature, so we just
+ * gave up on validating the signature, (05/2008).
+ * 4) We encountered non-AML tables such as the MADT, which caused
+ * interpreter errors and kernel faults. So now, we once again allow
+ * only "SSDT", "OEMx", and now, also a null signature. (05/2011).
*/
+ if ((table_desc->pointer->signature[0] != 0x00) &&
+ (!ACPI_COMPARE_NAME(table_desc->pointer->signature, ACPI_SIG_SSDT))
+ && (ACPI_STRNCMP(table_desc->pointer->signature, "OEM", 3))) {
+ ACPI_ERROR((AE_INFO,
+ "Table has invalid signature [%4.4s] (0x%8.8X), must be SSDT or OEMx",
+ acpi_ut_valid_acpi_name(*(u32 *)table_desc->
+ pointer->
+ signature) ? table_desc->
+ pointer->signature : "????",
+ *(u32 *)table_desc->pointer->signature));
+
+ return_ACPI_STATUS(AE_BAD_SIGNATURE);
+ }
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 2c66135..87c0a8d 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -55,6 +55,9 @@
#define ACPI_BATTERY_NOTIFY_INFO 0x81
#define ACPI_BATTERY_NOTIFY_THRESHOLD 0x82
+/* Battery power unit: 0 means mW, 1 means mA */
+#define ACPI_BATTERY_POWER_UNIT_MA 1
+
#define _COMPONENT ACPI_BATTERY_COMPONENT
ACPI_MODULE_NAME("battery");
@@ -91,11 +94,6 @@
enum {
ACPI_BATTERY_ALARM_PRESENT,
ACPI_BATTERY_XINFO_PRESENT,
- /* For buggy DSDTs that report negative 16-bit values for either
- * charging or discharging current and/or report 0 as 65536
- * due to bad math.
- */
- ACPI_BATTERY_QUIRK_SIGNED16_CURRENT,
ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY,
};
@@ -301,7 +299,8 @@
#ifdef CONFIG_ACPI_PROCFS_POWER
inline char *acpi_battery_units(struct acpi_battery *battery)
{
- return (battery->power_unit)?"mA":"mW";
+ return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ?
+ "mA" : "mW";
}
#endif
@@ -461,9 +460,17 @@
battery->update_time = jiffies;
kfree(buffer.pointer);
- if (test_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags) &&
- battery->rate_now != -1)
+ /* For buggy DSDTs that report negative 16-bit values for either
+ * charging or discharging current and/or report 0 as 65536
+ * due to bad math.
+ */
+ if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA &&
+ battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN &&
+ (s16)(battery->rate_now) < 0) {
battery->rate_now = abs((s16)battery->rate_now);
+ printk_once(KERN_WARNING FW_BUG "battery: (dis)charge rate"
+ " invalid.\n");
+ }
if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)
&& battery->capacity_now >= 0 && battery->capacity_now <= 100)
@@ -544,7 +551,7 @@
{
int result;
- if (battery->power_unit) {
+ if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) {
battery->bat.properties = charge_battery_props;
battery->bat.num_properties =
ARRAY_SIZE(charge_battery_props);
@@ -566,18 +573,16 @@
static void sysfs_remove_battery(struct acpi_battery *battery)
{
- if (!battery->bat.dev)
+ mutex_lock(&battery->lock);
+ if (!battery->bat.dev) {
+ mutex_unlock(&battery->lock);
return;
+ }
+
device_remove_file(battery->bat.dev, &alarm_attr);
power_supply_unregister(&battery->bat);
battery->bat.dev = NULL;
-}
-
-static void acpi_battery_quirks(struct acpi_battery *battery)
-{
- if (dmi_name_in_vendors("Acer") && battery->power_unit) {
- set_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags);
- }
+ mutex_unlock(&battery->lock);
}
/*
@@ -592,7 +597,7 @@
*
* Handle this correctly so that they won't break userspace.
*/
-static void acpi_battery_quirks2(struct acpi_battery *battery)
+static void acpi_battery_quirks(struct acpi_battery *battery)
{
if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
return ;
@@ -623,13 +628,15 @@
result = acpi_battery_get_info(battery);
if (result)
return result;
- acpi_battery_quirks(battery);
acpi_battery_init_alarm(battery);
}
- if (!battery->bat.dev)
- sysfs_add_battery(battery);
+ if (!battery->bat.dev) {
+ result = sysfs_add_battery(battery);
+ if (result)
+ return result;
+ }
result = acpi_battery_get_state(battery);
- acpi_battery_quirks2(battery);
+ acpi_battery_quirks(battery);
return result;
}
@@ -863,7 +870,7 @@
}, \
}
-static struct battery_file {
+static const struct battery_file {
struct file_operations ops;
mode_t mode;
const char *name;
@@ -948,9 +955,12 @@
struct acpi_battery *battery = container_of(nb, struct acpi_battery,
pm_nb);
switch (mode) {
+ case PM_POST_HIBERNATION:
case PM_POST_SUSPEND:
- sysfs_remove_battery(battery);
- sysfs_add_battery(battery);
+ if (battery->bat.dev) {
+ sysfs_remove_battery(battery);
+ sysfs_add_battery(battery);
+ }
break;
}
@@ -975,25 +985,33 @@
if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle,
"_BIX", &handle)))
set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
- acpi_battery_update(battery);
+ result = acpi_battery_update(battery);
+ if (result)
+ goto fail;
#ifdef CONFIG_ACPI_PROCFS_POWER
result = acpi_battery_add_fs(device);
#endif
- if (!result) {
- printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
- ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
- device->status.battery_present ? "present" : "absent");
- } else {
+ if (result) {
#ifdef CONFIG_ACPI_PROCFS_POWER
acpi_battery_remove_fs(device);
#endif
- kfree(battery);
+ goto fail;
}
+ printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
+ ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
+ device->status.battery_present ? "present" : "absent");
+
battery->pm_nb.notifier_call = battery_notify;
register_pm_notifier(&battery->pm_nb);
return result;
+
+fail:
+ sysfs_remove_battery(battery);
+ mutex_destroy(&battery->lock);
+ kfree(battery);
+ return result;
}
static int acpi_battery_remove(struct acpi_device *device, int type)
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 1864ad3..19a6113 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -77,7 +77,7 @@
struct list_head list;
struct list_head hotplug_list;
acpi_handle handle;
- struct acpi_dock_ops *ops;
+ const struct acpi_dock_ops *ops;
void *context;
};
@@ -589,7 +589,7 @@
* the dock driver after _DCK is executed.
*/
int
-register_hotplug_dock_device(acpi_handle handle, struct acpi_dock_ops *ops,
+register_hotplug_dock_device(acpi_handle handle, const struct acpi_dock_ops *ops,
void *context)
{
struct dock_dependent_device *dd;
diff --git a/drivers/acpi/ec_sys.c b/drivers/acpi/ec_sys.c
index 05b4420..22f918b 100644
--- a/drivers/acpi/ec_sys.c
+++ b/drivers/acpi/ec_sys.c
@@ -92,7 +92,7 @@
return count;
}
-static struct file_operations acpi_ec_io_ops = {
+static const struct file_operations acpi_ec_io_ops = {
.owner = THIS_MODULE,
.open = acpi_ec_open_io,
.read = acpi_ec_read_io,
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index 467479f..0f0356c 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -110,7 +110,7 @@
return result;
}
-static struct thermal_cooling_device_ops fan_cooling_ops = {
+static const struct thermal_cooling_device_ops fan_cooling_ops = {
.get_max_state = fan_get_max_state,
.get_cur_state = fan_get_cur_state,
.set_cur_state = fan_set_cur_state,
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 372f9b7..fa32f58 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -155,7 +155,7 @@
{
if (!strcmp("Linux", interface)) {
- printk(KERN_NOTICE FW_BUG PREFIX
+ printk_once(KERN_NOTICE FW_BUG PREFIX
"BIOS _OSI(Linux) query %s%s\n",
osi_linux.enable ? "honored" : "ignored",
osi_linux.cmdline ? " via cmdline" :
@@ -237,8 +237,23 @@
#endif
}
+#ifdef CONFIG_KEXEC
+static unsigned long acpi_rsdp;
+static int __init setup_acpi_rsdp(char *arg)
+{
+ acpi_rsdp = simple_strtoul(arg, NULL, 16);
+ return 0;
+}
+early_param("acpi_rsdp", setup_acpi_rsdp);
+#endif
+
acpi_physical_address __init acpi_os_get_root_pointer(void)
{
+#ifdef CONFIG_KEXEC
+ if (acpi_rsdp)
+ return acpi_rsdp;
+#endif
+
if (efi_enabled) {
if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
return efi.acpi20;
@@ -1083,7 +1098,13 @@
bool enable;
};
-static struct osi_setup_entry __initdata osi_setup_entries[OSI_STRING_ENTRIES_MAX];
+static struct osi_setup_entry __initdata
+ osi_setup_entries[OSI_STRING_ENTRIES_MAX] = {
+ {"Module Device", true},
+ {"Processor Device", true},
+ {"3.0 _SCP Extensions", true},
+ {"Processor Aggregator Device", true},
+};
void __init acpi_osi_setup(char *str)
{
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index f907cfb..7f9eba9 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -303,6 +303,61 @@
/* --------------------------------------------------------------------------
PCI Interrupt Routing Support
-------------------------------------------------------------------------- */
+#ifdef CONFIG_X86_IO_APIC
+extern int noioapicquirk;
+extern int noioapicreroute;
+
+static int bridge_has_boot_interrupt_variant(struct pci_bus *bus)
+{
+ struct pci_bus *bus_it;
+
+ for (bus_it = bus ; bus_it ; bus_it = bus_it->parent) {
+ if (!bus_it->self)
+ return 0;
+ if (bus_it->self->irq_reroute_variant)
+ return bus_it->self->irq_reroute_variant;
+ }
+ return 0;
+}
+
+/*
+ * Some chipsets (e.g. Intel 6700PXH) generate a legacy INTx when the IRQ
+ * entry in the chipset's IO-APIC is masked (as, e.g. the RT kernel does
+ * during interrupt handling). When this INTx generation cannot be disabled,
+ * we reroute these interrupts to their legacy equivalent to get rid of
+ * spurious interrupts.
+ */
+static int acpi_reroute_boot_interrupt(struct pci_dev *dev,
+ struct acpi_prt_entry *entry)
+{
+ if (noioapicquirk || noioapicreroute) {
+ return 0;
+ } else {
+ switch (bridge_has_boot_interrupt_variant(dev->bus)) {
+ case 0:
+ /* no rerouting necessary */
+ return 0;
+ case INTEL_IRQ_REROUTE_VARIANT:
+ /*
+ * Remap according to INTx routing table in 6700PXH
+ * specs, intel order number 302628-002, section
+ * 2.15.2. Other chipsets (80332, ...) have the same
+ * mapping and are handled here as well.
+ */
+ dev_info(&dev->dev, "PCI IRQ %d -> rerouted to legacy "
+ "IRQ %d\n", entry->index,
+ (entry->index % 4) + 16);
+ entry->index = (entry->index % 4) + 16;
+ return 1;
+ default:
+ dev_warn(&dev->dev, "Cannot reroute IRQ %d to legacy "
+ "IRQ: unknown mapping\n", entry->index);
+ return -1;
+ }
+ }
+}
+#endif /* CONFIG_X86_IO_APIC */
+
static struct acpi_prt_entry *acpi_pci_irq_lookup(struct pci_dev *dev, int pin)
{
struct acpi_prt_entry *entry;
@@ -311,6 +366,9 @@
entry = acpi_pci_irq_find_prt_entry(dev, pin);
if (entry) {
+#ifdef CONFIG_X86_IO_APIC
+ acpi_reroute_boot_interrupt(dev, entry);
+#endif /* CONFIG_X86_IO_APIC */
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %s[%c] _PRT entry\n",
pci_name(dev), pin_name(pin)));
return entry;
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index d06078d..2672c79 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -485,7 +485,8 @@
root->secondary.end = 0xFF;
printk(KERN_WARNING FW_BUG PREFIX
"no secondary bus range in _CRS\n");
- status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN, NULL, &bus);
+ status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN,
+ NULL, &bus);
if (ACPI_SUCCESS(status))
root->secondary.start = bus;
else if (status == AE_NOT_FOUND)
diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c
index 79cb653..870550d 100644
--- a/drivers/acpi/processor_thermal.c
+++ b/drivers/acpi/processor_thermal.c
@@ -244,7 +244,7 @@
return result;
}
-struct thermal_cooling_device_ops processor_cooling_ops = {
+const struct thermal_cooling_device_ops processor_cooling_ops = {
.get_max_state = processor_get_max_state,
.get_cur_state = processor_get_cur_state,
.set_cur_state = processor_set_cur_state,
diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index 50658ff..6e36d0c 100644
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -130,6 +130,9 @@
#define to_acpi_sbs(x) container_of(x, struct acpi_sbs, charger)
+static int acpi_sbs_remove(struct acpi_device *device, int type);
+static int acpi_battery_get_state(struct acpi_battery *battery);
+
static inline int battery_scale(int log)
{
int scale = 1;
@@ -195,6 +198,8 @@
if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
return -ENODEV;
+
+ acpi_battery_get_state(battery);
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
if (battery->rate_now < 0)
@@ -225,11 +230,17 @@
case POWER_SUPPLY_PROP_POWER_NOW:
val->intval = abs(battery->rate_now) *
acpi_battery_ipscale(battery) * 1000;
+ val->intval *= (acpi_battery_mode(battery)) ?
+ (battery->voltage_now *
+ acpi_battery_vscale(battery) / 1000) : 1;
break;
case POWER_SUPPLY_PROP_CURRENT_AVG:
case POWER_SUPPLY_PROP_POWER_AVG:
val->intval = abs(battery->rate_avg) *
acpi_battery_ipscale(battery) * 1000;
+ val->intval *= (acpi_battery_mode(battery)) ?
+ (battery->voltage_now *
+ acpi_battery_vscale(battery) / 1000) : 1;
break;
case POWER_SUPPLY_PROP_CAPACITY:
val->intval = battery->state_of_charge;
@@ -903,8 +914,6 @@
}
}
-static int acpi_sbs_remove(struct acpi_device *device, int type);
-
static int acpi_sbs_add(struct acpi_device *device)
{
struct acpi_sbs *sbs;
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 6c94960..3ed80b2 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -428,6 +428,22 @@
DMI_MATCH(DMI_PRODUCT_NAME, "1000 Series"),
},
},
+ {
+ .callback = init_old_suspend_ordering,
+ .ident = "Asus A8N-SLI DELUXE",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI DELUXE"),
+ },
+ },
+ {
+ .callback = init_old_suspend_ordering,
+ .ident = "Asus A8N-SLI Premium",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "A8N-SLI Premium"),
+ },
+ },
{},
};
#endif /* CONFIG_SUSPEND */
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 77255f2..c538d0e 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -149,12 +149,12 @@
return result;
}
-static struct kernel_param_ops param_ops_debug_layer = {
+static const struct kernel_param_ops param_ops_debug_layer = {
.set = param_set_uint,
.get = param_get_debug_layer,
};
-static struct kernel_param_ops param_ops_debug_level = {
+static const struct kernel_param_ops param_ops_debug_level = {
.set = param_set_uint,
.get = param_get_debug_level,
};
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index 2607e17..48fbc64 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -812,7 +812,7 @@
thermal_zone_unbind_cooling_device);
}
-static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
+static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
.bind = acpi_thermal_bind_cooling_device,
.unbind = acpi_thermal_unbind_cooling_device,
.get_temp = thermal_get_temp,
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index ada4b4d..08a44b5 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -307,7 +307,7 @@
return acpi_video_device_lcd_set_level(video, level);
}
-static struct thermal_cooling_device_ops video_cooling_ops = {
+static const struct thermal_cooling_device_ops video_cooling_ops = {
.get_max_state = video_get_max_state,
.get_cur_state = video_get_cur_state,
.set_cur_state = video_set_cur_state,
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
index e0a5b55..bb7c5f1 100644
--- a/drivers/ata/libata-acpi.c
+++ b/drivers/ata/libata-acpi.c
@@ -218,12 +218,12 @@
ata_acpi_uevent(dev->link->ap, dev, event);
}
-static struct acpi_dock_ops ata_acpi_dev_dock_ops = {
+static const struct acpi_dock_ops ata_acpi_dev_dock_ops = {
.handler = ata_acpi_dev_notify_dock,
.uevent = ata_acpi_dev_uevent,
};
-static struct acpi_dock_ops ata_acpi_ap_dock_ops = {
+static const struct acpi_dock_ops ata_acpi_ap_dock_ops = {
.handler = ata_acpi_ap_notify_dock,
.uevent = ata_acpi_ap_uevent,
};
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 49502bc..423fd56 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -616,5 +616,16 @@
Enables userspace clients to read and write to some packet SMD
ports via device interface for MSM chipset.
+config TILE_SROM
+ bool "Character-device access via hypervisor to the Tilera SPI ROM"
+ depends on TILE
+ default y
+ ---help---
+ This device provides character-level read-write access
+ to the SROM, typically via the "0", "1", and "2" devices
+ in /dev/srom/. The Tilera hypervisor makes the flash
+ device appear much like a simple EEPROM, and knows
+ how to partition a single ROM for multiple purposes.
+
endmenu
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 7a00672..32762ba 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -63,3 +63,5 @@
obj-$(CONFIG_JS_RTC) += js-rtc.o
js-rtc-y = rtc.o
+
+obj-$(CONFIG_TILE_SROM) += tile-srom.o
diff --git a/drivers/char/ramoops.c b/drivers/char/ramoops.c
index fca0c51..810aff9 100644
--- a/drivers/char/ramoops.c
+++ b/drivers/char/ramoops.c
@@ -147,6 +147,14 @@
cxt->phys_addr = pdata->mem_address;
cxt->record_size = pdata->record_size;
cxt->dump_oops = pdata->dump_oops;
+ /*
+ * Update the module parameter variables as well so they are visible
+ * through /sys/module/ramoops/parameters/
+ */
+ mem_size = pdata->mem_size;
+ mem_address = pdata->mem_address;
+ record_size = pdata->record_size;
+ dump_oops = pdata->dump_oops;
if (!request_mem_region(cxt->phys_addr, cxt->size, "ramoops")) {
pr_err("request mem region failed\n");
diff --git a/drivers/char/tile-srom.c b/drivers/char/tile-srom.c
new file mode 100644
index 0000000..cf3ee00
--- /dev/null
+++ b/drivers/char/tile-srom.c
@@ -0,0 +1,481 @@
+/*
+ * Copyright 2011 Tilera Corporation. All Rights Reserved.
+ *
+ * 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, version 2.
+ *
+ * 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, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ *
+ * SPI Flash ROM driver
+ *
+ * This source code is derived from code provided in "Linux Device
+ * Drivers, Third Edition", by Jonathan Corbet, Alessandro Rubini, and
+ * Greg Kroah-Hartman, published by O'Reilly Media, Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/kernel.h> /* printk() */
+#include <linux/slab.h> /* kmalloc() */
+#include <linux/fs.h> /* everything... */
+#include <linux/errno.h> /* error codes */
+#include <linux/types.h> /* size_t */
+#include <linux/proc_fs.h>
+#include <linux/fcntl.h> /* O_ACCMODE */
+#include <linux/aio.h>
+#include <linux/pagemap.h>
+#include <linux/hugetlb.h>
+#include <linux/uaccess.h>
+#include <linux/platform_device.h>
+#include <hv/hypervisor.h>
+#include <linux/ioctl.h>
+#include <linux/cdev.h>
+#include <linux/delay.h>
+#include <hv/drv_srom_intf.h>
+
+/*
+ * Size of our hypervisor I/O requests. We break up large transfers
+ * so that we don't spend large uninterrupted spans of time in the
+ * hypervisor. Erasing an SROM sector takes a significant fraction of
+ * a second, so if we allowed the user to, say, do one I/O to write the
+ * entire ROM, we'd get soft lockup timeouts, or worse.
+ */
+#define SROM_CHUNK_SIZE ((size_t)4096)
+
+/*
+ * When hypervisor is busy (e.g. erasing), poll the status periodically.
