Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
[POWERPC] mpc5200: Fix incorrect compatible string for the mdio node
[POWERPC] Update some defconfigs
diff --git a/Documentation/hw_random.txt b/Documentation/hw_random.txt
index bb58c36..690f525 100644
--- a/Documentation/hw_random.txt
+++ b/Documentation/hw_random.txt
@@ -1,20 +1,54 @@
- Hardware driver for Intel/AMD/VIA Random Number Generators (RNG)
- Copyright 2000,2001 Jeff Garzik <jgarzik@pobox.com>
- Copyright 2000,2001 Philipp Rumpf <prumpf@mandrakesoft.com>
-
Introduction:
- The hw_random device driver is software that makes use of a
+ The hw_random framework is software that makes use of a
special hardware feature on your CPU or motherboard,
- a Random Number Generator (RNG).
+ a Random Number Generator (RNG). The software has two parts:
+ a core providing the /dev/hw_random character device and its
+ sysfs support, plus a hardware-specific driver that plugs
+ into that core.
- In order to make effective use of this device driver, you
+ To make the most effective use of these mechanisms, you
should download the support software as well. Download the
latest version of the "rng-tools" package from the
hw_random driver's official Web site:
http://sourceforge.net/projects/gkernel/
+ Those tools use /dev/hw_random to fill the kernel entropy pool,
+ which is used internally and exported by the /dev/urandom and
+ /dev/random special files.
+
+Theory of operation:
+
+ CHARACTER DEVICE. Using the standard open()
+ and read() system calls, you can read random data from
+ the hardware RNG device. This data is NOT CHECKED by any
+ fitness tests, and could potentially be bogus (if the
+ hardware is faulty or has been tampered with). Data is only
+ output if the hardware "has-data" flag is set, but nevertheless
+ a security-conscious person would run fitness tests on the
+ data before assuming it is truly random.
+
+ The rng-tools package uses such tests in "rngd", and lets you
+ run them by hand with a "rngtest" utility.
+
+ /dev/hw_random is char device major 10, minor 183.
+
+ CLASS DEVICE. There is a /sys/class/misc/hw_random node with
+ two unique attributes, "rng_available" and "rng_current". The
+ "rng_available" attribute lists the hardware-specific drivers
+ available, while "rng_current" lists the one which is currently
+ connected to /dev/hw_random. If your system has more than one
+ RNG available, you may change the one used by writing a name from
+ the list in "rng_available" into "rng_current".
+
+==========================================================================
+
+ Hardware driver for Intel/AMD/VIA Random Number Generators (RNG)
+ Copyright 2000,2001 Jeff Garzik <jgarzik@pobox.com>
+ Copyright 2000,2001 Philipp Rumpf <prumpf@mandrakesoft.com>
+
+
About the Intel RNG hardware, from the firmware hub datasheet:
The Firmware Hub integrates a Random Number Generator (RNG)
@@ -25,20 +59,7 @@
access to our RNG for use as a security feature. At this time,
the RNG is only to be used with a system in an OS-present state.
-Theory of operation:
-
- Character driver. Using the standard open()
- and read() system calls, you can read random data from
- the hardware RNG device. This data is NOT CHECKED by any
- fitness tests, and could potentially be bogus (if the
- hardware is faulty or has been tampered with). Data is only
- output if the hardware "has-data" flag is set, but nevertheless
- a security-conscious person would run fitness tests on the
- data before assuming it is truly random.
-
- /dev/hwrandom is char device major 10, minor 183.
-
-Driver notes:
+Intel RNG Driver notes:
* FIXME: support poll(2)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 650b0d8..508e2a2 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1130,6 +1130,10 @@
memmap=nn[KMG]$ss[KMG]
[KNL,ACPI] Mark specific memory as reserved.
Region of memory to be used, from ss to ss+nn.
+ Example: Exclude memory from 0x18690000-0x1869ffff
+ memmap=64K$0x18690000
+ or
+ memmap=0x10000$0x18690000
meye.*= [HW] Set MotionEye Camera parameters
See Documentation/video4linux/meye.txt.
