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Linus Torvalds bddffa28dc ACPI and power management fixes and new device IDs for 3.13-rc6
- Fix for a cpufreq regression causing stale sysfs files to be left
   behind during system resume if cpufreq_add_dev() fails for one or
   more CPUs from Viresh Kumar.
 
 - Fix for a bug in cpufreq causing CONFIG_CPU_FREQ_DEFAULT_* to be
   ignored when the intel_pstate driver is used from Jason Baron.
 
 - System suspend fix for a memory leak in pm_vt_switch_unregister()
   that forgot to release objects after removing them from
   pm_vt_switch_list.  From Masami Ichikawa.
 
 - Intel Valley View device ID and energy unit encoding update for the
   (recently added) Intel RAPL (Running Average Power Limit) driver
   from Jacob Pan.
 
 - Intel Bay Trail SoC GPIO and ACPI device IDs for the Low Power
   Subsystem (LPSS) ACPI driver from Paul Drews.
 
 /
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Merge tag 'pm+acpi-3.13-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management fixes and new device IDs from Rafael Wysocki:

 - Fix for a cpufreq regression causing stale sysfs files to be left
   behind during system resume if cpufreq_add_dev() fails for one or
   more CPUs from Viresh Kumar.

 - Fix for a bug in cpufreq causing CONFIG_CPU_FREQ_DEFAULT_* to be
   ignored when the intel_pstate driver is used from Jason Baron.

 - System suspend fix for a memory leak in pm_vt_switch_unregister()
   that forgot to release objects after removing them from
   pm_vt_switch_list.  From Masami Ichikawa.

 - Intel Valley View device ID and energy unit encoding update for the
   (recently added) Intel RAPL (Running Average Power Limit) driver from
   Jacob Pan.

 - Intel Bay Trail SoC GPIO and ACPI device IDs for the Low Power
   Subsystem (LPSS) ACPI driver from Paul Drews.

* tag 'pm+acpi-3.13-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  powercap / RAPL: add support for ValleyView Soc
  PM / sleep: Fix memory leak in pm_vt_switch_unregister().
  cpufreq: Use CONFIG_CPU_FREQ_DEFAULT_* to set initial policy for setpolicy drivers
  cpufreq: remove sysfs files for CPUs which failed to come back after resume
  ACPI: Add BayTrail SoC GPIO and LPSS ACPI IDs
2013-12-29 13:27:51 -08:00
Rafael J. Wysocki bfde19c4c2 Merge branches 'powercap' and 'acpi-lpss' with new device IDs
* powercap:
  powercap / RAPL: add support for ValleyView Soc

* acpi-lpss:
  ACPI: Add BayTrail SoC GPIO and LPSS ACPI IDs
2013-12-27 00:43:24 +01:00
Rafael J. Wysocki 1a6725359e Merge branches 'pm-cpufreq' and 'pm-sleep' containing PM fixes
* pm-cpufreq:
  cpufreq: Use CONFIG_CPU_FREQ_DEFAULT_* to set initial policy for setpolicy drivers
  cpufreq: remove sysfs files for CPUs which failed to come back after resume

* pm-sleep:
  PM / sleep: Fix memory leak in pm_vt_switch_unregister().
2013-12-27 00:42:27 +01:00
Linus Torvalds f41bfc9423 A collection of bug fixes destined for stable and some printk cleanups
and a patch so that instead of BUG'ing we use the ext4_error()
 framework to mark the file system is corrupted.
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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "A collection of bug fixes destined for stable and some printk cleanups
  and a patch so that instead of BUG'ing we use the ext4_error()
  framework to mark the file system is corrupted"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: add explicit casts when masking cluster sizes
  ext4: fix deadlock when writing in ENOSPC conditions
  jbd2: rename obsoleted msg JBD->JBD2
  jbd2: revise KERN_EMERG error messages
  jbd2: don't BUG but return ENOSPC if a handle runs out of space
  ext4: Do not reserve clusters when fs doesn't support extents
  ext4: fix del_timer() misuse for ->s_err_report
  ext4: check for overlapping extents in ext4_valid_extent_entries()
  ext4: fix use-after-free in ext4_mb_new_blocks
  ext4: call ext4_error_inode() if jbd2_journal_dirty_metadata() fails
2013-12-26 09:26:12 -08:00
Linus Torvalds c5fdd531b5 Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
 - fix for a memory leak on certain unplug events
 - a collection of bcache fixes from Kent and Nicolas
 - a few null_blk fixes and updates form Matias
 - a marking of static of functions in the stec pci-e driver