+ */
+
+/*
+ * Interval to poll the state in msec
+ */
+#define SROM_WAIT_TRY_INTERVAL 20
+
+/*
+ * Maximum times to poll the state
+ */
+#define SROM_MAX_WAIT_TRY_TIMES 1000
+
+struct srom_dev {
+ int hv_devhdl; /* Handle for hypervisor device */
+ u32 total_size; /* Size of this device */
+ u32 sector_size; /* Size of a sector */
+ u32 page_size; /* Size of a page */
+ struct mutex lock; /* Allow only one accessor at a time */
+};
+
+static int srom_major; /* Dynamic major by default */
+module_param(srom_major, int, 0);
+MODULE_AUTHOR("Tilera Corporation");
+MODULE_LICENSE("GPL");
+
+static int srom_devs; /* Number of SROM partitions */
+static struct cdev srom_cdev;
+static struct class *srom_class;
+static struct srom_dev *srom_devices;
+
+/*
+ * Handle calling the hypervisor and managing EAGAIN/EBUSY.
+ */
+
+static ssize_t _srom_read(int hv_devhdl, void *buf,
+ loff_t off, size_t count)
+{
+ int retval, retries = SROM_MAX_WAIT_TRY_TIMES;
+ for (;;) {
+ retval = hv_dev_pread(hv_devhdl, 0, (HV_VirtAddr)buf,
+ count, off);
+ if (retval >= 0)
+ return retval;
+ if (retval == HV_EAGAIN)
+ continue;
+ if (retval == HV_EBUSY && --retries > 0) {
+ msleep(SROM_WAIT_TRY_INTERVAL);
+ continue;
+ }
+ pr_err("_srom_read: error %d\n", retval);
+ return -EIO;
+ }
+}
+
+static ssize_t _srom_write(int hv_devhdl, const void *buf,
+ loff_t off, size_t count)
+{
+ int retval, retries = SROM_MAX_WAIT_TRY_TIMES;
+ for (;;) {
+ retval = hv_dev_pwrite(hv_devhdl, 0, (HV_VirtAddr)buf,
+ count, off);
+ if (retval >= 0)
+ return retval;
+ if (retval == HV_EAGAIN)
+ continue;
+ if (retval == HV_EBUSY && --retries > 0) {
+ msleep(SROM_WAIT_TRY_INTERVAL);
+ continue;
+ }
+ pr_err("_srom_write: error %d\n", retval);
+ return -EIO;
+ }
+}
+
+/**
+ * srom_open() - Device open routine.
+ * @inode: Inode for this device.
+ * @filp: File for this specific open of the device.
+ *
+ * Returns zero, or an error code.
+ */
+static int srom_open(struct inode *inode, struct file *filp)
+{
+ filp->private_data = &srom_devices[iminor(inode)];
+ return 0;
+}
+
+
+/**
+ * srom_release() - Device release routine.
+ * @inode: Inode for this device.
+ * @filp: File for this specific open of the device.
+ *
+ * Returns zero, or an error code.
+ */
+static int srom_release(struct inode *inode, struct file *filp)
+{
+ struct srom_dev *srom = filp->private_data;
+ char dummy;
+
+ /* Make sure we've flushed anything written to the ROM. */
+ mutex_lock(&srom->lock);
+ if (srom->hv_devhdl >= 0)
+ _srom_write(srom->hv_devhdl, &dummy, SROM_FLUSH_OFF, 1);
+ mutex_unlock(&srom->lock);
+
+ filp->private_data = NULL;
+
+ return 0;
+}
+
+
+/**
+ * srom_read() - Read data from the device.
+ * @filp: File for this specific open of the device.
+ * @buf: User's data buffer.
+ * @count: Number of bytes requested.
+ * @f_pos: File position.
+ *
+ * Returns number of bytes read, or an error code.
+ */
+static ssize_t srom_read(struct file *filp, char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ int retval = 0;
+ void *kernbuf;
+ struct srom_dev *srom = filp->private_data;
+
+ kernbuf = kmalloc(SROM_CHUNK_SIZE, GFP_KERNEL);
+ if (!kernbuf)
+ return -ENOMEM;
+
+ if (mutex_lock_interruptible(&srom->lock)) {
+ retval = -ERESTARTSYS;
+ kfree(kernbuf);
+ return retval;
+ }
+
+ while (count) {
+ int hv_retval;
+ int bytes_this_pass = min(count, SROM_CHUNK_SIZE);
+
+ hv_retval = _srom_read(srom->hv_devhdl, kernbuf,
+ *f_pos, bytes_this_pass);
+ if (hv_retval > 0) {
+ if (copy_to_user(buf, kernbuf, hv_retval) != 0) {
+ retval = -EFAULT;
+ break;
+ }
+ } else if (hv_retval <= 0) {
+ if (retval == 0)
+ retval = hv_retval;
+ break;
+ }
+
+ retval += hv_retval;
+ *f_pos += hv_retval;
+ buf += hv_retval;
+ count -= hv_retval;
+ }
+
+ mutex_unlock(&srom->lock);
+ kfree(kernbuf);
+
+ return retval;
+}
+
+/**
+ * srom_write() - Write data to the device.
+ * @filp: File for this specific open of the device.
+ * @buf: User's data buffer.
+ * @count: Number of bytes requested.
+ * @f_pos: File position.
+ *
+ * Returns number of bytes written, or an error code.
+ */
+static ssize_t srom_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *f_pos)
+{
+ int retval = 0;
+ void *kernbuf;
+ struct srom_dev *srom = filp->private_data;
+
+ kernbuf = kmalloc(SROM_CHUNK_SIZE, GFP_KERNEL);
+ if (!kernbuf)
+ return -ENOMEM;
+
+ if (mutex_lock_interruptible(&srom->lock)) {
+ retval = -ERESTARTSYS;
+ kfree(kernbuf);
+ return retval;
+ }
+
+ while (count) {
+ int hv_retval;
+ int bytes_this_pass = min(count, SROM_CHUNK_SIZE);
+
+ if (copy_from_user(kernbuf, buf, bytes_this_pass) != 0) {
+ retval = -EFAULT;
+ break;
+ }
+
+ hv_retval = _srom_write(srom->hv_devhdl, kernbuf,
+ *f_pos, bytes_this_pass);
+ if (hv_retval <= 0) {
+ if (retval == 0)
+ retval = hv_retval;
+ break;
+ }
+
+ retval += hv_retval;
+ *f_pos += hv_retval;
+ buf += hv_retval;
+ count -= hv_retval;
+ }
+
+ mutex_unlock(&srom->lock);
+ kfree(kernbuf);
+
+ return retval;
+}
+
+/* Provide our own implementation so we can use srom->total_size. */
+loff_t srom_llseek(struct file *filp, loff_t offset, int origin)
+{
+ struct srom_dev *srom = filp->private_data;
+
+ if (mutex_lock_interruptible(&srom->lock))
+ return -ERESTARTSYS;
+
+ switch (origin) {
+ case SEEK_END:
+ offset += srom->total_size;
+ break;
+ case SEEK_CUR:
+ offset += filp->f_pos;
+ break;
+ }
+
+ if (offset < 0 || offset > srom->total_size) {
+ offset = -EINVAL;
+ } else {
+ filp->f_pos = offset;
+ filp->f_version = 0;
+ }
+
+ mutex_unlock(&srom->lock);
+
+ return offset;
+}
+
+static ssize_t total_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct srom_dev *srom = dev_get_drvdata(dev);
+ return sprintf(buf, "%u\n", srom->total_size);
+}
+
+static ssize_t sector_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct srom_dev *srom = dev_get_drvdata(dev);
+ return sprintf(buf, "%u\n", srom->sector_size);
+}
+
+static ssize_t page_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct srom_dev *srom = dev_get_drvdata(dev);
+ return sprintf(buf, "%u\n", srom->page_size);
+}
+
+static struct device_attribute srom_dev_attrs[] = {
+ __ATTR(total_size, S_IRUGO, total_show, NULL),
+ __ATTR(sector_size, S_IRUGO, sector_show, NULL),
+ __ATTR(page_size, S_IRUGO, page_show, NULL),
+ __ATTR_NULL
+};
+
+static char *srom_devnode(struct device *dev, mode_t *mode)
+{
+ *mode = S_IRUGO | S_IWUSR;
+ return kasprintf(GFP_KERNEL, "srom/%s", dev_name(dev));
+}
+
+/*
+ * The fops
+ */
+static const struct file_operations srom_fops = {
+ .owner = THIS_MODULE,
+ .llseek = srom_llseek,
+ .read = srom_read,
+ .write = srom_write,
+ .open = srom_open,
+ .release = srom_release,
+};
+
+/**
+ * srom_setup_minor() - Initialize per-minor information.
+ * @srom: Per-device SROM state.
+ * @index: Device to set up.
+ */
+static int srom_setup_minor(struct srom_dev *srom, int index)
+{
+ struct device *dev;
+ int devhdl = srom->hv_devhdl;
+
+ mutex_init(&srom->lock);
+
+ if (_srom_read(devhdl, &srom->total_size,
+ SROM_TOTAL_SIZE_OFF, sizeof(srom->total_size)) < 0)
+ return -EIO;
+ if (_srom_read(devhdl, &srom->sector_size,
+ SROM_SECTOR_SIZE_OFF, sizeof(srom->sector_size)) < 0)
+ return -EIO;
+ if (_srom_read(devhdl, &srom->page_size,
+ SROM_PAGE_SIZE_OFF, sizeof(srom->page_size)) < 0)
+ return -EIO;
+
+ dev = device_create(srom_class, &platform_bus,
+ MKDEV(srom_major, index), srom, "%d", index);
+ return IS_ERR(dev) ? PTR_ERR(dev) : 0;
+}
+
+/** srom_init() - Initialize the driver's module. */
+static int srom_init(void)
+{
+ int result, i;
+ dev_t dev = MKDEV(srom_major, 0);
+
+ /*
+ * Start with a plausible number of partitions; the krealloc() call
+ * below will yield about log(srom_devs) additional allocations.
+ */
+ srom_devices = kzalloc(4 * sizeof(struct srom_dev), GFP_KERNEL);
+
+ /* Discover the number of srom partitions. */
+ for (i = 0; ; i++) {
+ int devhdl;
+ char buf[20];
+ struct srom_dev *new_srom_devices =
+ krealloc(srom_devices, (i+1) * sizeof(struct srom_dev),
+ GFP_KERNEL | __GFP_ZERO);
+ if (!new_srom_devices) {
+ result = -ENOMEM;
+ goto fail_mem;
+ }
+ srom_devices = new_srom_devices;
+ sprintf(buf, "srom/0/%d", i);
+ devhdl = hv_dev_open((HV_VirtAddr)buf, 0);
+ if (devhdl < 0) {
+ if (devhdl != HV_ENODEV)
+ pr_notice("srom/%d: hv_dev_open failed: %d.\n",
+ i, devhdl);
+ break;
+ }
+ srom_devices[i].hv_devhdl = devhdl;
+ }
+ srom_devs = i;
+
+ /* Bail out early if we have no partitions at all. */
+ if (srom_devs == 0) {
+ result = -ENODEV;
+ goto fail_mem;
+ }
+
+ /* Register our major, and accept a dynamic number. */
+ if (srom_major)
+ result = register_chrdev_region(dev, srom_devs, "srom");
+ else {
+ result = alloc_chrdev_region(&dev, 0, srom_devs, "srom");
+ srom_major = MAJOR(dev);
+ }
+ if (result < 0)
+ goto fail_mem;
+
+ /* Register a character device. */
+ cdev_init(&srom_cdev, &srom_fops);
+ srom_cdev.owner = THIS_MODULE;
+ srom_cdev.ops = &srom_fops;
+ result = cdev_add(&srom_cdev, dev, srom_devs);
+ if (result < 0)
+ goto fail_chrdev;
+
+ /* Create a sysfs class. */
+ srom_class = class_create(THIS_MODULE, "srom");
+ if (IS_ERR(srom_class)) {
+ result = PTR_ERR(srom_class);
+ goto fail_cdev;
+ }
+ srom_class->dev_attrs = srom_dev_attrs;
+ srom_class->devnode = srom_devnode;
+
+ /* Do per-partition initialization */
+ for (i = 0; i < srom_devs; i++) {
+ result = srom_setup_minor(srom_devices + i, i);
+ if (result < 0)
+ goto fail_class;
+ }
+
+ return 0;
+
+fail_class:
+ for (i = 0; i < srom_devs; i++)
+ device_destroy(srom_class, MKDEV(srom_major, i));
+ class_destroy(srom_class);
+fail_cdev:
+ cdev_del(&srom_cdev);
+fail_chrdev:
+ unregister_chrdev_region(dev, srom_devs);
+fail_mem:
+ kfree(srom_devices);
+ return result;
+}
+
+/** srom_cleanup() - Clean up the driver's module. */
+static void srom_cleanup(void)
+{
+ int i;
+ for (i = 0; i < srom_devs; i++)
+ device_destroy(srom_class, MKDEV(srom_major, i));
+ class_destroy(srom_class);
+ cdev_del(&srom_cdev);
+ unregister_chrdev_region(MKDEV(srom_major, 0), srom_devs);
+ kfree(srom_devices);
+}
+
+module_init(srom_init);
+module_exit(srom_cleanup);
diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c
index 7fc2f10..3f4051a 100644
--- a/drivers/char/tpm/tpm_tis.c
+++ b/drivers/char/tpm/tpm_tis.c
@@ -80,7 +80,7 @@
static LIST_HEAD(tis_chips);
static DEFINE_SPINLOCK(tis_lock);
-#ifdef CONFIG_PNP
+#if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
static int is_itpm(struct pnp_dev *dev)
{
struct acpi_device *acpi = pnp_acpi_device(dev);
@@ -93,6 +93,11 @@
return 0;
}
+#else
+static inline int is_itpm(struct pnp_dev *dev)
+{
+ return 0;
+}
#endif
static int check_locality(struct tpm_chip *chip, int l)
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index eacb05e..eb80b54 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -157,7 +157,7 @@
return length;
}
-static unsigned long
+static inline unsigned long
utf16_strlen(efi_char16_t *s)
{
return utf16_strnlen(s, ~0UL);
@@ -580,8 +580,8 @@
return -1;
}
-static u64 efi_pstore_write(enum pstore_type_id type, int part, size_t size,
- struct pstore_info *psi)
+static u64 efi_pstore_write(enum pstore_type_id type, unsigned int part,
+ size_t size, struct pstore_info *psi)
{
return 0;
}
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index a70fa89..2202857 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -110,7 +110,7 @@
}
-static struct acpi_dock_ops acpiphp_dock_ops = {
+static const struct acpi_dock_ops acpiphp_dock_ops = {
.handler = handle_hotplug_event_func,
};
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index bcae8dd..7789002 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -368,7 +368,7 @@
pr_info("%s: already running\n", pdev->name);
/* force to 24 hour mode */
- new_ctrl = reg & ~(OMAP_RTC_CTRL_SPLIT|OMAP_RTC_CTRL_AUTO_COMP);
+ new_ctrl = reg & (OMAP_RTC_CTRL_SPLIT|OMAP_RTC_CTRL_AUTO_COMP);
new_ctrl |= OMAP_RTC_CTRL_STOP;
/* BOARD-SPECIFIC CUSTOMIZATION CAN GO HERE:
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index bf7c687..f7f71b2 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -14,11 +14,7 @@
If you want this support, you should say Y or M here.
config THERMAL_HWMON
- bool "Hardware monitoring support"
+ bool
depends on THERMAL
depends on HWMON=y || HWMON=THERMAL
- help
- The generic thermal sysfs driver's hardware monitoring support
- requires a 2.10.7/3.0.2 or later lm-sensors userspace.
-
- Say Y if your user-space is new enough.
+ default y
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index 0b1c82a..708f8e9 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -420,6 +420,29 @@
/* hwmon sys I/F */
#include <linux/hwmon.h>
+
+/* thermal zone devices with the same type share one hwmon device */
+struct thermal_hwmon_device {
+ char type[THERMAL_NAME_LENGTH];
+ struct device *device;
+ int count;
+ struct list_head tz_list;
+ struct list_head node;
+};
+
+struct thermal_hwmon_attr {
+ struct device_attribute attr;
+ char name[16];
+};
+
+/* one temperature input for each thermal zone */
+struct thermal_hwmon_temp {
+ struct list_head hwmon_node;
+ struct thermal_zone_device *tz;
+ struct thermal_hwmon_attr temp_input; /* hwmon sys attr */
+ struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */
+};
+
static LIST_HEAD(thermal_hwmon_list);
static ssize_t
@@ -437,9 +460,10 @@
int ret;
struct thermal_hwmon_attr *hwmon_attr
= container_of(attr, struct thermal_hwmon_attr, attr);
- struct thermal_zone_device *tz
- = container_of(hwmon_attr, struct thermal_zone_device,
+ struct thermal_hwmon_temp *temp
+ = container_of(hwmon_attr, struct thermal_hwmon_temp,
temp_input);
+ struct thermal_zone_device *tz = temp->tz;
ret = tz->ops->get_temp(tz, &temperature);
@@ -455,9 +479,10 @@
{
struct thermal_hwmon_attr *hwmon_attr
= container_of(attr, struct thermal_hwmon_attr, attr);
- struct thermal_zone_device *tz
- = container_of(hwmon_attr, struct thermal_zone_device,
+ struct thermal_hwmon_temp *temp
+ = container_of(hwmon_attr, struct thermal_hwmon_temp,
temp_crit);
+ struct thermal_zone_device *tz = temp->tz;
long temperature;
int ret;
@@ -469,22 +494,54 @@
}
-static int
-thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
+static struct thermal_hwmon_device *
+thermal_hwmon_lookup_by_type(const struct thermal_zone_device *tz)
{
struct thermal_hwmon_device *hwmon;
- int new_hwmon_device = 1;
- int result;
mutex_lock(&thermal_list_lock);
list_for_each_entry(hwmon, &thermal_hwmon_list, node)
if (!strcmp(hwmon->type, tz->type)) {
- new_hwmon_device = 0;
mutex_unlock(&thermal_list_lock);
- goto register_sys_interface;
+ return hwmon;
}
mutex_unlock(&thermal_list_lock);
+ return NULL;
+}
+
+/* Find the temperature input matching a given thermal zone */
+static struct thermal_hwmon_temp *
+thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon,
+ const struct thermal_zone_device *tz)
+{
+ struct thermal_hwmon_temp *temp;
+
+ mutex_lock(&thermal_list_lock);
+ list_for_each_entry(temp, &hwmon->tz_list, hwmon_node)
+ if (temp->tz == tz) {
+ mutex_unlock(&thermal_list_lock);
+ return temp;
+ }
+ mutex_unlock(&thermal_list_lock);
+
+ return NULL;
+}
+
+static int
+thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
+{
+ struct thermal_hwmon_device *hwmon;
+ struct thermal_hwmon_temp *temp;
+ int new_hwmon_device = 1;
+ int result;
+
+ hwmon = thermal_hwmon_lookup_by_type(tz);
+ if (hwmon) {
+ new_hwmon_device = 0;
+ goto register_sys_interface;
+ }
+
hwmon = kzalloc(sizeof(struct thermal_hwmon_device), GFP_KERNEL);
if (!hwmon)
return -ENOMEM;
@@ -502,30 +559,36 @@
goto free_mem;
register_sys_interface:
- tz->hwmon = hwmon;
+ temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL);
+ if (!temp) {
+ result = -ENOMEM;
+ goto unregister_name;
+ }
+
+ temp->tz = tz;
hwmon->count++;
- snprintf(tz->temp_input.name, THERMAL_NAME_LENGTH,
+ snprintf(temp->temp_input.name, THERMAL_NAME_LENGTH,
"temp%d_input", hwmon->count);
- tz->temp_input.attr.attr.name = tz->temp_input.name;
- tz->temp_input.attr.attr.mode = 0444;
- tz->temp_input.attr.show = temp_input_show;
- sysfs_attr_init(&tz->temp_input.attr.attr);
- result = device_create_file(hwmon->device, &tz->temp_input.attr);
+ temp->temp_input.attr.attr.name = temp->temp_input.name;
+ temp->temp_input.attr.attr.mode = 0444;
+ temp->temp_input.attr.show = temp_input_show;
+ sysfs_attr_init(&temp->temp_input.attr.attr);
+ result = device_create_file(hwmon->device, &temp->temp_input.attr);
if (result)
- goto unregister_name;
+ goto free_temp_mem;
if (tz->ops->get_crit_temp) {
unsigned long temperature;
if (!tz->ops->get_crit_temp(tz, &temperature)) {
- snprintf(tz->temp_crit.name, THERMAL_NAME_LENGTH,
+ snprintf(temp->temp_crit.name, THERMAL_NAME_LENGTH,
"temp%d_crit", hwmon->count);
- tz->temp_crit.attr.attr.name = tz->temp_crit.name;
- tz->temp_crit.attr.attr.mode = 0444;
- tz->temp_crit.attr.show = temp_crit_show;
- sysfs_attr_init(&tz->temp_crit.attr.attr);
+ temp->temp_crit.attr.attr.name = temp->temp_crit.name;
+ temp->temp_crit.attr.attr.mode = 0444;
+ temp->temp_crit.attr.show = temp_crit_show;
+ sysfs_attr_init(&temp->temp_crit.attr.attr);
result = device_create_file(hwmon->device,
- &tz->temp_crit.attr);
+ &temp->temp_crit.attr);
if (result)
goto unregister_input;
}
@@ -534,13 +597,15 @@
mutex_lock(&thermal_list_lock);
if (new_hwmon_device)
list_add_tail(&hwmon->node, &thermal_hwmon_list);
- list_add_tail(&tz->hwmon_node, &hwmon->tz_list);
+ list_add_tail(&temp->hwmon_node, &hwmon->tz_list);
mutex_unlock(&thermal_list_lock);
return 0;
unregister_input:
- device_remove_file(hwmon->device, &tz->temp_input.attr);
+ device_remove_file(hwmon->device, &temp->temp_input.attr);
+ free_temp_mem:
+ kfree(temp);
unregister_name:
if (new_hwmon_device) {
device_remove_file(hwmon->device, &dev_attr_name);
@@ -556,15 +621,30 @@
static void
thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz)
{
- struct thermal_hwmon_device *hwmon = tz->hwmon;
+ struct thermal_hwmon_device *hwmon;
+ struct thermal_hwmon_temp *temp;
- tz->hwmon = NULL;
- device_remove_file(hwmon->device, &tz->temp_input.attr);
+ hwmon = thermal_hwmon_lookup_by_type(tz);
+ if (unlikely(!hwmon)) {
+ /* Should never happen... */
+ dev_dbg(&tz->device, "hwmon device lookup failed!\n");
+ return;
+ }
+
+ temp = thermal_hwmon_lookup_temp(hwmon, tz);
+ if (unlikely(!temp)) {
+ /* Should never happen... */
+ dev_dbg(&tz->device, "temperature input lookup failed!\n");
+ return;
+ }
+
+ device_remove_file(hwmon->device, &temp->temp_input.attr);
if (tz->ops->get_crit_temp)
- device_remove_file(hwmon->device, &tz->temp_crit.attr);
+ device_remove_file(hwmon->device, &temp->temp_crit.attr);
mutex_lock(&thermal_list_lock);
- list_del(&tz->hwmon_node);
+ list_del(&temp->hwmon_node);
+ kfree(temp);
if (!list_empty(&hwmon->tz_list)) {
mutex_unlock(&thermal_list_lock);
return;
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 69407e7..278aeaa 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -336,7 +336,7 @@
enable its driver.