diff --git a/Makefile b/Makefile
index 7a4d34b..1c4c8f8 100644
--- a/Makefile
+++ b/Makefile
@@ -189,7 +189,7 @@
# Alternatively CROSS_COMPILE can be set in the environment.
# Default value for CROSS_COMPILE is not to prefix executables
# Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
-
+export KBUILD_BUILDHOST := $(SUBARCH)
ARCH ?= $(SUBARCH)
CROSS_COMPILE ?=
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 17ee6ed..b1eb4e2 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -433,6 +433,7 @@
/* board_ahci_sb600 */
{
AHCI_HFLAGS (AHCI_HFLAG_IGN_SERR_INTERNAL |
+ AHCI_HFLAG_32BIT_ONLY |
AHCI_HFLAG_SECT255 | AHCI_HFLAG_NO_PMP),
.flags = AHCI_FLAG_COMMON,
.link_flags = AHCI_LFLAG_COMMON,
@@ -1217,8 +1218,11 @@
{
struct ahci_host_priv *hpriv = dev->link->ap->host->private_data;
- if (hpriv->flags & AHCI_HFLAG_SECT255)
+ if (hpriv->flags & AHCI_HFLAG_SECT255) {
dev->max_sectors = 255;
+ ata_dev_printk(dev, KERN_INFO,
+ "SB600 AHCI: limiting to 255 sectors per cmd\n");
+ }
}
static unsigned int ahci_dev_classify(struct ata_port *ap)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 4bbe31f..c4248b3 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -1416,12 +1416,12 @@
/* read native max address */
rc = ata_read_native_max_address(dev, &native_sectors);
if (rc) {
- /* If HPA isn't going to be unlocked, skip HPA
- * resizing from the next try.
+ /* If device aborted the command or HPA isn't going to
+ * be unlocked, skip HPA resizing.
*/
- if (!ata_ignore_hpa) {
+ if (rc == -EACCES || !ata_ignore_hpa) {
ata_dev_printk(dev, KERN_WARNING, "HPA support seems "
- "broken, will skip HPA handling\n");
+ "broken, skipping HPA handling\n");
dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
/* we can continue if device aborted the command */
@@ -2092,24 +2092,34 @@
id, sizeof(id[0]) * ATA_ID_WORDS, 0);
if (err_mask) {
if (err_mask & AC_ERR_NODEV_HINT) {
- DPRINTK("ata%u.%d: NODEV after polling detection\n",
- ap->print_id, dev->devno);
+ ata_dev_printk(dev, KERN_DEBUG,
+ "NODEV after polling detection\n");
return -ENOENT;
}
- /* Device or controller might have reported the wrong
- * device class. Give a shot at the other IDENTIFY if
- * the current one is aborted by the device.
- */
- if (may_fallback &&
- (err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
- may_fallback = 0;
+ if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
+ /* Device or controller might have reported
+ * the wrong device class. Give a shot at the
+ * other IDENTIFY if the current one is
+ * aborted by the device.
+ */
+ if (may_fallback) {
+ may_fallback = 0;
- if (class == ATA_DEV_ATA)
- class = ATA_DEV_ATAPI;
- else
- class = ATA_DEV_ATA;
- goto retry;
+ if (class == ATA_DEV_ATA)
+ class = ATA_DEV_ATAPI;
+ else
+ class = ATA_DEV_ATA;
+ goto retry;
+ }
+
+ /* Control reaches here iff the device aborted
+ * both flavors of IDENTIFYs which happens
+ * sometimes with phantom devices.
+ */
+ ata_dev_printk(dev, KERN_DEBUG,
+ "both IDENTIFYs aborted, assuming NODEV\n");
+ return -ENOENT;
}
rc = -EIO;
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 8f0e8f2..15795394 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -527,6 +527,14 @@
return qc;
}
+static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
+{
+ struct scsi_cmnd *scmd = qc->scsicmd;
+
+ qc->extrabytes = scmd->request->extra_len;
+ qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
+}
+
/**
* ata_dump_status - user friendly display of error info
* @id: id of the port in question
@@ -2539,7 +2547,7 @@
}
qc->tf.command = ATA_CMD_PACKET;
- qc->nbytes = scsi_bufflen(scmd) + scmd->request->extra_len;
+ ata_qc_set_pc_nbytes(qc);
/* check whether ATAPI DMA is safe */
if (!using_pio && ata_check_atapi_dma(qc))
@@ -2550,7 +2558,7 @@
* want to set it properly, and for DMA where it is
* effectively meaningless.
*/
- nbytes = min(scmd->request->data_len, (unsigned int)63 * 1024);
+ nbytes = min(ata_qc_raw_nbytes(qc), (unsigned int)63 * 1024);
/* Most ATAPI devices which honor transfer chunk size don't
* behave according to the spec when odd chunk size which
@@ -2876,7 +2884,7 @@
* TODO: find out if we need to do more here to
* cover scatter/gather case.