* 'for-linus' of git://git.kernel.dk/linux-block:
  null_blk: support submit_queues on use_per_node_hctx
  null_blk: set use_per_node_hctx param to false
  null_blk: corrections to documentation
  null_blk: warning on ignored submit_queues param
  null_blk: refactor init and init errors code paths
  null_blk: documentation
  null_blk: mem garbage on NUMA systems during init
  drivers: block: Mark the functions as static in skd_main.c
  bcache: New writeback PD controller
  bcache: bugfix for race between moving_gc and bucket_invalidate
  bcache: fix for gc and writeback race
  bcache: bugfix - moving_gc now moves only correct buckets
  bcache: fix for gc crashing when no sectors are used
  bcache: Fix heap_peek() macro
  bcache: Fix for can_attach_cache()
  bcache: Fix dirty_data accounting
  bcache: Use uninterruptible sleep in writeback
  bcache: kthread don't set writeback task to INTERUPTIBLE
  block: fix memory leaks on unplugging block device
  bcache: fix sparse non static symbol warning
2013-12-24 10:06:03 -08:00
Linus Torvalds 70e672fa73 Merge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull cgroup fixes from Tejun Heo:
 "Two fixes.  One fixes a bug in the error path of cgroup_create().  The
  other changes cgrp->id lifetime rule so that the id doesn't get
  recycled before all controller states are destroyed.  This premature
  id recycling made memcg malfunction"

* 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: don't recycle cgroup id until all csses' have been destroyed
  cgroup: fix cgroup_create() error handling path
2013-12-24 09:49:20 -08:00
Linus Torvalds f6398600f9 Merge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
Pull percpu fix from Tejun Heo:
 "A single commit to fix a spurious sparse warning coming from
  DEFINE_PER_CPU()'s hack to support the use of weak symbols.  Shouldn't
  cause observable behavior change"

* 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
  percpu: fix spurious sparse warnings from DEFINE_PER_CPU()
2013-12-24 09:48:43 -08:00
Linus Torvalds 4b69316ede Merge branch 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
 "There's one interseting commit - "libata, freezer: avoid block device
  removal while system is frozen".  It's an ugly hack working around a
  deadlock condition between driver core resume and block layer device
  removal paths through freezer which was made more reproducible by
  writeback being converted to workqueue some releases ago.  The bug has
  nothing to do with libata but it's just an workaround which is easy to
  backport.  After discussion, Rafael and I seem to agree that we don't
  really need kernel freezables - both kthread and workqueue.  There are
  few specific workqueues which constitute PM operations and require
  freezing, which will be converted to use workqueue_set_max_active()
  instead.  All other kernel freezer uses are planned to be removed,
  followed by the removal of kthread and workqueue freezer support,
  hopefully.