config BACKLIGHT_AAT2870
- bool "AnalogicTech AAT2870 Backlight"
+ tristate "AnalogicTech AAT2870 Backlight"
depends on BACKLIGHT_CLASS_DEVICE && MFD_AAT2870_CORE
help
If you have a AnalogicTech AAT2870 say Y to enable the
diff --git a/drivers/video/backlight/aat2870_bl.c b/drivers/video/backlight/aat2870_bl.c
index 4952a61..331f1ef 100644
--- a/drivers/video/backlight/aat2870_bl.c
+++ b/drivers/video/backlight/aat2870_bl.c
@@ -44,7 +44,7 @@
struct backlight_device *bd = aat2870_bl->bd;
int val;
- val = brightness * aat2870_bl->max_current;
+ val = brightness * (aat2870_bl->max_current - 1);
val /= bd->props.max_brightness;
return val;
@@ -158,10 +158,10 @@
props.type = BACKLIGHT_RAW;
bd = backlight_device_register("aat2870-backlight", &pdev->dev,
aat2870_bl, &aat2870_bl_ops, &props);
- if (!bd) {
+ if (IS_ERR(bd)) {
dev_err(&pdev->dev,
"Failed allocate memory for backlight device\n");
- ret = -ENOMEM;
+ ret = PTR_ERR(bd);
goto out_kfree;
}
@@ -175,7 +175,7 @@
else
aat2870_bl->channels = AAT2870_BL_CH_ALL;
- if (pdata->max_brightness > 0)
+ if (pdata->max_current > 0)
aat2870_bl->max_current = pdata->max_current;
else
aat2870_bl->max_current = AAT2870_CURRENT_27_9;
diff --git a/fs/Kconfig b/fs/Kconfig
index 19891aa..9fe0b34 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -127,14 +127,21 @@
select TMPFS_XATTR
select GENERIC_ACL
help
- POSIX Access Control Lists (ACLs) support permissions for users and
- groups beyond the owner/group/world scheme.
+ POSIX Access Control Lists (ACLs) support additional access rights
+ for users and groups beyond the standard owner/group/world scheme,
+ and this option selects support for ACLs specifically for tmpfs
+ filesystems.
+
+ If you've selected TMPFS, it's possible that you'll also need
+ this option as there are a number of Linux distros that require
+ POSIX ACL support under /dev for certain features to work properly.
+ For example, some distros need this feature for ALSA-related /dev
+ files for sound to work properly. In short, if you're not sure,
+ say Y.
To learn more about Access Control Lists, visit the POSIX ACLs for
Linux website <http://acl.bestbits.at/>.
- If you don't know what Access Control Lists are, say N.
-
config TMPFS_XATTR
bool "Tmpfs extended attributes"
depends on TMPFS
diff --git a/fs/dcache.c b/fs/dcache.c
index 2347cdb..c83cae1 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -795,6 +795,7 @@
/**
* prune_dcache_sb - shrink the dcache
+ * @sb: superblock
* @nr_to_scan: number of entries to try to free
*
* Attempt to shrink the superblock dcache LRU by @nr_to_scan entries. This is
diff --git a/fs/stack.c b/fs/stack.c
index 4a6f7f4..b4f2ab48 100644
--- a/fs/stack.c
+++ b/fs/stack.c
@@ -29,10 +29,7 @@
*
* We don't actually know what locking is used at the lower level;
* but if it's a filesystem that supports quotas, it will be using
- * i_lock as in inode_add_bytes(). tmpfs uses other locking, and
- * its 32-bit is (just) able to exceed 2TB i_size with the aid of
- * holes; but its i_blocks cannot carry into the upper long without
- * almost 2TB swap - let's ignore that case.
+ * i_lock as in inode_add_bytes().
*/
if (sizeof(i_blocks) > sizeof(long))
spin_lock(&src->i_lock);
diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h
index 3090471..e49c36d 100644
--- a/include/acpi/acpi_drivers.h
+++ b/include/acpi/acpi_drivers.h
@@ -128,7 +128,7 @@
extern int register_dock_notifier(struct notifier_block *nb);
extern void unregister_dock_notifier(struct notifier_block *nb);
extern int register_hotplug_dock_device(acpi_handle handle,
- struct acpi_dock_ops *ops,
+ const struct acpi_dock_ops *ops,
void *context);
extern void unregister_hotplug_dock_device(acpi_handle handle);
#else
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 2ed0a84..f554a93 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -47,7 +47,7 @@
/* Current ACPICA subsystem version in YYYYMMDD format */
-#define ACPI_CA_VERSION 0x20110413
+#define ACPI_CA_VERSION 0x20110623
#include "actypes.h"
#include "actbl.h"
@@ -69,6 +69,7 @@
extern u32 acpi_gbl_enable_aml_debug_object;
extern u8 acpi_gbl_copy_dsdt_locally;
extern u8 acpi_gbl_truncate_io_addresses;
+extern u8 acpi_gbl_disable_auto_repair;
extern u32 acpi_current_gpe_count;
extern struct acpi_table_fadt acpi_gbl_FADT;
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index ba4928c..67055f1 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -337,7 +337,7 @@
/* in processor_thermal.c */
int acpi_processor_get_limit_info(struct acpi_processor *pr);
-extern struct thermal_cooling_device_ops processor_cooling_ops;
+extern const struct thermal_cooling_device_ops processor_cooling_ops;
#ifdef CONFIG_CPU_FREQ
void acpi_thermal_cpufreq_init(void);
void acpi_thermal_cpufreq_exit(void);
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 1deb2a7..2312e85 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -238,7 +238,6 @@
extern int pnpacpi_disabled;
#define PXM_INVAL (-1)
-#define NID_INVAL (-1)
int acpi_check_resource_conflict(const struct resource *res);
diff --git a/include/linux/fault-inject.h b/include/linux/fault-inject.h
index 3ff060a..c6f996f 100644
--- a/include/linux/fault-inject.h
+++ b/include/linux/fault-inject.h
@@ -25,10 +25,6 @@
unsigned long reject_end;
unsigned long count;
-
-#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
- struct dentry *dir;
-#endif
};
#define FAULT_ATTR_INITIALIZER { \
@@ -45,19 +41,15 @@
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
-int init_fault_attr_dentries(struct fault_attr *attr, const char *name);
-void cleanup_fault_attr_dentries(struct fault_attr *attr);
+struct dentry *fault_create_debugfs_attr(const char *name,
+ struct dentry *parent, struct fault_attr *attr);
#else /* CONFIG_FAULT_INJECTION_DEBUG_FS */
-static inline int init_fault_attr_dentries(struct fault_attr *attr,
- const char *name)
+static inline struct dentry *fault_create_debugfs_attr(const char *name,
+ struct dentry *parent, struct fault_attr *attr)
{
- return -ENODEV;
-}
-
-static inline void cleanup_fault_attr_dentries(struct fault_attr *attr)
-{
+ return ERR_PTR(-ENODEV);
}
#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index cb40892..3a76faf 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -92,7 +92,7 @@
*/
#define __GFP_NOTRACK_FALSE_POSITIVE (__GFP_NOTRACK)
-#define __GFP_BITS_SHIFT 23 /* Room for 23 __GFP_FOO bits */
+#define __GFP_BITS_SHIFT 24 /* Room for N __GFP_FOO bits */
#define __GFP_BITS_MASK ((__force gfp_t)((1 << __GFP_BITS_SHIFT) - 1))
/* This equals 0, but use constants in case they ever change */
diff --git a/include/linux/idr.h b/include/linux/idr.h
index 13a801f..255491c 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -146,6 +146,10 @@
void ida_destroy(struct ida *ida);
void ida_init(struct ida *ida);
+int ida_simple_get(struct ida *ida, unsigned int start, unsigned int end,
+ gfp_t gfp_mask);
+void ida_simple_remove(struct ida *ida, unsigned int id);
+
void __init idr_init_cache(void);
#endif /* __IDR_H__ */
diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index b966007..3b535db 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -86,8 +86,6 @@
extern void mem_cgroup_uncharge_page(struct page *page);
extern void mem_cgroup_uncharge_cache_page(struct page *page);
-extern int mem_cgroup_shmem_charge_fallback(struct page *page,
- struct mm_struct *mm, gfp_t gfp_mask);
extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
@@ -225,12 +223,6 @@
{
}
-static inline int mem_cgroup_shmem_charge_fallback(struct page *page,
- struct mm_struct *mm, gfp_t gfp_mask)
-{
- return 0;
-}
-
static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
{
}
diff --git a/include/linux/mfd/aat2870.h b/include/linux/mfd/aat2870.h
index 89212df..f7316c2 100644
--- a/include/linux/mfd/aat2870.h
+++ b/include/linux/mfd/aat2870.h
@@ -89,7 +89,7 @@
/* Backlight current magnitude (mA) */
enum aat2870_current {
- AAT2870_CURRENT_0_45,
+ AAT2870_CURRENT_0_45 = 1,
AAT2870_CURRENT_0_90,
AAT2870_CURRENT_1_80,
AAT2870_CURRENT_2_70,
diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h
index 23241c2..9d4539c 100644
--- a/include/linux/radix-tree.h
+++ b/include/linux/radix-tree.h
@@ -39,7 +39,15 @@
* when it is shrunk, before we rcu free the node. See shrink code for
* details.
*/
-#define RADIX_TREE_INDIRECT_PTR 1
+#define RADIX_TREE_INDIRECT_PTR 1
+/*
+ * A common use of the radix tree is to store pointers to struct pages;
+ * but shmem/tmpfs needs also to store swap entries in the same tree:
+ * those are marked as exceptional entries to distinguish them.
+ * EXCEPTIONAL_ENTRY tests the bit, EXCEPTIONAL_SHIFT shifts content past it.
+ */
+#define RADIX_TREE_EXCEPTIONAL_ENTRY 2
+#define RADIX_TREE_EXCEPTIONAL_SHIFT 2
#define radix_tree_indirect_to_ptr(ptr) \
radix_tree_indirect_to_ptr((void __force *)(ptr))
@@ -174,6 +182,28 @@
}
/**
+ * radix_tree_exceptional_entry - radix_tree_deref_slot gave exceptional entry?
+ * @arg: value returned by radix_tree_deref_slot
+ * Returns: 0 if well-aligned pointer, non-0 if exceptional entry.
+ */
+static inline int radix_tree_exceptional_entry(void *arg)
+{
+ /* Not unlikely because radix_tree_exception often tested first */
+ return (unsigned long)arg & RADIX_TREE_EXCEPTIONAL_ENTRY;
+}
+
+/**
+ * radix_tree_exception - radix_tree_deref_slot returned either exception?
+ * @arg: value returned by radix_tree_deref_slot
+ * Returns: 0 if well-aligned pointer, non-0 if either kind of exception.
+ */
+static inline int radix_tree_exception(void *arg)
+{
+ return unlikely((unsigned long)arg &
+ (RADIX_TREE_INDIRECT_PTR | RADIX_TREE_EXCEPTIONAL_ENTRY));
+}
+
+/**
* radix_tree_replace_slot - replace item in a slot
* @pslot: pointer to slot, returned by radix_tree_lookup_slot
* @item: new item to store in the slot.
@@ -194,8 +224,8 @@
unsigned int
radix_tree_gang_lookup(struct radix_tree_root *root, void **results,
unsigned long first_index, unsigned int max_items);
-unsigned int
-radix_tree_gang_lookup_slot(struct radix_tree_root *root, void ***results,
+unsigned int radix_tree_gang_lookup_slot(struct radix_tree_root *root,
+ void ***results, unsigned long *indices,
unsigned long first_index, unsigned int max_items);
unsigned long radix_tree_next_hole(struct radix_tree_root *root,
unsigned long index, unsigned long max_scan);
@@ -222,6 +252,7 @@
unsigned long nr_to_tag,
unsigned int fromtag, unsigned int totag);
int radix_tree_tagged(struct radix_tree_root *root, unsigned int tag);
+unsigned long radix_tree_locate_item(struct radix_tree_root *root, void *item);
static inline void radix_tree_preload_end(void)
{
diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h
index aa08fa8..9291ac3 100644
--- a/include/linux/shmem_fs.h
+++ b/include/linux/shmem_fs.h
@@ -8,22 +8,15 @@
/* inode in-kernel data */
-#define SHMEM_NR_DIRECT 16
-
-#define SHMEM_SYMLINK_INLINE_LEN (SHMEM_NR_DIRECT * sizeof(swp_entry_t))
-
struct shmem_inode_info {
spinlock_t lock;
unsigned long flags;
unsigned long alloced; /* data pages alloced to file */
- unsigned long swapped; /* subtotal assigned to swap */
- unsigned long next_index; /* highest alloced index + 1 */
- struct shared_policy policy; /* NUMA memory alloc policy */
- struct page *i_indirect; /* top indirect blocks page */
union {
- swp_entry_t i_direct[SHMEM_NR_DIRECT]; /* first blocks */
- char inline_symlink[SHMEM_SYMLINK_INLINE_LEN];
+ unsigned long swapped; /* subtotal assigned to swap */
+ char *symlink; /* unswappable short symlink */
};
+ struct shared_policy policy; /* NUMA memory alloc policy */
struct list_head swaplist; /* chain of maybes on swap */
struct list_head xattr_list; /* list of shmem_xattr */
struct inode vfs_inode;
@@ -49,7 +42,7 @@
/*
* Functions in mm/shmem.c called directly from elsewhere:
*/
-extern int init_tmpfs(void);
+extern int shmem_init(void);
extern int shmem_fill_super(struct super_block *sb, void *data, int silent);
extern struct file *shmem_file_setup(const char *name,
loff_t size, unsigned long flags);
@@ -59,8 +52,6 @@
pgoff_t index, gfp_t gfp_mask);
extern void shmem_truncate_range(struct inode *inode, loff_t start, loff_t end);
extern int shmem_unuse(swp_entry_t entry, struct page *page);
-extern void mem_cgroup_get_shmem_target(struct inode *inode, pgoff_t pgoff,
- struct page **pagep, swp_entry_t *ent);
static inline struct page *shmem_read_mapping_page(
struct address_space *mapping, pgoff_t index)
diff --git a/include/linux/swapops.h b/include/linux/swapops.h
index cd42e30..2189d3f 100644
--- a/include/linux/swapops.h
+++ b/include/linux/swapops.h
@@ -1,3 +1,8 @@
+#ifndef _LINUX_SWAPOPS_H
+#define _LINUX_SWAPOPS_H
+
+#include <linux/radix-tree.h>
+
/*
* swapcache pages are stored in the swapper_space radix tree. We want to
* get good packing density in that tree, so the index should be dense in
@@ -76,6 +81,22 @@
return __swp_entry_to_pte(arch_entry);
}
+static inline swp_entry_t radix_to_swp_entry(void *arg)
+{
+ swp_entry_t entry;
+
+ entry.val = (unsigned long)arg >> RADIX_TREE_EXCEPTIONAL_SHIFT;
+ return entry;
+}
+
+static inline void *swp_to_radix_entry(swp_entry_t entry)
+{
+ unsigned long value;
+
+ value = entry.val << RADIX_TREE_EXCEPTIONAL_SHIFT;
+ return (void *)(value | RADIX_TREE_EXCEPTIONAL_ENTRY);
+}
+
#ifdef CONFIG_MIGRATION
static inline swp_entry_t make_migration_entry(struct page *page, int write)
{
@@ -169,3 +190,5 @@
return 0;
}
#endif
+
+#endif /* _LINUX_SWAPOPS_H */
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index d3ec89f..47b4a27 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -85,22 +85,6 @@
((long)t-2732+5)/10 : ((long)t-2732-5)/10)
#define CELSIUS_TO_KELVIN(t) ((t)*10+2732)
-#if defined(CONFIG_THERMAL_HWMON)
-/* thermal zone devices with the same type share one hwmon device */
-struct thermal_hwmon_device {
- char type[THERMAL_NAME_LENGTH];
- struct device *device;
- int count;
- struct list_head tz_list;
- struct list_head node;
-};
-
-struct thermal_hwmon_attr {
- struct device_attribute attr;
- char name[16];
-};
-#endif
-
struct thermal_zone_device {
int id;
char type[THERMAL_NAME_LENGTH];
@@ -120,12 +104,6 @@
struct mutex lock; /* protect cooling devices list */
struct list_head node;
struct delayed_work poll_queue;
-#if defined(CONFIG_THERMAL_HWMON)
- struct list_head hwmon_node;
- struct thermal_hwmon_device *hwmon;
- struct thermal_hwmon_attr temp_input; /* hwmon sys attr */
- struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */
-#endif
};
/* Adding event notification support elements */
#define THERMAL_GENL_FAMILY_NAME "thermal_event"
diff --git a/init/main.c b/init/main.c
index d7211fa..1952d37 100644
--- a/init/main.c
+++ b/init/main.c
@@ -715,7 +715,7 @@
{
cpuset_init_smp();
usermodehelper_init();
- init_tmpfs();
+ shmem_init();
driver_init();
init_irq_proc();
do_ctors();
diff --git a/ipc/shm.c b/ipc/shm.c
index 9fb044f3b..b5bae9d 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -294,7 +294,7 @@
void shm_destroy_orphaned(struct ipc_namespace *ns)
{
down_write(&shm_ids(ns).rw_mutex);
- if (&shm_ids(ns).in_use)
+ if (shm_ids(ns).in_use)
idr_for_each(&shm_ids(ns).ipcs_idr, &shm_try_destroy_orphaned, ns);
up_write(&shm_ids(ns).rw_mutex);
}
@@ -304,9 +304,12 @@
{
struct ipc_namespace *ns = task->nsproxy->ipc_ns;
+ if (shm_ids(ns).in_use == 0)
+ return;
+
/* Destroy all already created segments, but not mapped yet */
down_write(&shm_ids(ns).rw_mutex);
- if (&shm_ids(ns).in_use)
+ if (shm_ids(ns).in_use)
idr_for_each(&shm_ids(ns).ipcs_idr, &shm_try_destroy_current, ns);
up_write(&shm_ids(ns).rw_mutex);
}
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index d1db288..e19ce14 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -291,30 +291,28 @@
if (!cpumask_subset(mask, cpu_possible_mask))
return -EINVAL;
- s = NULL;
if (isadd == REGISTER) {
for_each_cpu(cpu, mask) {
- if (!s)
- s = kmalloc_node(sizeof(struct listener),
- GFP_KERNEL, cpu_to_node(cpu));
+ s = kmalloc_node(sizeof(struct listener),
+ GFP_KERNEL, cpu_to_node(cpu));
if (!s)
goto cleanup;
+
s->pid = pid;
- INIT_LIST_HEAD(&s->list);
s->valid = 1;
listeners = &per_cpu(listener_array, cpu);
down_write(&listeners->sem);
- list_for_each_entry_safe(s2, tmp, &listeners->list, list) {
- if (s2->pid == pid)
- goto next_cpu;
+ list_for_each_entry(s2, &listeners->list, list) {
+ if (s2->pid == pid && s2->valid)
+ goto exists;
}
list_add(&s->list, &listeners->list);
s = NULL;
-next_cpu:
+exists:
up_write(&listeners->sem);
+ kfree(s); /* nop if NULL */
}
- kfree(s);
return 0;
}
diff --git a/lib/fault-inject.c b/lib/fault-inject.c
index 2577b12..f193b77 100644
--- a/lib/fault-inject.c
+++ b/lib/fault-inject.c
@@ -197,21 +197,15 @@
return debugfs_create_file(name, mode, parent, value, &fops_atomic_t);
}
-void cleanup_fault_attr_dentries(struct fault_attr *attr)
-{
- debugfs_remove_recursive(attr->dir);
-}
-
-int init_fault_attr_dentries(struct fault_attr *attr, const char *name)
+struct dentry *fault_create_debugfs_attr(const char *name,
+ struct dentry *parent, struct fault_attr *attr)
{
mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
struct dentry *dir;
- dir = debugfs_create_dir(name, NULL);
+ dir = debugfs_create_dir(name, parent);
if (!dir)
- return -ENOMEM;
-
- attr->dir = dir;
+ return ERR_PTR(-ENOMEM);
if (!debugfs_create_ul("probability", mode, dir, &attr->probability))
goto fail;
@@ -243,11 +237,11 @@
#endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
- return 0;
+ return dir;
fail:
- debugfs_remove_recursive(attr->dir);
+ debugfs_remove_recursive(dir);
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
}
#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
diff --git a/lib/idr.c b/lib/idr.c
index e15502e..db040ce 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -34,8 +34,10 @@
#include <linux/err.h>
#include <linux/string.h>
#include <linux/idr.h>
+#include <linux/spinlock.h>
static struct kmem_cache *idr_layer_cache;
+static DEFINE_SPINLOCK(simple_ida_lock);
static struct idr_layer *get_from_free_list(struct idr *idp)
{
@@ -926,6 +928,71 @@
EXPORT_SYMBOL(ida_destroy);
/**
+ * ida_simple_get - get a new id.