*/
- qc->nbytes = scsi_bufflen(scmd) + scmd->request->extra_len;
+ ata_qc_set_pc_nbytes(qc);
/* request result TF and be quiet about device error */
qc->flags |= ATA_QCFLAG_RESULT_TF | ATA_QCFLAG_QUIET;
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index 109ddd4..257951d 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -564,7 +564,7 @@
struct it821x_dev *itdev = ap->private_data;
/* Only use dma for transfers to/from the media. */
- if (qc->nbytes < 2048)
+ if (ata_qc_raw_nbytes(qc) < 2048)
return -EOPNOTSUPP;
/* No ATAPI DMA in smart mode */
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index f251a5f..11c1afe 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -46,7 +46,7 @@
#include "sata_promise.h"
#define DRV_NAME "sata_promise"
-#define DRV_VERSION "2.11"
+#define DRV_VERSION "2.12"
enum {
PDC_MAX_PORTS = 4,
@@ -145,7 +145,9 @@
static void pdc_irq_clear(struct ata_port *ap);
static unsigned int pdc_qc_issue_prot(struct ata_queued_cmd *qc);
static void pdc_freeze(struct ata_port *ap);
+static void pdc_sata_freeze(struct ata_port *ap);
static void pdc_thaw(struct ata_port *ap);
+static void pdc_sata_thaw(struct ata_port *ap);
static void pdc_pata_error_handler(struct ata_port *ap);
static void pdc_sata_error_handler(struct ata_port *ap);
static void pdc_post_internal_cmd(struct ata_queued_cmd *qc);
@@ -180,8 +182,8 @@
.qc_prep = pdc_qc_prep,
.qc_issue = pdc_qc_issue_prot,
- .freeze = pdc_freeze,
- .thaw = pdc_thaw,
+ .freeze = pdc_sata_freeze,
+ .thaw = pdc_sata_thaw,
.error_handler = pdc_sata_error_handler,
.post_internal_cmd = pdc_post_internal_cmd,
.cable_detect = pdc_sata_cable_detect,
@@ -205,8 +207,8 @@
.qc_prep = pdc_qc_prep,
.qc_issue = pdc_qc_issue_prot,
- .freeze = pdc_freeze,
- .thaw = pdc_thaw,
+ .freeze = pdc_sata_freeze,
+ .thaw = pdc_sata_thaw,
.error_handler = pdc_sata_error_handler,
.post_internal_cmd = pdc_post_internal_cmd,
.cable_detect = pdc_sata_cable_detect,
@@ -631,6 +633,41 @@
}
}
+static int pdc_is_sataii_tx4(unsigned long flags)
+{
+ const unsigned long mask = PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS;
+ return (flags & mask) == mask;
+}
+
+static unsigned int pdc_port_no_to_ata_no(unsigned int port_no,
+ int is_sataii_tx4)
+{
+ static const unsigned char sataii_tx4_port_remap[4] = { 3, 1, 0, 2};
+ return is_sataii_tx4 ? sataii_tx4_port_remap[port_no] : port_no;
+}
+
+static unsigned int pdc_sata_nr_ports(const struct ata_port *ap)
+{
+ return (ap->flags & PDC_FLAG_4_PORTS) ? 4 : 2;
+}
+
+static unsigned int pdc_sata_ata_port_to_ata_no(const struct ata_port *ap)
+{
+ const struct ata_host *host = ap->host;
+ unsigned int nr_ports = pdc_sata_nr_ports(ap);
+ unsigned int i;
+
+ for(i = 0; i < nr_ports && host->ports[i] != ap; ++i)
+ ;
+ BUG_ON(i >= nr_ports);
+ return pdc_port_no_to_ata_no(i, pdc_is_sataii_tx4(ap->flags));
+}
+
+static unsigned int pdc_sata_hotplug_offset(const struct ata_port *ap)
+{
+ return (ap->flags & PDC_FLAG_GEN_II) ? PDC2_SATA_PLUG_CSR : PDC_SATA_PLUG_CSR;
+}
+
static void pdc_freeze(struct ata_port *ap)
{
void __iomem *mmio = ap->ioaddr.cmd_addr;
@@ -643,6 +680,29 @@
readl(mmio + PDC_CTLSTAT); /* flush */
}
+static void pdc_sata_freeze(struct ata_port *ap)
+{
+ struct ata_host *host = ap->host;
+ void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
+ unsigned int hotplug_offset = pdc_sata_hotplug_offset(ap);
+ unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap);
+ u32 hotplug_status;
+
+ /* Disable hotplug events on this port.
+ *
+ * Locking:
+ * 1) hotplug register accesses must be serialised via host->lock
+ * 2) ap->lock == &ap->host->lock
+ * 3) ->freeze() and ->thaw() are called with ap->lock held
+ */
+ hotplug_status = readl(host_mmio + hotplug_offset);
+ hotplug_status |= 0x11 << (ata_no + 16);
+ writel(hotplug_status, host_mmio + hotplug_offset);
+ readl(host_mmio + hotplug_offset); /* flush */
+
+ pdc_freeze(ap);
+}
+
static void pdc_thaw(struct ata_port *ap)
{
void __iomem *mmio = ap->ioaddr.cmd_addr;
@@ -658,6 +718,26 @@
readl(mmio + PDC_CTLSTAT); /* flush */
}
+static void pdc_sata_thaw(struct ata_port *ap)
+{
+ struct ata_host *host = ap->host;
+ void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
+ unsigned int hotplug_offset = pdc_sata_hotplug_offset(ap);
+ unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap);
+ u32 hotplug_status;
+
+ pdc_thaw(ap);
+
+ /* Enable hotplug events on this port.
+ * Locking: see pdc_sata_freeze().
+ */
+ hotplug_status = readl(host_mmio + hotplug_offset);
+ hotplug_status |= 0x11 << ata_no;
+ hotplug_status &= ~(0x11 << (ata_no + 16));
+ writel(hotplug_status, host_mmio + hotplug_offset);
+ readl(host_mmio + hotplug_offset); /* flush */
+}
+
static void pdc_common_error_handler(struct ata_port *ap, ata_reset_fn_t hardreset)
{
if (!(ap->pflags & ATA_PFLAG_FROZEN))
@@ -765,19 +845,6 @@
readl(mmio + PDC_INT_SEQMASK);
}
-static int pdc_is_sataii_tx4(unsigned long flags)
-{
- const unsigned long mask = PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS;
- return (flags & mask) == mask;
-}
-
-static unsigned int pdc_port_no_to_ata_no(unsigned int port_no,
- int is_sataii_tx4)
-{
- static const unsigned char sataii_tx4_port_remap[4] = { 3, 1, 0, 2};
- return is_sataii_tx4 ? sataii_tx4_port_remap[port_no] : port_no;
-}
-
static irqreturn_t pdc_interrupt(int irq, void *dev_instance)
{
struct ata_host *host = dev_instance;
@@ -799,6 +866,8 @@
mmio_base = host->iomap[PDC_MMIO_BAR];
+ spin_lock(&host->lock);
+
/* read and clear hotplug flags for all ports */
if (host->ports[0]->flags & PDC_FLAG_GEN_II)
hotplug_offset = PDC2_SATA_PLUG_CSR;
@@ -814,11 +883,9 @@
if (mask == 0xffffffff && hotplug_status == 0) {
VPRINTK("QUICK EXIT 2\n");
- return IRQ_NONE;
+ goto done_irq;
}
- spin_lock(&host->lock);
-
mask &= 0xffff; /* only 16 tags possible */
if (mask == 0 && hotplug_status == 0) {
VPRINTK("QUICK EXIT 3\n");
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index 6bbd4fa..8d6c208 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -9,7 +9,14 @@
Hardware Random Number Generator Core infrastructure.
To compile this driver as a module, choose M here: the
- module will be called rng-core.
+ module will be called rng-core. This provides a device
+ that's usually called /dev/hw_random, and which exposes one
+ of possibly several hardware random number generators.
+
+ These hardware random number generators do not feed directly
+ into the kernel's random number generator. That is usually
+ handled by the "rngd" daemon. Documentation/hw_random.txt
+ has more information.
If unsure, say Y.
diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index eeaaa9d..ad1880c 100644
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -408,7 +408,6 @@
if (token[1]) {
ret = parse_num(&erase_size, token[1]);
if (ret) {
- kfree(name);
parse_err("illegal erase size");
}
}
diff --git a/include/linux/libata.h b/include/linux/libata.h
index a05f600..269cdba 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -463,6 +463,7 @@
unsigned int sect_size;
unsigned int nbytes;
+ unsigned int extrabytes;
unsigned int curbytes;
struct scatterlist *cursg;
@@ -1336,6 +1337,11 @@
return NULL;
}
+static inline unsigned int ata_qc_raw_nbytes(struct ata_queued_cmd *qc)
+{
+ return qc->nbytes - min(qc->extrabytes, qc->nbytes);
+}
+
static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf)
{
memset(tf, 0, sizeof(*tf));
@@ -1354,7 +1360,7 @@
qc->flags = 0;
qc->cursg = NULL;
qc->cursg_ofs = 0;
- qc->nbytes = qc->curbytes = 0;
+ qc->nbytes = qc->extrabytes = qc->curbytes = 0;
qc->n_elem = 0;
qc->err_mask = 0;
qc->sect_size = ATA_SECT_SIZE;
diff --git a/kernel/acct.c b/kernel/acct.c
index 521dfa5..91e1cfd 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -58,6 +58,7 @@
#include <asm/uaccess.h>
#include <asm/div64.h>
#include <linux/blkdev.h> /* sector_div */
+#include <linux/pid_namespace.h>
/*
* These constants control the amount of freespace that suspend and
@@ -74,7 +75,7 @@
/*
* External references and all of the globals.