+ * @ida: the (initialized) ida.
+ * @start: the minimum id (inclusive, < 0x8000000)
+ * @end: the maximum id (exclusive, < 0x8000000 or 0)
+ * @gfp_mask: memory allocation flags
+ *
+ * Allocates an id in the range start <= id < end, or returns -ENOSPC.
+ * On memory allocation failure, returns -ENOMEM.
+ *
+ * Use ida_simple_remove() to get rid of an id.
+ */
+int ida_simple_get(struct ida *ida, unsigned int start, unsigned int end,
+ gfp_t gfp_mask)
+{
+ int ret, id;
+ unsigned int max;
+
+ BUG_ON((int)start < 0);
+ BUG_ON((int)end < 0);
+
+ if (end == 0)
+ max = 0x80000000;
+ else {
+ BUG_ON(end < start);
+ max = end - 1;
+ }
+
+again:
+ if (!ida_pre_get(ida, gfp_mask))
+ return -ENOMEM;
+
+ spin_lock(&simple_ida_lock);
+ ret = ida_get_new_above(ida, start, &id);
+ if (!ret) {
+ if (id > max) {
+ ida_remove(ida, id);
+ ret = -ENOSPC;
+ } else {
+ ret = id;
+ }
+ }
+ spin_unlock(&simple_ida_lock);
+
+ if (unlikely(ret == -EAGAIN))
+ goto again;
+
+ return ret;
+}
+EXPORT_SYMBOL(ida_simple_get);
+
+/**
+ * ida_simple_remove - remove an allocated id.
+ * @ida: the (initialized) ida.
+ * @id: the id returned by ida_simple_get.
+ */
+void ida_simple_remove(struct ida *ida, unsigned int id)
+{
+ BUG_ON((int)id < 0);
+ spin_lock(&simple_ida_lock);
+ ida_remove(ida, id);
+ spin_unlock(&simple_ida_lock);
+}
+EXPORT_SYMBOL(ida_simple_remove);
+
+/**
* ida_init - initialize ida handle
* @ida: ida handle
*
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 7ea2e03..a2f9da5 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -823,8 +823,8 @@
EXPORT_SYMBOL(radix_tree_prev_hole);
static unsigned int
-__lookup(struct radix_tree_node *slot, void ***results, unsigned long index,
- unsigned int max_items, unsigned long *next_index)
+__lookup(struct radix_tree_node *slot, void ***results, unsigned long *indices,
+ unsigned long index, unsigned int max_items, unsigned long *next_index)
{
unsigned int nr_found = 0;
unsigned int shift, height;
@@ -857,12 +857,16 @@
/* Bottom level: grab some items */
for (i = index & RADIX_TREE_MAP_MASK; i < RADIX_TREE_MAP_SIZE; i++) {
- index++;
if (slot->slots[i]) {
- results[nr_found++] = &(slot->slots[i]);
- if (nr_found == max_items)
+ results[nr_found] = &(slot->slots[i]);
+ if (indices)
+ indices[nr_found] = index;
+ if (++nr_found == max_items) {
+ index++;
goto out;
+ }
}
+ index++;
}
out:
*next_index = index;
@@ -918,8 +922,8 @@
if (cur_index > max_index)
break;
- slots_found = __lookup(node, (void ***)results + ret, cur_index,
- max_items - ret, &next_index);
+ slots_found = __lookup(node, (void ***)results + ret, NULL,
+ cur_index, max_items - ret, &next_index);
nr_found = 0;
for (i = 0; i < slots_found; i++) {
struct radix_tree_node *slot;
@@ -944,6 +948,7 @@
* radix_tree_gang_lookup_slot - perform multiple slot lookup on radix tree
* @root: radix tree root
* @results: where the results of the lookup are placed
+ * @indices: where their indices should be placed (but usually NULL)
* @first_index: start the lookup from this key
* @max_items: place up to this many items at *results
*
@@ -958,7 +963,8 @@
* protection, radix_tree_deref_slot may fail requiring a retry.
*/
unsigned int
-radix_tree_gang_lookup_slot(struct radix_tree_root *root, void ***results,
+radix_tree_gang_lookup_slot(struct radix_tree_root *root,
+ void ***results, unsigned long *indices,
unsigned long first_index, unsigned int max_items)
{
unsigned long max_index;
@@ -974,6 +980,8 @@
if (first_index > 0)
return 0;
results[0] = (void **)&root->rnode;
+ if (indices)
+ indices[0] = 0;
return 1;
}
node = indirect_to_ptr(node);
@@ -987,8 +995,9 @@
if (cur_index > max_index)
break;
- slots_found = __lookup(node, results + ret, cur_index,
- max_items - ret, &next_index);
+ slots_found = __lookup(node, results + ret,
+ indices ? indices + ret : NULL,
+ cur_index, max_items - ret, &next_index);
ret += slots_found;
if (next_index == 0)
break;
@@ -1194,6 +1203,98 @@
}
EXPORT_SYMBOL(radix_tree_gang_lookup_tag_slot);
+#if defined(CONFIG_SHMEM) && defined(CONFIG_SWAP)
+#include <linux/sched.h> /* for cond_resched() */
+
+/*
+ * This linear search is at present only useful to shmem_unuse_inode().
+ */
+static unsigned long __locate(struct radix_tree_node *slot, void *item,
+ unsigned long index, unsigned long *found_index)
+{
+ unsigned int shift, height;
+ unsigned long i;
+
+ height = slot->height;
+ shift = (height-1) * RADIX_TREE_MAP_SHIFT;
+
+ for ( ; height > 1; height--) {
+ i = (index >> shift) & RADIX_TREE_MAP_MASK;
+ for (;;) {
+ if (slot->slots[i] != NULL)
+ break;
+ index &= ~((1UL << shift) - 1);
+ index += 1UL << shift;
+ if (index == 0)
+ goto out; /* 32-bit wraparound */
+ i++;
+ if (i == RADIX_TREE_MAP_SIZE)
+ goto out;
+ }
+
+ shift -= RADIX_TREE_MAP_SHIFT;
+ slot = rcu_dereference_raw(slot->slots[i]);
+ if (slot == NULL)
+ goto out;
+ }
+
+ /* Bottom level: check items */
+ for (i = 0; i < RADIX_TREE_MAP_SIZE; i++) {
+ if (slot->slots[i] == item) {
+ *found_index = index + i;
+ index = 0;
+ goto out;
+ }
+ }
+ index += RADIX_TREE_MAP_SIZE;
+out:
+ return index;
+}
+
+/**
+ * radix_tree_locate_item - search through radix tree for item
+ * @root: radix tree root
+ * @item: item to be found
+ *
+ * Returns index where item was found, or -1 if not found.
+ * Caller must hold no lock (since this time-consuming function needs
+ * to be preemptible), and must check afterwards if item is still there.
+ */
+unsigned long radix_tree_locate_item(struct radix_tree_root *root, void *item)
+{
+ struct radix_tree_node *node;
+ unsigned long max_index;
+ unsigned long cur_index = 0;
+ unsigned long found_index = -1;
+
+ do {
+ rcu_read_lock();
+ node = rcu_dereference_raw(root->rnode);
+ if (!radix_tree_is_indirect_ptr(node)) {
+ rcu_read_unlock();
+ if (node == item)
+ found_index = 0;
+ break;
+ }
+
+ node = indirect_to_ptr(node);
+ max_index = radix_tree_maxindex(node->height);
+ if (cur_index > max_index)
+ break;
+
+ cur_index = __locate(node, item, cur_index, &found_index);
+ rcu_read_unlock();
+ cond_resched();
+ } while (cur_index != 0 && cur_index <= max_index);
+
+ return found_index;
+}
+#else
+unsigned long radix_tree_locate_item(struct radix_tree_root *root, void *item)
+{
+ return -1;
+}
+#endif /* CONFIG_SHMEM && CONFIG_SWAP */
/**
* radix_tree_shrink - shrink height of a radix tree to minimal
diff --git a/mm/failslab.c b/mm/failslab.c
index 1ce58c2..0dd7b8f 100644
--- a/mm/failslab.c
+++ b/mm/failslab.c
@@ -34,23 +34,23 @@
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
static int __init failslab_debugfs_init(void)
{
+ struct dentry *dir;
mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
- int err;
- err = init_fault_attr_dentries(&failslab.attr, "failslab");
- if (err)
- return err;
+ dir = fault_create_debugfs_attr("failslab", NULL, &failslab.attr);
+ if (IS_ERR(dir))
+ return PTR_ERR(dir);
- if (!debugfs_create_bool("ignore-gfp-wait", mode, failslab.attr.dir,
+ if (!debugfs_create_bool("ignore-gfp-wait", mode, dir,
&failslab.ignore_gfp_wait))
goto fail;
- if (!debugfs_create_bool("cache-filter", mode, failslab.attr.dir,
+ if (!debugfs_create_bool("cache-filter", mode, dir,
&failslab.cache_filter))
goto fail;
return 0;
fail:
- cleanup_fault_attr_dentries(&failslab.attr);
+ debugfs_remove_recursive(dir);
return -ENOMEM;
}
diff --git a/mm/filemap.c b/mm/filemap.c
index 867d402..645a080 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -33,7 +33,6 @@
#include <linux/cpuset.h>
#include <linux/hardirq.h> /* for BUG_ON(!in_atomic()) only */
#include <linux/memcontrol.h>
-#include <linux/mm_inline.h> /* for page_is_file_cache() */
#include <linux/cleancache.h>
#include "internal.h"
@@ -462,6 +461,7 @@
int error;
VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON(PageSwapBacked(page));
error = mem_cgroup_cache_charge(page, current->mm,
gfp_mask & GFP_RECLAIM_MASK);
@@ -479,8 +479,6 @@
if (likely(!error)) {
mapping->nrpages++;
__inc_zone_page_state(page, NR_FILE_PAGES);
- if (PageSwapBacked(page))
- __inc_zone_page_state(page, NR_SHMEM);
spin_unlock_irq(&mapping->tree_lock);
} else {
page->mapping = NULL;
@@ -502,22 +500,9 @@
{
int ret;
- /*
- * Splice_read and readahead add shmem/tmpfs pages into the page cache
- * before shmem_readpage has a chance to mark them as SwapBacked: they
- * need to go on the anon lru below, and mem_cgroup_cache_charge
- * (called in add_to_page_cache) needs to know where they're going too.
- */
- if (mapping_cap_swap_backed(mapping))
- SetPageSwapBacked(page);
-
ret = add_to_page_cache(page, mapping, offset, gfp_mask);
- if (ret == 0) {
- if (page_is_file_cache(page))
- lru_cache_add_file(page);
- else
- lru_cache_add_anon(page);
- }
+ if (ret == 0)
+ lru_cache_add_file(page);
return ret;
}
EXPORT_SYMBOL_GPL(add_to_page_cache_lru);
@@ -714,9 +699,16 @@
page = radix_tree_deref_slot(pagep);
if (unlikely(!page))
goto out;
- if (radix_tree_deref_retry(page))
- goto repeat;
-
+ if (radix_tree_exception(page)) {
+ if (radix_tree_deref_retry(page))
+ goto repeat;
+ /*
+ * Otherwise, shmem/tmpfs must be storing a swap entry
+ * here as an exceptional entry: so return it without
+ * attempting to raise page count.
+ */
+ goto out;
+ }
if (!page_cache_get_speculative(page))
goto repeat;
@@ -753,7 +745,7 @@
repeat:
page = find_get_page(mapping, offset);
- if (page) {
+ if (page && !radix_tree_exception(page)) {
lock_page(page);
/* Has the page been truncated? */
if (unlikely(page->mapping != mapping)) {
@@ -840,7 +832,7 @@
rcu_read_lock();
restart:
nr_found = radix_tree_gang_lookup_slot(&mapping->page_tree,
- (void ***)pages, start, nr_pages);
+ (void ***)pages, NULL, start, nr_pages);
ret = 0;
for (i = 0; i < nr_found; i++) {
struct page *page;
@@ -849,13 +841,22 @@
if (unlikely(!page))
continue;
- /*
- * This can only trigger when the entry at index 0 moves out
- * of or back to the root: none yet gotten, safe to restart.
- */
- if (radix_tree_deref_retry(page)) {
- WARN_ON(start | i);
- goto restart;
+ if (radix_tree_exception(page)) {
+ if (radix_tree_deref_retry(page)) {
+ /*
+ * Transient condition which can only trigger
+ * when entry at index 0 moves out of or back
+ * to root: none yet gotten, safe to restart.
+ */
+ WARN_ON(start | i);
+ goto restart;
+ }
+ /*
+ * Otherwise, shmem/tmpfs must be storing a swap entry
+ * here as an exceptional entry: so skip over it -
+ * we only reach this from invalidate_mapping_pages().
+ */
+ continue;
}
if (!page_cache_get_speculative(page))
@@ -903,7 +904,7 @@
rcu_read_lock();
restart:
nr_found = radix_tree_gang_lookup_slot(&mapping->page_tree,
- (void ***)pages, index, nr_pages);
+ (void ***)pages, NULL, index, nr_pages);
ret = 0;
for (i = 0; i < nr_found; i++) {
struct page *page;
@@ -912,12 +913,22 @@
if (unlikely(!page))
continue;
- /*
- * This can only trigger when the entry at index 0 moves out
- * of or back to the root: none yet gotten, safe to restart.
- */
- if (radix_tree_deref_retry(page))
- goto restart;
+ if (radix_tree_exception(page)) {
+ if (radix_tree_deref_retry(page)) {
+ /*
+ * Transient condition which can only trigger
+ * when entry at index 0 moves out of or back
+ * to root: none yet gotten, safe to restart.
+ */
+ goto restart;
+ }
+ /*
+ * Otherwise, shmem/tmpfs must be storing a swap entry
+ * here as an exceptional entry: so stop looking for
+ * contiguous pages.
+ */
+ break;
+ }
if (!page_cache_get_speculative(page))
goto repeat;
@@ -977,12 +988,21 @@
if (unlikely(!page))
continue;
- /*
- * This can only trigger when the entry at index 0 moves out
- * of or back to the root: none yet gotten, safe to restart.
- */
- if (radix_tree_deref_retry(page))
- goto restart;
+ if (radix_tree_exception(page)) {
+ if (radix_tree_deref_retry(page)) {
+ /*
+ * Transient condition which can only trigger
+ * when entry at index 0 moves out of or back
+ * to root: none yet gotten, safe to restart.
+ */
+ goto restart;
+ }
+ /*
+ * This function is never used on a shmem/tmpfs
+ * mapping, so a swap entry won't be found here.
+ */
+ BUG();
+ }
if (!page_cache_get_speculative(page))
goto repeat;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 5f84d23..f4ec4e7 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -35,7 +35,6 @@
#include <linux/limits.h>
#include <linux/mutex.h>
#include <linux/rbtree.h>
-#include <linux/shmem_fs.h>
#include <linux/slab.h>
#include <linux/swap.h>
#include <linux/swapops.h>
@@ -2873,30 +2872,6 @@
return 0;
if (PageCompound(page))
return 0;
- /*
- * Corner case handling. This is called from add_to_page_cache()
- * in usual. But some FS (shmem) precharges this page before calling it
- * and call add_to_page_cache() with GFP_NOWAIT.
- *
- * For GFP_NOWAIT case, the page may be pre-charged before calling
- * add_to_page_cache(). (See shmem.c) check it here and avoid to call
- * charge twice. (It works but has to pay a bit larger cost.)
- * And when the page is SwapCache, it should take swap information
- * into account. This is under lock_page() now.
- */
- if (!(gfp_mask & __GFP_WAIT)) {
- struct page_cgroup *pc;
-
- pc = lookup_page_cgroup(page);
- if (!pc)
- return 0;
- lock_page_cgroup(pc);
- if (PageCgroupUsed(pc)) {
- unlock_page_cgroup(pc);
- return 0;
- }
- unlock_page_cgroup(pc);
- }
if (unlikely(!mm))
mm = &init_mm;
@@ -3486,31 +3461,6 @@
cgroup_release_and_wakeup_rmdir(&mem->css);
}
-/*
- * A call to try to shrink memory usage on charge failure at shmem's swapin.
- * Calling hierarchical_reclaim is not enough because we should update
- * last_oom_jiffies to prevent pagefault_out_of_memory from invoking global OOM.
- * Moreover considering hierarchy, we should reclaim from the mem_over_limit,
- * not from the memcg which this page would be charged to.
- * try_charge_swapin does all of these works properly.