*/
-static void do_acct_process(struct file *);
+static void do_acct_process(struct pid_namespace *ns, struct file *);
/*
* This structure is used so that all the data protected by lock
@@ -86,6 +87,7 @@
volatile int active;
volatile int needcheck;
struct file *file;
+ struct pid_namespace *ns;
struct timer_list timer;
};
@@ -175,9 +177,11 @@
static void acct_file_reopen(struct file *file)
{
struct file *old_acct = NULL;
+ struct pid_namespace *old_ns = NULL;
if (acct_globals.file) {
old_acct = acct_globals.file;
+ old_ns = acct_globals.ns;
del_timer(&acct_globals.timer);
acct_globals.active = 0;
acct_globals.needcheck = 0;
@@ -185,6 +189,7 @@
}
if (file) {
acct_globals.file = file;
+ acct_globals.ns = get_pid_ns(task_active_pid_ns(current));
acct_globals.needcheck = 0;
acct_globals.active = 1;
/* It's been deleted if it was used before so this is safe */
@@ -196,8 +201,9 @@
if (old_acct) {
mnt_unpin(old_acct->f_path.mnt);
spin_unlock(&acct_globals.lock);
- do_acct_process(old_acct);
+ do_acct_process(old_ns, old_acct);
filp_close(old_acct, NULL);
+ put_pid_ns(old_ns);
spin_lock(&acct_globals.lock);
}
}
@@ -419,7 +425,7 @@
/*
* do_acct_process does all actual work. Caller holds the reference to file.
*/
-static void do_acct_process(struct file *file)
+static void do_acct_process(struct pid_namespace *ns, struct file *file)
{
struct pacct_struct *pacct = ¤t->signal->pacct;
acct_t ac;
@@ -481,8 +487,10 @@
ac.ac_gid16 = current->gid;
#endif
#if ACCT_VERSION==3
- ac.ac_pid = current->tgid;
- ac.ac_ppid = current->real_parent->tgid;
+ ac.ac_pid = task_tgid_nr_ns(current, ns);
+ rcu_read_lock();
+ ac.ac_ppid = task_tgid_nr_ns(rcu_dereference(current->real_parent), ns);
+ rcu_read_unlock();
#endif
spin_lock_irq(¤t->sighand->siglock);
@@ -578,6 +586,7 @@
void acct_process(void)
{
struct file *file = NULL;
+ struct pid_namespace *ns;
/*
* accelerate the common fastpath:
@@ -592,8 +601,10 @@
return;
}
get_file(file);
+ ns = get_pid_ns(acct_globals.ns);
spin_unlock(&acct_globals.lock);
- do_acct_process(file);
+ do_acct_process(ns, file);
fput(file);
+ put_pid_ns(ns);
}
diff --git a/kernel/marker.c b/kernel/marker.c
index 48a4ea5a..041c33e 100644
--- a/kernel/marker.c
+++ b/kernel/marker.c
@@ -104,18 +104,18 @@
char ptype;
/*
- * disabling preemption to make sure the teardown of the callbacks can
- * be done correctly when they are in modules and they insure RCU read
- * coherency.
+ * preempt_disable does two things : disabling preemption to make sure
+ * the teardown of the callbacks can be done correctly when they are in
+ * modules and they insure RCU read coherency.
*/
preempt_disable();
- ptype = ACCESS_ONCE(mdata->ptype);
+ ptype = mdata->ptype;
if (likely(!ptype)) {
marker_probe_func *func;
/* Must read the ptype before ptr. They are not data dependant,
* so we put an explicit smp_rmb() here. */
smp_rmb();
- func = ACCESS_ONCE(mdata->single.func);
+ func = mdata->single.func;
/* Must read the ptr before private data. They are not data
* dependant, so we put an explicit smp_rmb() here. */
smp_rmb();
@@ -133,7 +133,7 @@
* in the fast path, so put the explicit barrier here.
*/
smp_read_barrier_depends();
- multi = ACCESS_ONCE(mdata->multi);
+ multi = mdata->multi;
for (i = 0; multi[i].func; i++) {
va_start(args, fmt);
multi[i].func(multi[i].probe_private, call_private, fmt,
@@ -161,13 +161,13 @@
char ptype;
preempt_disable();
- ptype = ACCESS_ONCE(mdata->ptype);
+ ptype = mdata->ptype;
if (likely(!ptype)) {
marker_probe_func *func;
/* Must read the ptype before ptr. They are not data dependant,
* so we put an explicit smp_rmb() here. */
smp_rmb();
- func = ACCESS_ONCE(mdata->single.func);
+ func = mdata->single.func;
/* Must read the ptr before private data. They are not data
* dependant, so we put an explicit smp_rmb() here. */
smp_rmb();
@@ -183,7 +183,7 @@
* in the fast path, so put the explicit barrier here.
*/
smp_read_barrier_depends();
- multi = ACCESS_ONCE(mdata->multi);
+ multi = mdata->multi;
for (i = 0; multi[i].func; i++)
multi[i].func(multi[i].probe_private, call_private, fmt,
&args);
@@ -551,9 +551,9 @@
/*
* Disable a marker and its probe callback.
- * Note: only after a synchronize_sched() issued after setting elem->call to the
- * empty function insures that the original callback is not used anymore. This
- * insured by preemption disabling around the call site.
+ * Note: only waiting an RCU period after setting elem->call to the empty
+ * function insures that the original callback is not used anymore. This insured
+ * by preempt_disable around the call site.
*/
static void disable_marker(struct marker *elem)
{
@@ -565,8 +565,8 @@
elem->ptype = 0; /* single probe */
/*
* Leave the private data and id there, because removal is racy and
- * should be done only after a synchronize_sched(). These are never used
- * until the next initialization anyway.
+ * should be done only after an RCU period. These are never used until
+ * the next initialization anyway.
*/
}
@@ -601,9 +601,6 @@
/*
* Update probes, removing the faulty probes.
- * Issues a synchronize_sched() when no reference to the module passed
- * as parameter is found in the probes so the probe module can be
- * safely unloaded from now on.
*
* Internal callback only changed before the first probe is connected to it.
* Single probe private data can only be changed on 0 -> 1 and 2 -> 1
diff --git a/kernel/printk.c b/kernel/printk.c
index 9adc2a4..c46a20a 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -616,6 +616,40 @@
/* cpu currently holding logbuf_lock */
static volatile unsigned int printk_cpu = UINT_MAX;
+/*
+ * Can we actually use the console at this time on this cpu?
+ *
+ * Console drivers may assume that per-cpu resources have
+ * been allocated. So unless they're explicitly marked as
+ * being able to cope (CON_ANYTIME) don't call them until
+ * this CPU is officially up.
+ */
+static inline int can_use_console(unsigned int cpu)
+{
+ return cpu_online(cpu) || have_callable_console();
+}
+
+/*
+ * Try to get console ownership to actually show the kernel
+ * messages from a 'printk'. Return true (and with the
+ * console_semaphore held, and 'console_locked' set) if it
+ * is successful, false otherwise.
+ *
+ * This gets called with the 'logbuf_lock' spinlock held and
+ * interrupts disabled. It should return with 'lockbuf_lock'
+ * released but interrupts still disabled.
+ */
+static int acquire_console_semaphore_for_printk(unsigned int cpu)
+{
+ int retval = 0;
+
+ if (can_use_console(cpu))
+ retval = !try_acquire_console_sem();
+ printk_cpu = UINT_MAX;
+ spin_unlock(&logbuf_lock);
+ return retval;
+}
+
const char printk_recursion_bug_msg [] =
KERN_CRIT "BUG: recent printk recursion!\n";
static int printk_recursion_bug;
@@ -725,43 +759,22 @@
log_level_unknown = 1;
}
- if (!down_trylock(&console_sem)) {
- /*
- * We own the drivers. We can drop the spinlock and
- * let release_console_sem() print the text, maybe ...
- */
- console_locked = 1;
- printk_cpu = UINT_MAX;
- spin_unlock(&logbuf_lock);
+ /*
+ * Try to acquire and then immediately release the
+ * console semaphore. The release will do all the
+ * actual magic (print out buffers, wake up klogd,
+ * etc).
+ *
+ * The acquire_console_semaphore_for_printk() function
+ * will release 'logbuf_lock' regardless of whether it
+ * actually gets the semaphore or not.
+ */
+ if (acquire_console_semaphore_for_printk(this_cpu))
+ release_console_sem();
- /*
- * Console drivers may assume that per-cpu resources have
- * been allocated. So unless they're explicitly marked as
- * being able to cope (CON_ANYTIME) don't call them until
- * this CPU is officially up.
- */
- if (cpu_online(smp_processor_id()) || have_callable_console()) {
- console_may_schedule = 0;
- release_console_sem();
- } else {
- /* Release by hand to avoid flushing the buffer. */
- console_locked = 0;
- up(&console_sem);
- }
- lockdep_on();
- raw_local_irq_restore(flags);
- } else {
- /*
- * Someone else owns the drivers. We drop the spinlock, which
- * allows the semaphore holder to proceed and to call the
- * console drivers with the output which we just produced.