- */
-int mem_cgroup_shmem_charge_fallback(struct page *page,
- struct mm_struct *mm,
- gfp_t gfp_mask)
-{
- struct mem_cgroup *mem;
- int ret;
-
- if (mem_cgroup_disabled())
- return 0;
-
- ret = mem_cgroup_try_charge_swapin(mm, page, gfp_mask, &mem);
- if (!ret)
- mem_cgroup_cancel_charge_swapin(mem); /* it does !mem check */
-
- return ret;
-}
-
#ifdef CONFIG_DEBUG_VM
static struct page_cgroup *lookup_page_cgroup_used(struct page *page)
{
@@ -5330,15 +5280,17 @@
pgoff = pte_to_pgoff(ptent);
/* page is moved even if it's not RSS of this task(page-faulted). */
- if (!mapping_cap_swap_backed(mapping)) { /* normal file */
- page = find_get_page(mapping, pgoff);
- } else { /* shmem/tmpfs file. we should take account of swap too. */
- swp_entry_t ent;
- mem_cgroup_get_shmem_target(inode, pgoff, &page, &ent);
- if (do_swap_account)
- entry->val = ent.val;
- }
+ page = find_get_page(mapping, pgoff);
+#ifdef CONFIG_SWAP
+ /* shmem/tmpfs may report page out on swap: account for that too. */
+ if (radix_tree_exceptional_entry(page)) {
+ swp_entry_t swap = radix_to_swp_entry(page);
+ if (do_swap_account)
+ *entry = swap;
+ page = find_get_page(&swapper_space, swap.val);
+ }
+#endif
return page;
}
diff --git a/mm/mincore.c b/mm/mincore.c
index a4e6b9d..636a868 100644
--- a/mm/mincore.c
+++ b/mm/mincore.c
@@ -69,12 +69,15 @@
* file will not get a swp_entry_t in its pte, but rather it is like
* any other file mapping (ie. marked !present and faulted in with
* tmpfs's .fault). So swapped out tmpfs mappings are tested here.
- *
- * However when tmpfs moves the page from pagecache and into swapcache,
- * it is still in core, but the find_get_page below won't find it.
- * No big deal, but make a note of it.
*/
page = find_get_page(mapping, pgoff);
+#ifdef CONFIG_SWAP
+ /* shmem/tmpfs may return swap: account for swapcache page too. */
+ if (radix_tree_exceptional_entry(page)) {
+ swp_entry_t swap = radix_to_swp_entry(page);
+ page = find_get_page(&swapper_space, swap.val);
+ }
+#endif
if (page) {
present = PageUptodate(page);
page_cache_release(page);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 1dbcf88..6e8ecb6 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1409,14 +1409,11 @@
{
mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
struct dentry *dir;
- int err;
- err = init_fault_attr_dentries(&fail_page_alloc.attr,
- "fail_page_alloc");
- if (err)
- return err;
-
- dir = fail_page_alloc.attr.dir;
+ dir = fault_create_debugfs_attr("fail_page_alloc", NULL,
+ &fail_page_alloc.attr);
+ if (IS_ERR(dir))
+ return PTR_ERR(dir);
if (!debugfs_create_bool("ignore-gfp-wait", mode, dir,
&fail_page_alloc.ignore_gfp_wait))
@@ -1430,7 +1427,7 @@
return 0;
fail:
- cleanup_fault_attr_dentries(&fail_page_alloc.attr);
+ debugfs_remove_recursive(dir);
return -ENOMEM;
}
diff --git a/mm/shmem.c b/mm/shmem.c
index 5cc21f8..32f6763 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -6,7 +6,8 @@
* 2000-2001 Christoph Rohland
* 2000-2001 SAP AG
* 2002 Red Hat Inc.
- * Copyright (C) 2002-2005 Hugh Dickins.
+ * Copyright (C) 2002-2011 Hugh Dickins.
+ * Copyright (C) 2011 Google Inc.
* Copyright (C) 2002-2005 VERITAS Software Corporation.
* Copyright (C) 2004 Andi Kleen, SuSE Labs
*
@@ -28,7 +29,6 @@
#include <linux/file.h>
#include <linux/mm.h>
#include <linux/module.h>
-#include <linux/percpu_counter.h>
#include <linux/swap.h>
static struct vfsmount *shm_mnt;
@@ -51,6 +51,8 @@
#include <linux/shmem_fs.h>
#include <linux/writeback.h>
#include <linux/blkdev.h>
+#include <linux/pagevec.h>
+#include <linux/percpu_counter.h>
#include <linux/splice.h>
#include <linux/security.h>
#include <linux/swapops.h>
@@ -63,43 +65,17 @@
#include <linux/magic.h>
#include <asm/uaccess.h>
-#include <asm/div64.h>
#include <asm/pgtable.h>
-/*
- * The maximum size of a shmem/tmpfs file is limited by the maximum size of
- * its triple-indirect swap vector - see illustration at shmem_swp_entry().
- *
- * With 4kB page size, maximum file size is just over 2TB on a 32-bit kernel,
- * but one eighth of that on a 64-bit kernel. With 8kB page size, maximum
- * file size is just over 4TB on a 64-bit kernel, but 16TB on a 32-bit kernel,
- * MAX_LFS_FILESIZE being then more restrictive than swap vector layout.
- *
- * We use / and * instead of shifts in the definitions below, so that the swap
- * vector can be tested with small even values (e.g. 20) for ENTRIES_PER_PAGE.
- */
-#define ENTRIES_PER_PAGE (PAGE_CACHE_SIZE/sizeof(unsigned long))
-#define ENTRIES_PER_PAGEPAGE ((unsigned long long)ENTRIES_PER_PAGE*ENTRIES_PER_PAGE)
-
-#define SHMSWP_MAX_INDEX (SHMEM_NR_DIRECT + (ENTRIES_PER_PAGEPAGE/2) * (ENTRIES_PER_PAGE+1))
-#define SHMSWP_MAX_BYTES (SHMSWP_MAX_INDEX << PAGE_CACHE_SHIFT)
-
-#define SHMEM_MAX_BYTES min_t(unsigned long long, SHMSWP_MAX_BYTES, MAX_LFS_FILESIZE)
-#define SHMEM_MAX_INDEX ((unsigned long)((SHMEM_MAX_BYTES+1) >> PAGE_CACHE_SHIFT))
-
#define BLOCKS_PER_PAGE (PAGE_CACHE_SIZE/512)
#define VM_ACCT(size) (PAGE_CACHE_ALIGN(size) >> PAGE_SHIFT)
-/* info->flags needs VM_flags to handle pagein/truncate races efficiently */
-#define SHMEM_PAGEIN VM_READ
-#define SHMEM_TRUNCATE VM_WRITE
-
-/* Definition to limit shmem_truncate's steps between cond_rescheds */
-#define LATENCY_LIMIT 64
-
/* Pretend that each entry is of this size in directory's i_size */
#define BOGO_DIRENT_SIZE 20
+/* Symlink up to this size is kmalloc'ed instead of using a swappable page */
+#define SHORT_SYMLINK_LEN 128
+
struct shmem_xattr {
struct list_head list; /* anchored by shmem_inode_info->xattr_list */
char *name; /* xattr name */
@@ -107,7 +83,7 @@
char value[0];
};
-/* Flag allocation requirements to shmem_getpage and shmem_swp_alloc */
+/* Flag allocation requirements to shmem_getpage */
enum sgp_type {
SGP_READ, /* don't exceed i_size, don't allocate page */
SGP_CACHE, /* don't exceed i_size, may allocate page */
@@ -137,56 +113,6 @@
mapping_gfp_mask(inode->i_mapping), fault_type);
}
-static inline struct page *shmem_dir_alloc(gfp_t gfp_mask)
-{
- /*
- * The above definition of ENTRIES_PER_PAGE, and the use of
- * BLOCKS_PER_PAGE on indirect pages, assume PAGE_CACHE_SIZE:
- * might be reconsidered if it ever diverges from PAGE_SIZE.
- *
- * Mobility flags are masked out as swap vectors cannot move
- */
- return alloc_pages((gfp_mask & ~GFP_MOVABLE_MASK) | __GFP_ZERO,
- PAGE_CACHE_SHIFT-PAGE_SHIFT);
-}
-
-static inline void shmem_dir_free(struct page *page)
-{
- __free_pages(page, PAGE_CACHE_SHIFT-PAGE_SHIFT);
-}
-
-static struct page **shmem_dir_map(struct page *page)
-{
- return (struct page **)kmap_atomic(page, KM_USER0);
-}
-
-static inline void shmem_dir_unmap(struct page **dir)
-{
- kunmap_atomic(dir, KM_USER0);
-}
-
-static swp_entry_t *shmem_swp_map(struct page *page)
-{
- return (swp_entry_t *)kmap_atomic(page, KM_USER1);
-}
-
-static inline void shmem_swp_balance_unmap(void)
-{
- /*
- * When passing a pointer to an i_direct entry, to code which
- * also handles indirect entries and so will shmem_swp_unmap,
- * we must arrange for the preempt count to remain in balance.
- * What kmap_atomic of a lowmem page does depends on config
- * and architecture, so pretend to kmap_atomic some lowmem page.
- */
- (void) kmap_atomic(ZERO_PAGE(0), KM_USER1);
-}
-
-static inline void shmem_swp_unmap(swp_entry_t *entry)
-{
- kunmap_atomic(entry, KM_USER1);
-}
-
static inline struct shmem_sb_info *SHMEM_SB(struct super_block *sb)
{
return sb->s_fs_info;
@@ -244,15 +170,6 @@
static LIST_HEAD(shmem_swaplist);
static DEFINE_MUTEX(shmem_swaplist_mutex);
-static void shmem_free_blocks(struct inode *inode, long pages)
-{
- struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
- if (sbinfo->max_blocks) {
- percpu_counter_add(&sbinfo->used_blocks, -pages);
- inode->i_blocks -= pages*BLOCKS_PER_PAGE;
- }
-}
-
static int shmem_reserve_inode(struct super_block *sb)
{
struct shmem_sb_info *sbinfo = SHMEM_SB(sb);
@@ -279,7 +196,7 @@
}
/**
- * shmem_recalc_inode - recalculate the size of an inode
+ * shmem_recalc_inode - recalculate the block usage of an inode
* @inode: inode to recalc
*
* We have to calculate the free blocks since the mm can drop
@@ -297,474 +214,297 @@
freed = info->alloced - info->swapped - inode->i_mapping->nrpages;
if (freed > 0) {
+ struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
+ if (sbinfo->max_blocks)
+ percpu_counter_add(&sbinfo->used_blocks, -freed);
info->alloced -= freed;
+ inode->i_blocks -= freed * BLOCKS_PER_PAGE;
shmem_unacct_blocks(info->flags, freed);
- shmem_free_blocks(inode, freed);
}
}
-/**
- * shmem_swp_entry - find the swap vector position in the info structure
- * @info: info structure for the inode
- * @index: index of the page to find
- * @page: optional page to add to the structure. Has to be preset to
- * all zeros
- *
- * If there is no space allocated yet it will return NULL when
- * page is NULL, else it will use the page for the needed block,
- * setting it to NULL on return to indicate that it has been used.
- *
- * The swap vector is organized the following way:
- *
- * There are SHMEM_NR_DIRECT entries directly stored in the
- * shmem_inode_info structure. So small files do not need an addional
- * allocation.
- *
- * For pages with index > SHMEM_NR_DIRECT there is the pointer
- * i_indirect which points to a page which holds in the first half
- * doubly indirect blocks, in the second half triple indirect blocks:
- *
- * For an artificial ENTRIES_PER_PAGE = 4 this would lead to the
- * following layout (for SHMEM_NR_DIRECT == 16):
- *
- * i_indirect -> dir --> 16-19
- * | +-> 20-23
- * |
- * +-->dir2 --> 24-27
- * | +-> 28-31
- * | +-> 32-35
- * | +-> 36-39
- * |
- * +-->dir3 --> 40-43
- * +-> 44-47
- * +-> 48-51
- * +-> 52-55
+/*
+ * Replace item expected in radix tree by a new item, while holding tree lock.
*/
-static swp_entry_t *shmem_swp_entry(struct shmem_inode_info *info, unsigned long index, struct page **page)
+static int shmem_radix_tree_replace(struct address_space *mapping,
+ pgoff_t index, void *expected, void *replacement)
{
- unsigned long offset;
- struct page **dir;
- struct page *subdir;
+ void **pslot;
+ void *item = NULL;
- if (index < SHMEM_NR_DIRECT) {
- shmem_swp_balance_unmap();
- return info->i_direct+index;
- }
- if (!info->i_indirect) {
- if (page) {
- info->i_indirect = *page;
- *page = NULL;
+ VM_BUG_ON(!expected);
+ pslot = radix_tree_lookup_slot(&mapping->page_tree, index);
+ if (pslot)
+ item = radix_tree_deref_slot_protected(pslot,
+ &mapping->tree_lock);
+ if (item != expected)
+ return -ENOENT;
+ if (replacement)
+ radix_tree_replace_slot(pslot, replacement);
+ else
+ radix_tree_delete(&mapping->page_tree, index);
+ return 0;
+}
+
+/*
+ * Like add_to_page_cache_locked, but error if expected item has gone.
+ */
+static int shmem_add_to_page_cache(struct page *page,
+ struct address_space *mapping,
+ pgoff_t index, gfp_t gfp, void *expected)
+{
+ int error = 0;
+
+ VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON(!PageSwapBacked(page));
+
+ if (!expected)
+ error = radix_tree_preload(gfp & GFP_RECLAIM_MASK);
+ if (!error) {
+ page_cache_get(page);
+ page->mapping = mapping;
+ page->index = index;
+
+ spin_lock_irq(&mapping->tree_lock);
+ if (!expected)
+ error = radix_tree_insert(&mapping->page_tree,
+ index, page);
+ else
+ error = shmem_radix_tree_replace(mapping, index,
+ expected, page);
+ if (!error) {
+ mapping->nrpages++;
+ __inc_zone_page_state(page, NR_FILE_PAGES);
+ __inc_zone_page_state(page, NR_SHMEM);
+ spin_unlock_irq(&mapping->tree_lock);
+ } else {
+ page->mapping = NULL;
+ spin_unlock_irq(&mapping->tree_lock);
+ page_cache_release(page);
}
- return NULL; /* need another page */
+ if (!expected)
+ radix_tree_preload_end();
}
+ if (error)
+ mem_cgroup_uncharge_cache_page(page);
+ return error;
+}
- index -= SHMEM_NR_DIRECT;
- offset = index % ENTRIES_PER_PAGE;
- index /= ENTRIES_PER_PAGE;
- dir = shmem_dir_map(info->i_indirect);
+/*
+ * Like delete_from_page_cache, but substitutes swap for page.
+ */
+static void shmem_delete_from_page_cache(struct page *page, void *radswap)
+{
+ struct address_space *mapping = page->mapping;
+ int error;
- if (index >= ENTRIES_PER_PAGE/2) {
- index -= ENTRIES_PER_PAGE/2;
- dir += ENTRIES_PER_PAGE/2 + index/ENTRIES_PER_PAGE;
- index %= ENTRIES_PER_PAGE;
- subdir = *dir;
- if (!subdir) {
- if (page) {
- *dir = *page;
- *page = NULL;
+ spin_lock_irq(&mapping->tree_lock);
+ error = shmem_radix_tree_replace(mapping, page->index, page, radswap);
+ page->mapping = NULL;
+ mapping->nrpages--;
+ __dec_zone_page_state(page, NR_FILE_PAGES);
+ __dec_zone_page_state(page, NR_SHMEM);
+ spin_unlock_irq(&mapping->tree_lock);
+ page_cache_release(page);
+ BUG_ON(error);
+}
+
+/*
+ * Like find_get_pages, but collecting swap entries as well as pages.
+ */
+static unsigned shmem_find_get_pages_and_swap(struct address_space *mapping,
+ pgoff_t start, unsigned int nr_pages,
+ struct page **pages, pgoff_t *indices)
+{
+ unsigned int i;
+ unsigned int ret;
+ unsigned int nr_found;
+
+ rcu_read_lock();
+restart:
+ nr_found = radix_tree_gang_lookup_slot(&mapping->page_tree,
+ (void ***)pages, indices, start, nr_pages);
+ ret = 0;
+ for (i = 0; i < nr_found; i++) {
+ struct page *page;
+repeat:
+ page = radix_tree_deref_slot((void **)pages[i]);
+ if (unlikely(!page))
+ continue;
+ if (radix_tree_exception(page)) {
+ if (radix_tree_deref_retry(page))
+ goto restart;
+ /*
+ * Otherwise, we must be storing a swap entry
+ * here as an exceptional entry: so return it
+ * without attempting to raise page count.
+ */
+ goto export;
+ }
+ if (!page_cache_get_speculative(page))
+ goto repeat;
+
+ /* Has the page moved? */
+ if (unlikely(page != *((void **)pages[i]))) {
+ page_cache_release(page);
+ goto repeat;
+ }
+export:
+ indices[ret] = indices[i];
+ pages[ret] = page;
+ ret++;
+ }
+ if (unlikely(!ret && nr_found))
+ goto restart;
+ rcu_read_unlock();
+ return ret;
+}
+
+/*
+ * Remove swap entry from radix tree, free the swap and its page cache.
+ */
+static int shmem_free_swap(struct address_space *mapping,
+ pgoff_t index, void *radswap)
+{
+ int error;
+
+ spin_lock_irq(&mapping->tree_lock);
+ error = shmem_radix_tree_replace(mapping, index, radswap, NULL);
+ spin_unlock_irq(&mapping->tree_lock);
+ if (!error)
+ free_swap_and_cache(radix_to_swp_entry(radswap));
+ return error;
+}
+
+/*
+ * Pagevec may contain swap entries, so shuffle up pages before releasing.
+ */
+static void shmem_pagevec_release(struct pagevec *pvec)
+{
+ int i, j;
+
+ for (i = 0, j = 0; i < pagevec_count(pvec); i++) {
+ struct page *page = pvec->pages[i];
+ if (!radix_tree_exceptional_entry(page))
+ pvec->pages[j++] = page;
+ }
+ pvec->nr = j;
+ pagevec_release(pvec);
+}
+
+/*
+ * Remove range of pages and swap entries from radix tree, and free them.
+ */
+void shmem_truncate_range(struct inode *inode, loff_t lstart, loff_t lend)
+{
+ struct address_space *mapping = inode->i_mapping;
+ struct shmem_inode_info *info = SHMEM_I(inode);
+ pgoff_t start = (lstart + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+ unsigned partial = lstart & (PAGE_CACHE_SIZE - 1);
+ pgoff_t end = (lend >> PAGE_CACHE_SHIFT);
+ struct pagevec pvec;
+ pgoff_t indices[PAGEVEC_SIZE];
+ long nr_swaps_freed = 0;
+ pgoff_t index;
+ int i;
+
+ BUG_ON((lend & (PAGE_CACHE_SIZE - 1)) != (PAGE_CACHE_SIZE - 1));
+
+ pagevec_init(&pvec, 0);
+ index = start;
+ while (index <= end) {
+ pvec.nr = shmem_find_get_pages_and_swap(mapping, index,
+ min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1,
+ pvec.pages, indices);
+ if (!pvec.nr)
+ break;
+ mem_cgroup_uncharge_start();
+ for (i = 0; i < pagevec_count(&pvec); i++) {
+ struct page *page = pvec.pages[i];
+
+ index = indices[i];
+ if (index > end)
+ break;
+
+ if (radix_tree_exceptional_entry(page)) {
+ nr_swaps_freed += !shmem_free_swap(mapping,
+ index, page);
+ continue;
}
- shmem_dir_unmap(dir);
- return NULL; /* need another page */
+
+ if (!trylock_page(page))
+ continue;
+ if (page->mapping == mapping) {
+ VM_BUG_ON(PageWriteback(page));
+ truncate_inode_page(mapping, page);
+ }
+ unlock_page(page);
}
- shmem_dir_unmap(dir);
- dir = shmem_dir_map(subdir);
+ shmem_pagevec_release(&pvec);
+ mem_cgroup_uncharge_end();
+ cond_resched();
+ index++;
}
- dir += index;
- subdir = *dir;
- if (!subdir) {
- if (!page || !(subdir = *page)) {
- shmem_dir_unmap(dir);
- return NULL; /* need a page */
+ if (partial) {
+ struct page *page = NULL;
+ shmem_getpage(inode, start - 1, &page, SGP_READ, NULL);
+ if (page) {
+ zero_user_segment(page, partial, PAGE_CACHE_SIZE);
+ set_page_dirty(page);
+ unlock_page(page);
+ page_cache_release(page);
}
- *dir = subdir;
- *page = NULL;
}
- shmem_dir_unmap(dir);
- return shmem_swp_map(subdir) + offset;
-}
-static void shmem_swp_set(struct shmem_inode_info *info, swp_entry_t *entry, unsigned long value)
-{
- long incdec = value? 1: -1;
-
- entry->val = value;
- info->swapped += incdec;
- if ((unsigned long)(entry - info->i_direct) >= SHMEM_NR_DIRECT) {
- struct page *page = kmap_atomic_to_page(entry);
- set_page_private(page, page_private(page) + incdec);
- }
-}
-
-/**
- * shmem_swp_alloc - get the position of the swap entry for the page.
- * @info: info structure for the inode
- * @index: index of the page to find
- * @sgp: check and recheck i_size? skip allocation?
- * @gfp: gfp mask to use for any page allocation
- *
- * If the entry does not exist, allocate it.
- */
-static swp_entry_t *shmem_swp_alloc(struct shmem_inode_info *info,
- unsigned long index, enum sgp_type sgp, gfp_t gfp)
-{
- struct inode *inode = &info->vfs_inode;
- struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
- struct page *page = NULL;
- swp_entry_t *entry;
-
- if (sgp != SGP_WRITE &&
- ((loff_t) index << PAGE_CACHE_SHIFT) >= i_size_read(inode))
- return ERR_PTR(-EINVAL);
-
- while (!(entry = shmem_swp_entry(info, index, &page))) {
- if (sgp == SGP_READ)
- return shmem_swp_map(ZERO_PAGE(0));
- /*
- * Test used_blocks against 1 less max_blocks, since we have 1 data
- * page (and perhaps indirect index pages) yet to allocate:
- * a waste to allocate index if we cannot allocate data.
- */
- if (sbinfo->max_blocks) {
- if (percpu_counter_compare(&sbinfo->used_blocks,
- sbinfo->max_blocks - 1) >= 0)
- return ERR_PTR(-ENOSPC);
- percpu_counter_inc(&sbinfo->used_blocks);
- inode->i_blocks += BLOCKS_PER_PAGE;
+ index = start;
+ for ( ; ; ) {
+ cond_resched();
+ pvec.nr = shmem_find_get_pages_and_swap(mapping, index,
+ min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1,
+ pvec.pages, indices);
+ if (!pvec.nr) {
+ if (index == start)
+ break;
+ index = start;
+ continue;
}
-
- spin_unlock(&info->lock);
- page = shmem_dir_alloc(gfp);
- spin_lock(&info->lock);
-
- if (!page) {
- shmem_free_blocks(inode, 1);
- return ERR_PTR(-ENOMEM);
- }
- if (sgp != SGP_WRITE &&
- ((loff_t) index << PAGE_CACHE_SHIFT) >= i_size_read(inode)) {
- entry = ERR_PTR(-EINVAL);
+ if (index == start && indices[0] > end) {
+ shmem_pagevec_release(&pvec);
break;
}
- if (info->next_index <= index)
- info->next_index = index + 1;
- }
- if (page) {
- /* another task gave its page, or truncated the file */
- shmem_free_blocks(inode, 1);
- shmem_dir_free(page);
- }
- if (info->next_index <= index && !IS_ERR(entry))
- info->next_index = index + 1;
- return entry;
-}
+ mem_cgroup_uncharge_start();
+ for (i = 0; i < pagevec_count(&pvec); i++) {
+ struct page *page = pvec.pages[i];
-/**
- * shmem_free_swp - free some swap entries in a directory
- * @dir: pointer to the directory
- * @edir: pointer after last entry of the directory
- * @punch_lock: pointer to spinlock when needed for the holepunch case
- */
-static int shmem_free_swp(swp_entry_t *dir, swp_entry_t *edir,
- spinlock_t *punch_lock)
-{
- spinlock_t *punch_unlock = NULL;
- swp_entry_t *ptr;
- int freed = 0;
+ index = indices[i];
+ if (index > end)
+ break;
- for (ptr = dir; ptr < edir; ptr++) {
- if (ptr->val) {
- if (unlikely(punch_lock)) {
- punch_unlock = punch_lock;
- punch_lock = NULL;
- spin_lock(punch_unlock);
- if (!ptr->val)
- continue;
+ if (radix_tree_exceptional_entry(page)) {
+ nr_swaps_freed += !shmem_free_swap(mapping,
+ index, page);
+ continue;
}
- free_swap_and_cache(*ptr);
- *ptr = (swp_entry_t){0};
- freed++;
- }
- }
- if (punch_unlock)
- spin_unlock(punch_unlock);
- return freed;
-}
-static int shmem_map_and_free_swp(struct page *subdir, int offset,
- int limit, struct page ***dir, spinlock_t *punch_lock)
-{
- swp_entry_t *ptr;
- int freed = 0;
-
- ptr = shmem_swp_map(subdir);
- for (; offset < limit; offset += LATENCY_LIMIT) {
- int size = limit - offset;
- if (size > LATENCY_LIMIT)
- size = LATENCY_LIMIT;
- freed += shmem_free_swp(ptr+offset, ptr+offset+size,
- punch_lock);
- if (need_resched()) {
- shmem_swp_unmap(ptr);
- if (*dir) {
- shmem_dir_unmap(*dir);
- *dir = NULL;
+ lock_page(page);
+ if (page->mapping == mapping) {
+ VM_BUG_ON(PageWriteback(page));
+ truncate_inode_page(mapping, page);
}
- cond_resched();
- ptr = shmem_swp_map(subdir);
+ unlock_page(page);
}
- }
- shmem_swp_unmap(ptr);
- return freed;
-}
-
-static void shmem_free_pages(struct list_head *next)
-{
- struct page *page;
- int freed = 0;
-
- do {
- page = container_of(next, struct page, lru);
- next = next->next;
- shmem_dir_free(page);
- freed++;
- if (freed >= LATENCY_LIMIT) {
- cond_resched();
- freed = 0;
- }
- } while (next);
-}
-
-void shmem_truncate_range(struct inode *inode, loff_t start, loff_t end)
-{
- struct shmem_inode_info *info = SHMEM_I(inode);
- unsigned long idx;
- unsigned long size;
- unsigned long limit;
- unsigned long stage;
- unsigned long diroff;
- struct page **dir;
- struct page *topdir;
- struct page *middir;
- struct page *subdir;
- swp_entry_t *ptr;
- LIST_HEAD(pages_to_free);
- long nr_pages_to_free = 0;
- long nr_swaps_freed = 0;
- int offset;
- int freed;
- int punch_hole;
- spinlock_t *needs_lock;
- spinlock_t *punch_lock;
- unsigned long upper_limit;
-
- truncate_inode_pages_range(inode->i_mapping, start, end);
-
- inode->i_ctime = inode->i_mtime = CURRENT_TIME;
- idx = (start + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
- if (idx >= info->next_index)
- return;
-
- spin_lock(&info->lock);
- info->flags |= SHMEM_TRUNCATE;
- if (likely(end == (loff_t) -1)) {
- limit = info->next_index;
- upper_limit = SHMEM_MAX_INDEX;
- info->next_index = idx;
- needs_lock = NULL;
- punch_hole = 0;
- } else {
- if (end + 1 >= inode->i_size) { /* we may free a little more */
- limit = (inode->i_size + PAGE_CACHE_SIZE - 1) >>
- PAGE_CACHE_SHIFT;
- upper_limit = SHMEM_MAX_INDEX;
- } else {
- limit = (end + 1) >> PAGE_CACHE_SHIFT;
- upper_limit = limit;
- }
- needs_lock = &info->lock;
- punch_hole = 1;
- }
-
- topdir = info->i_indirect;
- if (topdir && idx <= SHMEM_NR_DIRECT && !punch_hole) {
- info->i_indirect = NULL;
- nr_pages_to_free++;
- list_add(&topdir->lru, &pages_to_free);
- }
- spin_unlock(&info->lock);
-
- if (info->swapped && idx < SHMEM_NR_DIRECT) {
- ptr = info->i_direct;
- size = limit;
- if (size > SHMEM_NR_DIRECT)
- size = SHMEM_NR_DIRECT;
- nr_swaps_freed = shmem_free_swp(ptr+idx, ptr+size, needs_lock);
- }
-
- /*
- * If there are no indirect blocks or we are punching a hole
- * below indirect blocks, nothing to be done.
- */
- if (!topdir || limit <= SHMEM_NR_DIRECT)
- goto done2;
-
- /*
- * The truncation case has already dropped info->lock, and we're safe
- * because i_size and next_index have already been lowered, preventing
- * access beyond. But in the punch_hole case, we still need to take
- * the lock when updating the swap directory, because there might be
- * racing accesses by shmem_getpage(SGP_CACHE), shmem_unuse_inode or
- * shmem_writepage. However, whenever we find we can remove a whole
- * directory page (not at the misaligned start or end of the range),
- * we first NULLify its pointer in the level above, and then have no
- * need to take the lock when updating its contents: needs_lock and
- * punch_lock (either pointing to info->lock or NULL) manage this.
- */
-
- upper_limit -= SHMEM_NR_DIRECT;
- limit -= SHMEM_NR_DIRECT;
- idx = (idx > SHMEM_NR_DIRECT)? (idx - SHMEM_NR_DIRECT): 0;
- offset = idx % ENTRIES_PER_PAGE;
- idx -= offset;
-
- dir = shmem_dir_map(topdir);
- stage = ENTRIES_PER_PAGEPAGE/2;
- if (idx < ENTRIES_PER_PAGEPAGE/2) {
- middir = topdir;
- diroff = idx/ENTRIES_PER_PAGE;
- } else {
- dir += ENTRIES_PER_PAGE/2;
- dir += (idx - ENTRIES_PER_PAGEPAGE/2)/ENTRIES_PER_PAGEPAGE;
- while (stage <= idx)
- stage += ENTRIES_PER_PAGEPAGE;
- middir = *dir;
- if (*dir) {
- diroff = ((idx - ENTRIES_PER_PAGEPAGE/2) %
- ENTRIES_PER_PAGEPAGE) / ENTRIES_PER_PAGE;
- if (!diroff && !offset && upper_limit >= stage) {
- if (needs_lock) {
- spin_lock(needs_lock);
- *dir = NULL;
- spin_unlock(needs_lock);
- needs_lock = NULL;
- } else
- *dir = NULL;
- nr_pages_to_free++;
- list_add(&middir->lru, &pages_to_free);
- }
- shmem_dir_unmap(dir);
- dir = shmem_dir_map(middir);
- } else {
- diroff = 0;
- offset = 0;
- idx = stage;
- }
- }
-
- for (; idx < limit; idx += ENTRIES_PER_PAGE, diroff++) {
- if (unlikely(idx == stage)) {
- shmem_dir_unmap(dir);
- dir = shmem_dir_map(topdir) +
- ENTRIES_PER_PAGE/2 + idx/ENTRIES_PER_PAGEPAGE;
- while (!*dir) {
- dir++;
- idx += ENTRIES_PER_PAGEPAGE;
- if (idx >= limit)
- goto done1;
- }
- stage = idx + ENTRIES_PER_PAGEPAGE;
- middir = *dir;
- if (punch_hole)
- needs_lock = &info->lock;
- if (upper_limit >= stage) {
- if (needs_lock) {
- spin_lock(needs_lock);
- *dir = NULL;
- spin_unlock(needs_lock);
- needs_lock = NULL;
- } else
- *dir = NULL;
- nr_pages_to_free++;
- list_add(&middir->lru, &pages_to_free);
- }
- shmem_dir_unmap(dir);
- cond_resched();
- dir = shmem_dir_map(middir);
- diroff = 0;
- }
- punch_lock = needs_lock;
- subdir = dir[diroff];
- if (subdir && !offset && upper_limit-idx >= ENTRIES_PER_PAGE) {
- if (needs_lock) {
- spin_lock(needs_lock);
- dir[diroff] = NULL;
- spin_unlock(needs_lock);
- punch_lock = NULL;
- } else
- dir[diroff] = NULL;
- nr_pages_to_free++;
- list_add(&subdir->lru, &pages_to_free);
- }
- if (subdir && page_private(subdir) /* has swap entries */) {
- size = limit - idx;
- if (size > ENTRIES_PER_PAGE)
- size = ENTRIES_PER_PAGE;
- freed = shmem_map_and_free_swp(subdir,
- offset, size, &dir, punch_lock);
- if (!dir)
- dir = shmem_dir_map(middir);
- nr_swaps_freed += freed;
- if (offset || punch_lock) {
- spin_lock(&info->lock);
- set_page_private(subdir,
- page_private(subdir) - freed);
- spin_unlock(&info->lock);
- } else
- BUG_ON(page_private(subdir) != freed);
- }
- offset = 0;
- }
-done1:
- shmem_dir_unmap(dir);
-done2:
- if (inode->i_mapping->nrpages && (info->flags & SHMEM_PAGEIN)) {
- /*
- * Call truncate_inode_pages again: racing shmem_unuse_inode
- * may have swizzled a page in from swap since
- * truncate_pagecache or generic_delete_inode did it, before we
- * lowered next_index. Also, though shmem_getpage checks
- * i_size before adding to cache, no recheck after: so fix the
- * narrow window there too.
- */
- truncate_inode_pages_range(inode->i_mapping, start, end);
+ shmem_pagevec_release(&pvec);
+ mem_cgroup_uncharge_end();
+ index++;
}
spin_lock(&info->lock);
- info->flags &= ~SHMEM_TRUNCATE;
info->swapped -= nr_swaps_freed;
- if (nr_pages_to_free)
- shmem_free_blocks(inode, nr_pages_to_free);
shmem_recalc_inode(inode);
spin_unlock(&info->lock);
- /*
- * Empty swap vector directory pages to be freed?
- */
- if (!list_empty(&pages_to_free)) {
- pages_to_free.prev->next = NULL;
- shmem_free_pages(pages_to_free.next);
- }
+ inode->i_ctime = inode->i_mtime = CURRENT_TIME;
}
EXPORT_SYMBOL_GPL(shmem_truncate_range);
@@ -780,37 +520,7 @@
if (S_ISREG(inode->i_mode) && (attr->ia_valid & ATTR_SIZE)) {
loff_t oldsize = inode->i_size;
loff_t newsize = attr->ia_size;
- struct page *page = NULL;
- if (newsize < oldsize) {
- /*
- * If truncating down to a partial page, then
- * if that page is already allocated, hold it
- * in memory until the truncation is over, so
- * truncate_partial_page cannot miss it were
- * it assigned to swap.
- */
- if (newsize & (PAGE_CACHE_SIZE-1)) {
- (void) shmem_getpage(inode,
- newsize >> PAGE_CACHE_SHIFT,
- &page, SGP_READ, NULL);
- if (page)
- unlock_page(page);
- }
- /*
- * Reset SHMEM_PAGEIN flag so that shmem_truncate can
- * detect if any pages might have been added to cache
- * after truncate_inode_pages. But we needn't bother
- * if it's being fully truncated to zero-length: the
- * nrpages check is efficient enough in that case.
- */
- if (newsize) {
- struct shmem_inode_info *info = SHMEM_I(inode);
- spin_lock(&info->lock);
- info->flags &= ~SHMEM_PAGEIN;
- spin_unlock(&info->lock);
- }
- }
if (newsize != oldsize) {
i_size_write(inode, newsize);
inode->i_ctime = inode->i_mtime = CURRENT_TIME;
@@ -822,8 +532,6 @@
/* unmap again to remove racily COWed private pages */
unmap_mapping_range(inode->i_mapping, holebegin, 0, 1);
}
- if (page)
- page_cache_release(page);
}
setattr_copy(inode, attr);
@@ -848,7 +556,8 @@
list_del_init(&info->swaplist);
mutex_unlock(&shmem_swaplist_mutex);
}
- }
+ } else
+ kfree(info->symlink);
list_for_each_entry_safe(xattr, nxattr, &info->xattr_list, list) {
kfree(xattr->name);
@@ -859,106 +568,27 @@
end_writeback(inode);
}
-static inline int shmem_find_swp(swp_entry_t entry, swp_entry_t *dir, swp_entry_t *edir)
+/*
+ * If swap found in inode, free it and move page from swapcache to filecache.
+ */
+static int shmem_unuse_inode(struct shmem_inode_info *info,
+ swp_entry_t swap, struct page *page)
{
- swp_entry_t *ptr;
-
- for (ptr = dir; ptr < edir; ptr++) {
- if (ptr->val == entry.val)
- return ptr - dir;
- }
- return -1;
-}
-
-static int shmem_unuse_inode(struct shmem_inode_info *info, swp_entry_t entry, struct page *page)
-{
- struct address_space *mapping;
- unsigned long idx;
- unsigned long size;
- unsigned long limit;
- unsigned long stage;
- struct page **dir;
- struct page *subdir;
- swp_entry_t *ptr;
- int offset;
+ struct address_space *mapping = info->vfs_inode.i_mapping;
+ void *radswap;
+ pgoff_t index;
int error;
- idx = 0;
- ptr = info->i_direct;
- spin_lock(&info->lock);
- if (!info->swapped) {
- list_del_init(&info->swaplist);
- goto lost2;
- }
- limit = info->next_index;
- size = limit;
- if (size > SHMEM_NR_DIRECT)
- size = SHMEM_NR_DIRECT;
- offset = shmem_find_swp(entry, ptr, ptr+size);
- if (offset >= 0) {
- shmem_swp_balance_unmap();
- goto found;
- }
- if (!info->i_indirect)
- goto lost2;
-
- dir = shmem_dir_map(info->i_indirect);
- stage = SHMEM_NR_DIRECT + ENTRIES_PER_PAGEPAGE/2;
-
- for (idx = SHMEM_NR_DIRECT; idx < limit; idx += ENTRIES_PER_PAGE, dir++) {
- if (unlikely(idx == stage)) {
- shmem_dir_unmap(dir-1);
- if (cond_resched_lock(&info->lock)) {
- /* check it has not been truncated */
- if (limit > info->next_index) {
- limit = info->next_index;
- if (idx >= limit)
- goto lost2;
- }
- }
- dir = shmem_dir_map(info->i_indirect) +
- ENTRIES_PER_PAGE/2 + idx/ENTRIES_PER_PAGEPAGE;
- while (!*dir) {
- dir++;
- idx += ENTRIES_PER_PAGEPAGE;
- if (idx >= limit)
- goto lost1;
- }
- stage = idx + ENTRIES_PER_PAGEPAGE;
- subdir = *dir;
- shmem_dir_unmap(dir);
- dir = shmem_dir_map(subdir);
- }
- subdir = *dir;
- if (subdir && page_private(subdir)) {
- ptr = shmem_swp_map(subdir);
- size = limit - idx;
- if (size > ENTRIES_PER_PAGE)
- size = ENTRIES_PER_PAGE;
- offset = shmem_find_swp(entry, ptr, ptr+size);
- shmem_swp_unmap(ptr);
- if (offset >= 0) {
- shmem_dir_unmap(dir);
- ptr = shmem_swp_map(subdir);
- goto found;
- }
- }
- }
-lost1:
- shmem_dir_unmap(dir-1);
-lost2:
- spin_unlock(&info->lock);
- return 0;
-found:
- idx += offset;
- ptr += offset;
+ radswap = swp_to_radix_entry(swap);
+ index = radix_tree_locate_item(&mapping->page_tree, radswap);
+ if (index == -1)
+ return 0;
/*
* Move _head_ to start search for next from here.
* But be careful: shmem_evict_inode checks list_empty without taking
* mutex, and there's an instant in list_move_tail when info->swaplist
- * would appear empty, if it were the only one on shmem_swaplist. We
- * could avoid doing it if inode NULL; or use this minor optimization.
+ * would appear empty, if it were the only one on shmem_swaplist.
*/
if (shmem_swaplist.next != &info->swaplist)
list_move_tail(&shmem_swaplist, &info->swaplist);
@@ -968,29 +598,34 @@
* but also to hold up shmem_evict_inode(): so inode cannot be freed
* beneath us (pagelock doesn't help until the page is in pagecache).