- */
- printk_cpu = UINT_MAX;
- spin_unlock(&logbuf_lock);
- lockdep_on();
+ lockdep_on();
out_restore_irqs:
- raw_local_irq_restore(flags);
- }
+ raw_local_irq_restore(flags);
preempt_enable();
return printed_len;
diff --git a/mm/bootmem.c b/mm/bootmem.c
index f6ff433..2ccea70 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -125,6 +125,7 @@
BUG_ON(!size);
BUG_ON(PFN_DOWN(addr) >= bdata->node_low_pfn);
BUG_ON(PFN_UP(addr + size) > bdata->node_low_pfn);
+ BUG_ON(addr < bdata->node_boot_start);
sidx = PFN_DOWN(addr - bdata->node_boot_start);
eidx = PFN_UP(addr + size - bdata->node_boot_start);
@@ -156,21 +157,31 @@
unsigned long sidx, eidx;
unsigned long i;
+ BUG_ON(!size);
+
+ /* out range */
+ if (addr + size < bdata->node_boot_start ||
+ PFN_DOWN(addr) > bdata->node_low_pfn)
+ return;
/*
* round down end of usable mem, partially free pages are
* considered reserved.
*/
- BUG_ON(!size);
- BUG_ON(PFN_DOWN(addr + size) > bdata->node_low_pfn);
- if (addr < bdata->last_success)
+ if (addr >= bdata->node_boot_start && addr < bdata->last_success)
bdata->last_success = addr;
/*
- * Round up the beginning of the address.
+ * Round up to index to the range.
*/
- sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start);
+ if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start))
+ sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start);
+ else
+ sidx = 0;
+
eidx = PFN_DOWN(addr + size - bdata->node_boot_start);
+ if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start))
+ eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);
for (i = sidx; i < eidx; i++) {
if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map)))
@@ -421,7 +432,9 @@
void __init free_bootmem(unsigned long addr, unsigned long size)
{
- free_bootmem_core(NODE_DATA(0)->bdata, addr, size);
+ bootmem_data_t *bdata;
+ list_for_each_entry(bdata, &bdata_list, list)
+ free_bootmem_core(bdata, addr, size);
}
unsigned long __init free_all_bootmem(void)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 4571158..4046434 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -70,13 +70,6 @@
int order;
- /*
- * Pages that have (or should have) IO pending. If we run into
- * a lot of these, we're better off waiting a little for IO to
- * finish rather than scanning more pages in the VM.
- */
- int nr_io_pages;
-
/* Which cgroup do we reclaim from */
struct mem_cgroup *mem_cgroup;
@@ -512,10 +505,8 @@
*/
if (sync_writeback == PAGEOUT_IO_SYNC && may_enter_fs)
wait_on_page_writeback(page);
- else {
- sc->nr_io_pages++;
+ else
goto keep_locked;
- }
}
referenced = page_referenced(page, 1, sc->mem_cgroup);
@@ -554,10 +545,8 @@
if (PageDirty(page)) {
if (sc->order <= PAGE_ALLOC_COSTLY_ORDER && referenced)
goto keep_locked;
- if (!may_enter_fs) {
- sc->nr_io_pages++;
+ if (!may_enter_fs)
goto keep_locked;
- }
if (!sc->may_writepage)
goto keep_locked;
@@ -568,10 +557,8 @@
case PAGE_ACTIVATE:
goto activate_locked;
case PAGE_SUCCESS:
- if (PageWriteback(page) || PageDirty(page)) {
- sc->nr_io_pages++;
+ if (PageWriteback(page) || PageDirty(page))
goto keep;
- }
/*
* A synchronous write - probably a ramdisk. Go
* ahead and try to reclaim the page.
@@ -1344,7 +1331,6 @@
for (priority = DEF_PRIORITY; priority >= 0; priority--) {
sc->nr_scanned = 0;
- sc->nr_io_pages = 0;
if (!priority)
disable_swap_token();
nr_reclaimed += shrink_zones(priority, zones, sc);
@@ -1379,8 +1365,7 @@
}
/* Take a nap, wait for some writeback to complete */
- if (sc->nr_scanned && priority < DEF_PRIORITY - 2 &&
- sc->nr_io_pages > sc->swap_cluster_max)
+ if (sc->nr_scanned && priority < DEF_PRIORITY - 2)
congestion_wait(WRITE, HZ/10);
}
/* top priority shrink_caches still had more to do? don't OOM, then */
@@ -1514,7 +1499,6 @@
if (!priority)
disable_swap_token();
- sc.nr_io_pages = 0;
all_zones_ok = 1;
/*
@@ -1607,8 +1591,7 @@
* OK, kswapd is getting into trouble. Take a nap, then take
* another pass across the zones.