*/
- mapping = info->vfs_inode.i_mapping;
- error = add_to_page_cache_locked(page, mapping, idx, GFP_NOWAIT);
+ error = shmem_add_to_page_cache(page, mapping, index,
+ GFP_NOWAIT, radswap);
/* which does mem_cgroup_uncharge_cache_page on error */
if (error != -ENOMEM) {
+ /*
+ * Truncation and eviction use free_swap_and_cache(), which
+ * only does trylock page: if we raced, best clean up here.
+ */
delete_from_swap_cache(page);
set_page_dirty(page);
- info->flags |= SHMEM_PAGEIN;
- shmem_swp_set(info, ptr, 0);
- swap_free(entry);
+ if (!error) {
+ spin_lock(&info->lock);
+ info->swapped--;
+ spin_unlock(&info->lock);
+ swap_free(swap);
+ }
error = 1; /* not an error, but entry was found */
}
- shmem_swp_unmap(ptr);
- spin_unlock(&info->lock);
return error;
}
/*
- * shmem_unuse() search for an eventually swapped out shmem page.
+ * Search through swapped inodes to find and replace swap by page.
*/
-int shmem_unuse(swp_entry_t entry, struct page *page)
+int shmem_unuse(swp_entry_t swap, struct page *page)
{
- struct list_head *p, *next;
+ struct list_head *this, *next;
struct shmem_inode_info *info;
int found = 0;
int error;
@@ -999,32 +634,25 @@
* Charge page using GFP_KERNEL while we can wait, before taking
* the shmem_swaplist_mutex which might hold up shmem_writepage().
* Charged back to the user (not to caller) when swap account is used.
- * add_to_page_cache() will be called with GFP_NOWAIT.
*/
error = mem_cgroup_cache_charge(page, current->mm, GFP_KERNEL);
if (error)
goto out;
- /*
- * Try to preload while we can wait, to not make a habit of
- * draining atomic reserves; but don't latch on to this cpu,
- * it's okay if sometimes we get rescheduled after this.
- */
- error = radix_tree_preload(GFP_KERNEL);
- if (error)
- goto uncharge;
- radix_tree_preload_end();
+ /* No radix_tree_preload: swap entry keeps a place for page in tree */
mutex_lock(&shmem_swaplist_mutex);
- list_for_each_safe(p, next, &shmem_swaplist) {
- info = list_entry(p, struct shmem_inode_info, swaplist);
- found = shmem_unuse_inode(info, entry, page);
+ list_for_each_safe(this, next, &shmem_swaplist) {
+ info = list_entry(this, struct shmem_inode_info, swaplist);
+ if (info->swapped)
+ found = shmem_unuse_inode(info, swap, page);
+ else
+ list_del_init(&info->swaplist);
cond_resched();
if (found)
break;
}
mutex_unlock(&shmem_swaplist_mutex);
-uncharge:
if (!found)
mem_cgroup_uncharge_cache_page(page);
if (found < 0)
@@ -1041,10 +669,10 @@
static int shmem_writepage(struct page *page, struct writeback_control *wbc)
{
struct shmem_inode_info *info;
- swp_entry_t *entry, swap;
struct address_space *mapping;
- unsigned long index;
struct inode *inode;
+ swp_entry_t swap;
+ pgoff_t index;
BUG_ON(!PageLocked(page));
mapping = page->mapping;
@@ -1073,50 +701,32 @@
/*
* Add inode to shmem_unuse()'s list of swapped-out inodes,
- * if it's not already there. Do it now because we cannot take
- * mutex while holding spinlock, and must do so before the page
- * is moved to swap cache, when its pagelock no longer protects
+ * if it's not already there. Do it now before the page is
+ * moved to swap cache, when its pagelock no longer protects
* the inode from eviction. But don't unlock the mutex until
- * we've taken the spinlock, because shmem_unuse_inode() will
- * prune a !swapped inode from the swaplist under both locks.
+ * we've incremented swapped, because shmem_unuse_inode() will
+ * prune a !swapped inode from the swaplist under this mutex.
*/
mutex_lock(&shmem_swaplist_mutex);
if (list_empty(&info->swaplist))
list_add_tail(&info->swaplist, &shmem_swaplist);
- spin_lock(&info->lock);
- mutex_unlock(&shmem_swaplist_mutex);
-
- if (index >= info->next_index) {
- BUG_ON(!(info->flags & SHMEM_TRUNCATE));
- goto unlock;
- }
- entry = shmem_swp_entry(info, index, NULL);
- if (entry->val) {
- WARN_ON_ONCE(1); /* Still happens? Tell us about it! */
- free_swap_and_cache(*entry);
- shmem_swp_set(info, entry, 0);
- }
- shmem_recalc_inode(inode);
-
if (add_to_swap_cache(page, swap, GFP_ATOMIC) == 0) {
- delete_from_page_cache(page);
- shmem_swp_set(info, entry, swap.val);
- shmem_swp_unmap(entry);
swap_shmem_alloc(swap);
+ shmem_delete_from_page_cache(page, swp_to_radix_entry(swap));
+
+ spin_lock(&info->lock);
+ info->swapped++;
+ shmem_recalc_inode(inode);
spin_unlock(&info->lock);
+
+ mutex_unlock(&shmem_swaplist_mutex);
BUG_ON(page_mapped(page));
swap_writepage(page, wbc);
return 0;
}
- shmem_swp_unmap(entry);
-unlock:
- spin_unlock(&info->lock);
- /*
- * add_to_swap_cache() doesn't return -EEXIST, so we can safely
- * clear SWAP_HAS_CACHE flag.
- */
+ mutex_unlock(&shmem_swaplist_mutex);
swapcache_free(swap, NULL);
redirty:
set_page_dirty(page);
@@ -1153,35 +763,33 @@
}
#endif /* CONFIG_TMPFS */
-static struct page *shmem_swapin(swp_entry_t entry, gfp_t gfp,
- struct shmem_inode_info *info, unsigned long idx)
+static struct page *shmem_swapin(swp_entry_t swap, gfp_t gfp,
+ struct shmem_inode_info *info, pgoff_t index)
{
struct mempolicy mpol, *spol;
struct vm_area_struct pvma;
- struct page *page;
spol = mpol_cond_copy(&mpol,
- mpol_shared_policy_lookup(&info->policy, idx));
+ mpol_shared_policy_lookup(&info->policy, index));
/* Create a pseudo vma that just contains the policy */
pvma.vm_start = 0;
- pvma.vm_pgoff = idx;
+ pvma.vm_pgoff = index;
pvma.vm_ops = NULL;
pvma.vm_policy = spol;
- page = swapin_readahead(entry, gfp, &pvma, 0);
- return page;
+ return swapin_readahead(swap, gfp, &pvma, 0);
}
static struct page *shmem_alloc_page(gfp_t gfp,
- struct shmem_inode_info *info, unsigned long idx)
+ struct shmem_inode_info *info, pgoff_t index)
{
struct vm_area_struct pvma;
/* Create a pseudo vma that just contains the policy */
pvma.vm_start = 0;
- pvma.vm_pgoff = idx;
+ pvma.vm_pgoff = index;
pvma.vm_ops = NULL;
- pvma.vm_policy = mpol_shared_policy_lookup(&info->policy, idx);
+ pvma.vm_policy = mpol_shared_policy_lookup(&info->policy, index);
/*
* alloc_page_vma() will drop the shared policy reference
@@ -1190,19 +798,19 @@
}
#else /* !CONFIG_NUMA */
#ifdef CONFIG_TMPFS
-static inline void shmem_show_mpol(struct seq_file *seq, struct mempolicy *p)
+static inline void shmem_show_mpol(struct seq_file *seq, struct mempolicy *mpol)
{
}
#endif /* CONFIG_TMPFS */
-static inline struct page *shmem_swapin(swp_entry_t entry, gfp_t gfp,
- struct shmem_inode_info *info, unsigned long idx)
+static inline struct page *shmem_swapin(swp_entry_t swap, gfp_t gfp,
+ struct shmem_inode_info *info, pgoff_t index)
{
- return swapin_readahead(entry, gfp, NULL, 0);
+ return swapin_readahead(swap, gfp, NULL, 0);
}
static inline struct page *shmem_alloc_page(gfp_t gfp,
- struct shmem_inode_info *info, unsigned long idx)
+ struct shmem_inode_info *info, pgoff_t index)
{
return alloc_page(gfp);
}
@@ -1222,243 +830,190 @@
* vm. If we swap it in we mark it dirty since we also free the swap
* entry since a page cannot live in both the swap and page cache
*/
-static int shmem_getpage_gfp(struct inode *inode, pgoff_t idx,
+static int shmem_getpage_gfp(struct inode *inode, pgoff_t index,
struct page **pagep, enum sgp_type sgp, gfp_t gfp, int *fault_type)
{
struct address_space *mapping = inode->i_mapping;
- struct shmem_inode_info *info = SHMEM_I(inode);
+ struct shmem_inode_info *info;
struct shmem_sb_info *sbinfo;
struct page *page;
- struct page *prealloc_page = NULL;
- swp_entry_t *entry;
swp_entry_t swap;
int error;
- int ret;
+ int once = 0;
- if (idx >= SHMEM_MAX_INDEX)
+ if (index > (MAX_LFS_FILESIZE >> PAGE_CACHE_SHIFT))
return -EFBIG;
repeat:
- page = find_lock_page(mapping, idx);
- if (page) {
+ swap.val = 0;
+ page = find_lock_page(mapping, index);
+ if (radix_tree_exceptional_entry(page)) {
+ swap = radix_to_swp_entry(page);
+ page = NULL;
+ }
+
+ if (sgp != SGP_WRITE &&
+ ((loff_t)index << PAGE_CACHE_SHIFT) >= i_size_read(inode)) {
+ error = -EINVAL;
+ goto failed;
+ }
+
+ if (page || (sgp == SGP_READ && !swap.val)) {
/*
* Once we can get the page lock, it must be uptodate:
* if there were an error in reading back from swap,
* the page would not be inserted into the filecache.
*/
- BUG_ON(!PageUptodate(page));
- goto done;
+ BUG_ON(page && !PageUptodate(page));
+ *pagep = page;
+ return 0;
}
/*
- * Try to preload while we can wait, to not make a habit of
- * draining atomic reserves; but don't latch on to this cpu.
+ * Fast cache lookup did not find it:
+ * bring it back from swap or allocate.
*/
- error = radix_tree_preload(gfp & GFP_RECLAIM_MASK);
- if (error)
- goto out;
- radix_tree_preload_end();
-
- if (sgp != SGP_READ && !prealloc_page) {
- prealloc_page = shmem_alloc_page(gfp, info, idx);
- if (prealloc_page) {
- SetPageSwapBacked(prealloc_page);
- if (mem_cgroup_cache_charge(prealloc_page,
- current->mm, GFP_KERNEL)) {
- page_cache_release(prealloc_page);
- prealloc_page = NULL;
- }
- }
- }
-
- spin_lock(&info->lock);
- shmem_recalc_inode(inode);
- entry = shmem_swp_alloc(info, idx, sgp, gfp);
- if (IS_ERR(entry)) {
- spin_unlock(&info->lock);
- error = PTR_ERR(entry);
- goto out;
- }
- swap = *entry;
+ info = SHMEM_I(inode);
+ sbinfo = SHMEM_SB(inode->i_sb);
if (swap.val) {
/* Look it up and read it in.. */
page = lookup_swap_cache(swap);
if (!page) {
- shmem_swp_unmap(entry);
- spin_unlock(&info->lock);
/* here we actually do the io */
if (fault_type)
*fault_type |= VM_FAULT_MAJOR;
- page = shmem_swapin(swap, gfp, info, idx);
+ page = shmem_swapin(swap, gfp, info, index);
if (!page) {
- spin_lock(&info->lock);
- entry = shmem_swp_alloc(info, idx, sgp, gfp);
- if (IS_ERR(entry))
- error = PTR_ERR(entry);
- else {
- if (entry->val == swap.val)
- error = -ENOMEM;
- shmem_swp_unmap(entry);
- }
- spin_unlock(&info->lock);
- if (error)
- goto out;
- goto repeat;
+ error = -ENOMEM;
+ goto failed;
}
- wait_on_page_locked(page);
- page_cache_release(page);
- goto repeat;
}
/* We have to do this with page locked to prevent races */
- if (!trylock_page(page)) {
- shmem_swp_unmap(entry);
- spin_unlock(&info->lock);
- wait_on_page_locked(page);
- page_cache_release(page);
- goto repeat;
- }
- if (PageWriteback(page)) {
- shmem_swp_unmap(entry);
- spin_unlock(&info->lock);
- wait_on_page_writeback(page);
- unlock_page(page);
- page_cache_release(page);
- goto repeat;
- }
+ lock_page(page);
if (!PageUptodate(page)) {
- shmem_swp_unmap(entry);
- spin_unlock(&info->lock);
- unlock_page(page);
- page_cache_release(page);
error = -EIO;
- goto out;
+ goto failed;
+ }
+ wait_on_page_writeback(page);
+
+ /* Someone may have already done it for us */
+ if (page->mapping) {
+ if (page->mapping == mapping &&
+ page->index == index)
+ goto done;
+ error = -EEXIST;
+ goto failed;
}
- error = add_to_page_cache_locked(page, mapping,
- idx, GFP_NOWAIT);
- if (error) {
- shmem_swp_unmap(entry);
- spin_unlock(&info->lock);
- if (error == -ENOMEM) {
- /*
- * reclaim from proper memory cgroup and
- * call memcg's OOM if needed.
- */
- error = mem_cgroup_shmem_charge_fallback(
- page, current->mm, gfp);
- if (error) {
- unlock_page(page);
- page_cache_release(page);
- goto out;
- }
- }
- unlock_page(page);
- page_cache_release(page);
- goto repeat;
- }
+ error = mem_cgroup_cache_charge(page, current->mm,
+ gfp & GFP_RECLAIM_MASK);
+ if (!error)
+ error = shmem_add_to_page_cache(page, mapping, index,
+ gfp, swp_to_radix_entry(swap));
+ if (error)
+ goto failed;
- info->flags |= SHMEM_PAGEIN;
- shmem_swp_set(info, entry, 0);
- shmem_swp_unmap(entry);
- delete_from_swap_cache(page);
+ spin_lock(&info->lock);
+ info->swapped--;
+ shmem_recalc_inode(inode);
spin_unlock(&info->lock);
+
+ delete_from_swap_cache(page);
set_page_dirty(page);
swap_free(swap);
- } else if (sgp == SGP_READ) {
- shmem_swp_unmap(entry);
- page = find_get_page(mapping, idx);
- if (page && !trylock_page(page)) {
- spin_unlock(&info->lock);
- wait_on_page_locked(page);
- page_cache_release(page);
- goto repeat;
+ } else {
+ if (shmem_acct_block(info->flags)) {
+ error = -ENOSPC;
+ goto failed;
}
- spin_unlock(&info->lock);
-
- } else if (prealloc_page) {
- shmem_swp_unmap(entry);
- sbinfo = SHMEM_SB(inode->i_sb);
if (sbinfo->max_blocks) {
if (percpu_counter_compare(&sbinfo->used_blocks,
- sbinfo->max_blocks) >= 0 ||
- shmem_acct_block(info->flags))
- goto nospace;
+ sbinfo->max_blocks) >= 0) {
+ error = -ENOSPC;
+ goto unacct;
+ }
percpu_counter_inc(&sbinfo->used_blocks);
- inode->i_blocks += BLOCKS_PER_PAGE;
- } else if (shmem_acct_block(info->flags))
- goto nospace;
-
- page = prealloc_page;
- prealloc_page = NULL;
-
- entry = shmem_swp_alloc(info, idx, sgp, gfp);
- if (IS_ERR(entry))
- error = PTR_ERR(entry);
- else {
- swap = *entry;
- shmem_swp_unmap(entry);
- }
- ret = error || swap.val;
- if (ret)
- mem_cgroup_uncharge_cache_page(page);
- else
- ret = add_to_page_cache_lru(page, mapping,
- idx, GFP_NOWAIT);
- /*
- * At add_to_page_cache_lru() failure,
- * uncharge will be done automatically.
- */
- if (ret) {
- shmem_unacct_blocks(info->flags, 1);
- shmem_free_blocks(inode, 1);
- spin_unlock(&info->lock);
- page_cache_release(page);
- if (error)
- goto out;
- goto repeat;
}
- info->flags |= SHMEM_PAGEIN;
+ page = shmem_alloc_page(gfp, info, index);
+ if (!page) {
+ error = -ENOMEM;
+ goto decused;
+ }
+
+ SetPageSwapBacked(page);
+ __set_page_locked(page);
+ error = mem_cgroup_cache_charge(page, current->mm,
+ gfp & GFP_RECLAIM_MASK);
+ if (!error)
+ error = shmem_add_to_page_cache(page, mapping, index,
+ gfp, NULL);
+ if (error)
+ goto decused;
+ lru_cache_add_anon(page);
+
+ spin_lock(&info->lock);
info->alloced++;
+ inode->i_blocks += BLOCKS_PER_PAGE;
+ shmem_recalc_inode(inode);
spin_unlock(&info->lock);
+
clear_highpage(page);
flush_dcache_page(page);
SetPageUptodate(page);
if (sgp == SGP_DIRTY)
set_page_dirty(page);
-
- } else {
- spin_unlock(&info->lock);
- error = -ENOMEM;
- goto out;
}
done:
- *pagep = page;
- error = 0;
-out:
- if (prealloc_page) {
- mem_cgroup_uncharge_cache_page(prealloc_page);
- page_cache_release(prealloc_page);
+ /* Perhaps the file has been truncated since we checked */
+ if (sgp != SGP_WRITE &&
+ ((loff_t)index << PAGE_CACHE_SHIFT) >= i_size_read(inode)) {
+ error = -EINVAL;
+ goto trunc;
}
- return error;
+ *pagep = page;
+ return 0;
-nospace:
/*
- * Perhaps the page was brought in from swap between find_lock_page
- * and taking info->lock? We allow for that at add_to_page_cache_lru,
- * but must also avoid reporting a spurious ENOSPC while working on a
- * full tmpfs.
+ * Error recovery.