*/
- if (total_scanned && priority < DEF_PRIORITY - 2 &&
- sc.nr_io_pages > sc.swap_cluster_max)
+ if (total_scanned && priority < DEF_PRIORITY - 2)
congestion_wait(WRITE, HZ/10);
/*
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index cfc004e..2d20640 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -58,6 +58,9 @@
# Stop after building .o files if NOFINAL is set. Makes compile tests quicker
_modpost: $(if $(KBUILD_MODPOST_NOFINAL), $(modules:.ko:.o),$(modules))
+ifneq ($(KBUILD_BUILDHOST),$(ARCH))
+ cross_build := 1
+endif
# Step 2), invoke modpost
# Includes step 3,4
@@ -70,7 +73,8 @@
$(if $(CONFIG_DEBUG_SECTION_MISMATCH),,-S) \
$(if $(CONFIG_MARKERS),-K $(kernelmarkersfile)) \
$(if $(CONFIG_MARKERS),-M $(markersfile)) \
- $(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w)
+ $(if $(KBUILD_EXTMOD)$(KBUILD_MODPOST_WARN),-w) \
+ $(if $(cross_build),-c)
quiet_cmd_modpost = MODPOST $(words $(filter-out vmlinux FORCE, $^)) modules
cmd_modpost = $(modpost) -s
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 9ddf944..348d868 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -51,11 +51,13 @@
sprintf(str + strlen(str), "*"); \
} while(0)
+unsigned int cross_build = 0;
/**
* Check that sizeof(device_id type) are consistent with size of section
* in .o file. If in-consistent then userspace and kernel does not agree
* on actual size which is a bug.
* Also verify that the final entry in the table is all zeros.
+ * Ignore both checks if build host differ from target host and size differs.
**/
static void device_id_check(const char *modname, const char *device_id,
unsigned long size, unsigned long id_size,
@@ -64,6 +66,8 @@
int i;
if (size % id_size || size < id_size) {
+ if (cross_build != 0)
+ return;
fatal("%s: sizeof(struct %s_device_id)=%lu is not a modulo "
"of the size of section __mod_%s_device_table=%lu.\n"
"Fix definition of struct %s_device_id "
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 695b5d6..110cf24 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -2026,7 +2026,7 @@
int opt;
int err;
- while ((opt = getopt(argc, argv, "i:I:msSo:awM:K:")) != -1) {
+ while ((opt = getopt(argc, argv, "i:I:cmsSo:awM:K:")) != -1) {
switch (opt) {
case 'i':
kernel_read = optarg;
@@ -2035,6 +2035,9 @@
module_read = optarg;
external_module = 1;
break;
+ case 'c':
+ cross_build = 1;
+ break;
case 'm':
modversions = 1;
break;
diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index 565c587..09f58e3 100644
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -135,6 +135,7 @@
};
/* file2alias.c */
+extern unsigned int cross_build;
void handle_moddevtable(struct module *mod, struct elf_info *info,
Elf_Sym *sym, const char *symname);
void add_moddevtable(struct buffer *buf, struct module *mod);
diff --git a/security/smack/smackfs.c b/security/smack/smackfs.c
index afe7c9b..cfae8af 100644
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
@@ -74,11 +74,6 @@
#define SEQ_READ_FINISHED 1
/*
- * Disable concurrent writing open() operations
- */
-static struct semaphore smack_write_sem;
-
-/*
* Values for parsing cipso rules
* SMK_DIGITLEN: Length of a digit field in a rule.
* SMK_CIPSOMIN: Minimum possible cipso rule length.
@@ -168,32 +163,7 @@
*/
static int smk_open_load(struct inode *inode, struct file *file)
{
- if ((file->f_flags & O_ACCMODE) == O_RDONLY)
- return seq_open(file, &load_seq_ops);
-
- if (down_interruptible(&smack_write_sem))
- return -ERESTARTSYS;
-
- return 0;
-}
-
-/**
- * smk_release_load - release() for /smack/load
- * @inode: inode structure representing file
- * @file: "load" file pointer
- *
- * For a reading session, use the seq_file release
- * implementation.
- * Otherwise, we are at the end of a writing session so
- * clean everything up.
- */
-static int smk_release_load(struct inode *inode, struct file *file)
-{
- if ((file->f_flags & O_ACCMODE) == O_RDONLY)
- return seq_release(inode, file);
-
- up(&smack_write_sem);
- return 0;
+ return seq_open(file, &load_seq_ops);
}
/**
@@ -341,7 +311,7 @@
.read = seq_read,
.llseek = seq_lseek,
.write = smk_write_load,
- .release = smk_release_load,
+ .release = seq_release,
};
/**
@@ -1011,7 +981,6 @@
}
}
- sema_init(&smack_write_sem, 1);
smk_cipso_doi();
smk_unlbl_ambient(NULL);