*/
- page = find_get_page(mapping, idx);
+trunc:
+ ClearPageDirty(page);
+ delete_from_page_cache(page);
+ spin_lock(&info->lock);
+ info->alloced--;
+ inode->i_blocks -= BLOCKS_PER_PAGE;
spin_unlock(&info->lock);
+decused:
+ if (sbinfo->max_blocks)
+ percpu_counter_add(&sbinfo->used_blocks, -1);
+unacct:
+ shmem_unacct_blocks(info->flags, 1);
+failed:
+ if (swap.val && error != -EINVAL) {
+ struct page *test = find_get_page(mapping, index);
+ if (test && !radix_tree_exceptional_entry(test))
+ page_cache_release(test);
+ /* Have another try if the entry has changed */
+ if (test != swp_to_radix_entry(swap))
+ error = -EEXIST;
+ }
if (page) {
+ unlock_page(page);
page_cache_release(page);
+ }
+ if (error == -ENOSPC && !once++) {
+ info = SHMEM_I(inode);
+ spin_lock(&info->lock);
+ shmem_recalc_inode(inode);
+ spin_unlock(&info->lock);
goto repeat;
}
- error = -ENOSPC;
- goto out;
+ if (error == -EEXIST)
+ goto repeat;
+ return error;
}
static int shmem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
@@ -1467,9 +1022,6 @@
int error;
int ret = VM_FAULT_LOCKED;
- if (((loff_t)vmf->pgoff << PAGE_CACHE_SHIFT) >= i_size_read(inode))
- return VM_FAULT_SIGBUS;
-
error = shmem_getpage(inode, vmf->pgoff, &vmf->page, SGP_CACHE, &ret);
if (error)
return ((error == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS);
@@ -1482,20 +1034,20 @@
}
#ifdef CONFIG_NUMA
-static int shmem_set_policy(struct vm_area_struct *vma, struct mempolicy *new)
+static int shmem_set_policy(struct vm_area_struct *vma, struct mempolicy *mpol)
{
- struct inode *i = vma->vm_file->f_path.dentry->d_inode;
- return mpol_set_shared_policy(&SHMEM_I(i)->policy, vma, new);
+ struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+ return mpol_set_shared_policy(&SHMEM_I(inode)->policy, vma, mpol);
}
static struct mempolicy *shmem_get_policy(struct vm_area_struct *vma,
unsigned long addr)
{
- struct inode *i = vma->vm_file->f_path.dentry->d_inode;
- unsigned long idx;
+ struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+ pgoff_t index;
- idx = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
- return mpol_shared_policy_lookup(&SHMEM_I(i)->policy, idx);
+ index = ((addr - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
+ return mpol_shared_policy_lookup(&SHMEM_I(inode)->policy, index);
}
#endif
@@ -1593,7 +1145,7 @@
#ifdef CONFIG_TMPFS
static const struct inode_operations shmem_symlink_inode_operations;
-static const struct inode_operations shmem_symlink_inline_operations;
+static const struct inode_operations shmem_short_symlink_operations;
static int
shmem_write_begin(struct file *file, struct address_space *mapping,
@@ -1626,7 +1178,8 @@
{
struct inode *inode = filp->f_path.dentry->d_inode;
struct address_space *mapping = inode->i_mapping;
- unsigned long index, offset;
+ pgoff_t index;
+ unsigned long offset;
enum sgp_type sgp = SGP_READ;
/*
@@ -1642,7 +1195,8 @@
for (;;) {
struct page *page = NULL;
- unsigned long end_index, nr, ret;
+ pgoff_t end_index;
+ unsigned long nr, ret;
loff_t i_size = i_size_read(inode);
end_index = i_size >> PAGE_CACHE_SHIFT;
@@ -1880,8 +1434,9 @@
buf->f_namelen = NAME_MAX;
if (sbinfo->max_blocks) {
buf->f_blocks = sbinfo->max_blocks;
- buf->f_bavail = buf->f_bfree =
- sbinfo->max_blocks - percpu_counter_sum(&sbinfo->used_blocks);
+ buf->f_bavail =
+ buf->f_bfree = sbinfo->max_blocks -
+ percpu_counter_sum(&sbinfo->used_blocks);
}
if (sbinfo->max_inodes) {
buf->f_files = sbinfo->max_inodes;
@@ -2055,10 +1610,13 @@
info = SHMEM_I(inode);
inode->i_size = len-1;
- if (len <= SHMEM_SYMLINK_INLINE_LEN) {
- /* do it inline */
- memcpy(info->inline_symlink, symname, len);
- inode->i_op = &shmem_symlink_inline_operations;
+ if (len <= SHORT_SYMLINK_LEN) {
+ info->symlink = kmemdup(symname, len, GFP_KERNEL);
+ if (!info->symlink) {
+ iput(inode);
+ return -ENOMEM;
+ }
+ inode->i_op = &shmem_short_symlink_operations;
} else {
error = shmem_getpage(inode, 0, &page, SGP_WRITE, NULL);
if (error) {
@@ -2081,17 +1639,17 @@
return 0;
}
-static void *shmem_follow_link_inline(struct dentry *dentry, struct nameidata *nd)
+static void *shmem_follow_short_symlink(struct dentry *dentry, struct nameidata *nd)
{
- nd_set_link(nd, SHMEM_I(dentry->d_inode)->inline_symlink);
+ nd_set_link(nd, SHMEM_I(dentry->d_inode)->symlink);
return NULL;
}
static void *shmem_follow_link(struct dentry *dentry, struct nameidata *nd)
{
struct page *page = NULL;
- int res = shmem_getpage(dentry->d_inode, 0, &page, SGP_READ, NULL);
- nd_set_link(nd, res ? ERR_PTR(res) : kmap(page));
+ int error = shmem_getpage(dentry->d_inode, 0, &page, SGP_READ, NULL);
+ nd_set_link(nd, error ? ERR_PTR(error) : kmap(page));
if (page)
unlock_page(page);
return page;
@@ -2202,7 +1760,6 @@
return err;
}
-
static const struct xattr_handler *shmem_xattr_handlers[] = {
#ifdef CONFIG_TMPFS_POSIX_ACL
&generic_acl_access_handler,
@@ -2332,9 +1889,9 @@
}
#endif /* CONFIG_TMPFS_XATTR */
-static const struct inode_operations shmem_symlink_inline_operations = {
+static const struct inode_operations shmem_short_symlink_operations = {
.readlink = generic_readlink,
- .follow_link = shmem_follow_link_inline,
+ .follow_link = shmem_follow_short_symlink,
#ifdef CONFIG_TMPFS_XATTR
.setxattr = shmem_setxattr,
.getxattr = shmem_getxattr,
@@ -2534,8 +2091,7 @@
if (config.max_inodes < inodes)
goto out;
/*
- * Those tests also disallow limited->unlimited while any are in
- * use, so i_blocks will always be zero when max_blocks is zero;
+ * Those tests disallow limited->unlimited while any are in use;
* but we must separately disallow unlimited->limited, because
* in that case we have no record of how much is already in use.
*/
@@ -2627,7 +2183,7 @@
goto failed;
sbinfo->free_inodes = sbinfo->max_inodes;
- sb->s_maxbytes = SHMEM_MAX_BYTES;
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = TMPFS_MAGIC;
@@ -2662,14 +2218,14 @@
static struct inode *shmem_alloc_inode(struct super_block *sb)
{
- struct shmem_inode_info *p;
- p = (struct shmem_inode_info *)kmem_cache_alloc(shmem_inode_cachep, GFP_KERNEL);
- if (!p)
+ struct shmem_inode_info *info;
+ info = kmem_cache_alloc(shmem_inode_cachep, GFP_KERNEL);
+ if (!info)
return NULL;
- return &p->vfs_inode;
+ return &info->vfs_inode;
}
-static void shmem_i_callback(struct rcu_head *head)
+static void shmem_destroy_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
@@ -2678,29 +2234,26 @@
static void shmem_destroy_inode(struct inode *inode)
{
- if ((inode->i_mode & S_IFMT) == S_IFREG) {
- /* only struct inode is valid if it's an inline symlink */
+ if ((inode->i_mode & S_IFMT) == S_IFREG)
mpol_free_shared_policy(&SHMEM_I(inode)->policy);
- }
- call_rcu(&inode->i_rcu, shmem_i_callback);
+ call_rcu(&inode->i_rcu, shmem_destroy_callback);
}
-static void init_once(void *foo)
+static void shmem_init_inode(void *foo)
{
- struct shmem_inode_info *p = (struct shmem_inode_info *) foo;
-
- inode_init_once(&p->vfs_inode);
+ struct shmem_inode_info *info = foo;
+ inode_init_once(&info->vfs_inode);
}
-static int init_inodecache(void)
+static int shmem_init_inodecache(void)
{
shmem_inode_cachep = kmem_cache_create("shmem_inode_cache",
sizeof(struct shmem_inode_info),
- 0, SLAB_PANIC, init_once);
+ 0, SLAB_PANIC, shmem_init_inode);
return 0;
}
-static void destroy_inodecache(void)
+static void shmem_destroy_inodecache(void)
{
kmem_cache_destroy(shmem_inode_cachep);
}
@@ -2797,21 +2350,20 @@
#endif
};
-
static struct dentry *shmem_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
return mount_nodev(fs_type, flags, data, shmem_fill_super);
}
-static struct file_system_type tmpfs_fs_type = {
+static struct file_system_type shmem_fs_type = {
.owner = THIS_MODULE,
.name = "tmpfs",
.mount = shmem_mount,
.kill_sb = kill_litter_super,
};
-int __init init_tmpfs(void)
+int __init shmem_init(void)
{
int error;
@@ -2819,18 +2371,18 @@
if (error)
goto out4;
- error = init_inodecache();
+ error = shmem_init_inodecache();
if (error)
goto out3;
- error = register_filesystem(&tmpfs_fs_type);
+ error = register_filesystem(&shmem_fs_type);
if (error) {
printk(KERN_ERR "Could not register tmpfs\n");
goto out2;
}
- shm_mnt = vfs_kern_mount(&tmpfs_fs_type, MS_NOUSER,
- tmpfs_fs_type.name, NULL);
+ shm_mnt = vfs_kern_mount(&shmem_fs_type, MS_NOUSER,
+ shmem_fs_type.name, NULL);
if (IS_ERR(shm_mnt)) {
error = PTR_ERR(shm_mnt);
printk(KERN_ERR "Could not kern_mount tmpfs\n");
@@ -2839,9 +2391,9 @@
return 0;
out1:
- unregister_filesystem(&tmpfs_fs_type);
+ unregister_filesystem(&shmem_fs_type);
out2:
- destroy_inodecache();
+ shmem_destroy_inodecache();
out3:
bdi_destroy(&shmem_backing_dev_info);
out4:
@@ -2849,45 +2401,6 @@
return error;
}
-#ifdef CONFIG_CGROUP_MEM_RES_CTLR
-/**
- * mem_cgroup_get_shmem_target - find a page or entry assigned to the shmem file
- * @inode: the inode to be searched
- * @pgoff: the offset to be searched
- * @pagep: the pointer for the found page to be stored
- * @ent: the pointer for the found swap entry to be stored
- *
- * If a page is found, refcount of it is incremented. Callers should handle
- * these refcount.
- */
-void mem_cgroup_get_shmem_target(struct inode *inode, pgoff_t pgoff,
- struct page **pagep, swp_entry_t *ent)
-{
- swp_entry_t entry = { .val = 0 }, *ptr;
- struct page *page = NULL;
- struct shmem_inode_info *info = SHMEM_I(inode);
-
- if ((pgoff << PAGE_CACHE_SHIFT) >= i_size_read(inode))
- goto out;
-
- spin_lock(&info->lock);
- ptr = shmem_swp_entry(info, pgoff, NULL);
-#ifdef CONFIG_SWAP
- if (ptr && ptr->val) {
- entry.val = ptr->val;
- page = find_get_page(&swapper_space, entry.val);
- } else
-#endif
- page = find_get_page(inode->i_mapping, pgoff);
- if (ptr)
- shmem_swp_unmap(ptr);
- spin_unlock(&info->lock);
-out:
- *pagep = page;
- *ent = entry;
-}
-#endif
-
#else /* !CONFIG_SHMEM */
/*
@@ -2901,23 +2414,23 @@
#include <linux/ramfs.h>
-static struct file_system_type tmpfs_fs_type = {
+static struct file_system_type shmem_fs_type = {
.name = "tmpfs",
.mount = ramfs_mount,
.kill_sb = kill_litter_super,
};
-int __init init_tmpfs(void)
+int __init shmem_init(void)
{
- BUG_ON(register_filesystem(&tmpfs_fs_type) != 0);
+ BUG_ON(register_filesystem(&shmem_fs_type) != 0);
- shm_mnt = kern_mount(&tmpfs_fs_type);
+ shm_mnt = kern_mount(&shmem_fs_type);
BUG_ON(IS_ERR(shm_mnt));
return 0;
}
-int shmem_unuse(swp_entry_t entry, struct page *page)
+int shmem_unuse(swp_entry_t swap, struct page *page)
{
return 0;
}
@@ -2927,43 +2440,17 @@
return 0;
}
-void shmem_truncate_range(struct inode *inode, loff_t start, loff_t end)
+void shmem_truncate_range(struct inode *inode, loff_t lstart, loff_t lend)
{
- truncate_inode_pages_range(inode->i_mapping, start, end);
+ truncate_inode_pages_range(inode->i_mapping, lstart, lend);
}
EXPORT_SYMBOL_GPL(shmem_truncate_range);
-#ifdef CONFIG_CGROUP_MEM_RES_CTLR
-/**
- * mem_cgroup_get_shmem_target - find a page or entry assigned to the shmem file
- * @inode: the inode to be searched
- * @pgoff: the offset to be searched
- * @pagep: the pointer for the found page to be stored
- * @ent: the pointer for the found swap entry to be stored
- *
- * If a page is found, refcount of it is incremented. Callers should handle
- * these refcount.
- */
-void mem_cgroup_get_shmem_target(struct inode *inode, pgoff_t pgoff,
- struct page **pagep, swp_entry_t *ent)
-{
- struct page *page = NULL;
-
- if ((pgoff << PAGE_CACHE_SHIFT) >= i_size_read(inode))
- goto out;
- page = find_get_page(inode->i_mapping, pgoff);
-out:
- *pagep = page;
- *ent = (swp_entry_t){ .val = 0 };
-}
-#endif
-
#define shmem_vm_ops generic_file_vm_ops
#define shmem_file_operations ramfs_file_operations
#define shmem_get_inode(sb, dir, mode, dev, flags) ramfs_get_inode(sb, dir, mode, dev)
#define shmem_acct_size(flags, size) 0
#define shmem_unacct_size(flags, size) do {} while (0)
-#define SHMEM_MAX_BYTES MAX_LFS_FILESIZE
#endif /* CONFIG_SHMEM */
@@ -2987,7 +2474,7 @@
if (IS_ERR(shm_mnt))
return (void *)shm_mnt;
- if (size < 0 || size > SHMEM_MAX_BYTES)
+ if (size < 0 || size > MAX_LFS_FILESIZE)
return ERR_PTR(-EINVAL);
if (shmem_acct_size(flags, size))
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 1b8c339..17bc224 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1924,20 +1924,24 @@
/*
* Find out how many pages are allowed for a single swap
- * device. There are two limiting factors: 1) the number of
- * bits for the swap offset in the swp_entry_t type and
- * 2) the number of bits in the a swap pte as defined by
- * the different architectures. In order to find the
- * largest possible bit mask a swap entry with swap type 0
+ * device. There are three limiting factors: 1) the number
+ * of bits for the swap offset in the swp_entry_t type, and
+ * 2) the number of bits in the swap pte as defined by the
+ * the different architectures, and 3) the number of free bits
+ * in an exceptional radix_tree entry. In order to find the
+ * largest possible bit mask, a swap entry with swap type 0
* and swap offset ~0UL is created, encoded to a swap pte,
- * decoded to a swp_entry_t again and finally the swap
+ * decoded to a swp_entry_t again, and finally the swap
* offset is extracted. This will mask all the bits from
* the initial ~0UL mask that can't be encoded in either
* the swp_entry_t or the architecture definition of a
- * swap pte.
+ * swap pte. Then the same is done for a radix_tree entry.
*/
maxpages = swp_offset(pte_to_swp_entry(
- swp_entry_to_pte(swp_entry(0, ~0UL)))) + 1;
+ swp_entry_to_pte(swp_entry(0, ~0UL))));
+ maxpages = swp_offset(radix_to_swp_entry(
+ swp_to_radix_entry(swp_entry(0, maxpages)))) + 1;
+
if (maxpages > swap_header->info.last_page) {
maxpages = swap_header->info.last_page + 1;
/* p->max is an unsigned int: don't overflow it */
diff --git a/mm/truncate.c b/mm/truncate.c
index 232eb27..b40ac6d 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -336,6 +336,14 @@
unsigned long count = 0;
int i;
+ /*
+ * Note: this function may get called on a shmem/tmpfs mapping:
+ * pagevec_lookup() might then return 0 prematurely (because it
+ * got a gangful of swap entries); but it's hardly worth worrying
+ * about - it can rarely have anything to free from such a mapping
+ * (most pages are dirty), and already skips over any difficulties.
+ */
+
pagevec_init(&pvec, 0);
while (index <= end && pagevec_lookup(&pvec, mapping, index,
min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1)) {
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index 6d8ef4a..8b2d37b 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -128,34 +128,34 @@
void print_header(void)
{
if (show_pkg)
- fprintf(stderr, "pkg ");
+ fprintf(stderr, "pk");
if (show_core)
- fprintf(stderr, "core");
+ fprintf(stderr, " cr");
if (show_cpu)
fprintf(stderr, " CPU");
if (do_nhm_cstates)
- fprintf(stderr, " %%c0 ");
+ fprintf(stderr, " %%c0 ");
if (has_aperf)
- fprintf(stderr, " GHz");
+ fprintf(stderr, " GHz");
fprintf(stderr, " TSC");
if (do_nhm_cstates)
- fprintf(stderr, " %%c1 ");
+ fprintf(stderr, " %%c1");
if (do_nhm_cstates)
- fprintf(stderr, " %%c3 ");
+ fprintf(stderr, " %%c3");
if (do_nhm_cstates)
- fprintf(stderr, " %%c6 ");
+ fprintf(stderr, " %%c6");
if (do_snb_cstates)
- fprintf(stderr, " %%c7 ");
+ fprintf(stderr, " %%c7");
if (do_snb_cstates)
- fprintf(stderr, " %%pc2 ");
+ fprintf(stderr, " %%pc2");
if (do_nhm_cstates)
- fprintf(stderr, " %%pc3 ");
+ fprintf(stderr, " %%pc3");
if (do_nhm_cstates)
- fprintf(stderr, " %%pc6 ");
+ fprintf(stderr, " %%pc6");
if (do_snb_cstates)
- fprintf(stderr, " %%pc7 ");
+ fprintf(stderr, " %%pc7");
if (extra_msr_offset)
- fprintf(stderr, " MSR 0x%x ", extra_msr_offset);
+ fprintf(stderr, " MSR 0x%x ", extra_msr_offset);
putc('\n', stderr);
}
@@ -194,14 +194,14 @@
/* topology columns, print blanks on 1st (average) line */
if (p == cnt_average) {
if (show_pkg)
- fprintf(stderr, " ");
+ fprintf(stderr, " ");
if (show_core)
fprintf(stderr, " ");
if (show_cpu)
fprintf(stderr, " ");
} else {
if (show_pkg)
- fprintf(stderr, "%4d", p->pkg);
+ fprintf(stderr, "%d", p->pkg);
if (show_core)
fprintf(stderr, "%4d", p->core);
if (show_cpu)
@@ -241,22 +241,22 @@
if (!skip_c1)
fprintf(stderr, "%7.2f", 100.0 * p->c1/p->tsc);
else
- fprintf(stderr, " ****");
+ fprintf(stderr, " ****");
}
if (do_nhm_cstates)
- fprintf(stderr, "%7.2f", 100.0 * p->c3/p->tsc);
+ fprintf(stderr, " %6.2f", 100.0 * p->c3/p->tsc);
if (do_nhm_cstates)
- fprintf(stderr, "%7.2f", 100.0 * p->c6/p->tsc);
+ fprintf(stderr, " %6.2f", 100.0 * p->c6/p->tsc);
if (do_snb_cstates)
- fprintf(stderr, "%7.2f", 100.0 * p->c7/p->tsc);
+ fprintf(stderr, " %6.2f", 100.0 * p->c7/p->tsc);
if (do_snb_cstates)
- fprintf(stderr, "%7.2f", 100.0 * p->pc2/p->tsc);
+ fprintf(stderr, " %5.2f", 100.0 * p->pc2/p->tsc);
if (do_nhm_cstates)
- fprintf(stderr, "%7.2f", 100.0 * p->pc3/p->tsc);
+ fprintf(stderr, " %5.2f", 100.0 * p->pc3/p->tsc);
if (do_nhm_cstates)
- fprintf(stderr, "%7.2f", 100.0 * p->pc6/p->tsc);
+ fprintf(stderr, " %5.2f", 100.0 * p->pc6/p->tsc);
if (do_snb_cstates)
- fprintf(stderr, "%7.2f", 100.0 * p->pc7/p->tsc);
+ fprintf(stderr, " %5.2f", 100.0 * p->pc7/p->tsc);
if (extra_msr_offset)
fprintf(stderr, " 0x%016llx", p->extra_msr);
putc('\n', stderr);
diff --git a/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c b/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c
index 2618ef2..33c5c7e 100644
--- a/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c
+++ b/tools/power/x86/x86_energy_perf_policy/x86_energy_perf_policy.c
@@ -137,7 +137,6 @@
void validate_cpuid(void)
{
unsigned int eax, ebx, ecx, edx, max_level;
- char brand[16];
unsigned int fms, family, model, stepping;
eax = ebx = ecx = edx = 0;
@@ -160,8 +159,8 @@
model += ((fms >> 16) & 0xf) << 4;
if (verbose > 1)
- printf("CPUID %s %d levels family:model:stepping "
- "0x%x:%x:%x (%d:%d:%d)\n", brand, max_level,
+ printf("CPUID %d levels family:model:stepping "
+ "0x%x:%x:%x (%d:%d:%d)\n", max_level,
family, model, stepping, family, model, stepping);
if (!(edx & (1 << 5))) {