  Others are device-specific fixes.  The most notable is the addition of
  NO_NCQ_TRIM which is used to disable queued TRIM commands to Micro
  M500 SSDs which otherwise suffers data corruption"

* 'for-3.13-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  libata, freezer: avoid block device removal while system is frozen
  libata: implement ATA_HORKAGE_NO_NCQ_TRIM and apply it to Micro M500 SSDs
  libata: disable a disk via libata.force params
  ahci: bail out on ICH6 before using AHCI BAR
  ahci: imx: Explicitly clear IMX6Q_GPR13_SATA_MPLL_CLK_EN
  libata: add ATA_HORKAGE_BROKEN_FPDMA_AA quirk for Seagate Momentus SpinPoint M8
2013-12-24 09:35:58 -08:00
Ard Biesheuvel f60900f260 auxvec.h: account for AT_HWCAP2 in AT_VECTOR_SIZE_BASE
Commit 2171364d1a ("powerpc: Add HWCAP2 aux entry") introduced a new
AT_ auxv entry type AT_HWCAP2 but failed to update AT_VECTOR_SIZE_BASE
accordingly.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Fixes: 2171364d1a (powerpc: Add HWCAP2 aux entry)
Cc: stable@vger.kernel.org
Acked-by: Michael Neuling <michael@neuling.org>
Cc: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-12-24 09:35:17 -08:00
Linus Torvalds b257bab5a6 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull SELinux fixes from James Morris.

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  selinux: selinux_setprocattr()->ptrace_parent() needs rcu_read_lock()
  selinux: fix broken peer recv check
2013-12-23 17:37:20 -08:00
Linus Torvalds dc0a6b4fee Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext2 fix from Jan Kara:
 "One simple fix of oops in ext2 which was recently hit by Christoph"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  ext2: Fix oops in ext2_get_block() called from ext2_quota_write()
2013-12-23 17:24:38 -08:00
Linus Torvalds 6961bc6c70 Last batch of InfiniBand/RDMA changes for 3.13 / 2014:
- Additional checks for uverbs to ensure forward compatibility, handle
    malformed input better.
  - Fix potential use-after-free in iWARP connection manager.
  - Make a function static.
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Merge tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband

Pull infiniband fixes from Roland Dreier:
 "Last batch of InfiniBand/RDMA changes for 3.13 / 2014:
   - Additional checks for uverbs to ensure forward compatibility,
     handle malformed input better.
   - Fix potential use-after-free in iWARP connection manager.
   - Make a function static"

* tag 'rdma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
  IB/uverbs: Check access to userspace response buffer in extended command
  IB/uverbs: Check input length in flow steering uverbs
  IB/uverbs: Set error code when fail to consume all flow_spec items
  IB/uverbs: Check reserved fields in create_flow
  IB/uverbs: Check comp_mask in destroy_flow
  IB/uverbs: Check reserved field in extended command header
  IB/uverbs: New macro to set pointers to NULL if length is 0 in INIT_UDATA()
  IB/core: const'ify inbuf in struct ib_udata
  RDMA/iwcm: Don't touch cm_id after deref in rem_ref
  RDMA/cxgb4: Make _c4iw_write_mem_dma() static
2013-12-23 17:23:42 -08:00
Oleg Nesterov c0c1439541 selinux: selinux_setprocattr()->ptrace_parent() needs rcu_read_lock()
selinux_setprocattr() does ptrace_parent(p) under task_lock(p),
but task_struct->alloc_lock doesn't pin ->parent or ->ptrace,
this looks confusing and triggers the "suspicious RCU usage"
warning because ptrace_parent() does rcu_dereference_check().

And in theory this is wrong, spin_lock()->preempt_disable()
doesn't necessarily imply rcu_read_lock() we need to access
the ->parent.

Reported-by: Evan McNabb <emcnabb@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paul Moore <pmoore@redhat.com>
2013-12-23 17:45:17 -05:00
Chad Hanson 46d01d6322 selinux: fix broken peer recv check
Fix a broken networking check. Return an error if peer recv fails.  If
secmark is active and the packet recv succeeds the peer recv error is
ignored.

Signed-off-by: Chad Hanson <chanson@trustedcs.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paul Moore <pmoore@redhat.com>
2013-12-23 17:45:17 -05:00
Linus Torvalds f5835372eb Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
 "Xmas fixes pull, all small nothing major, intel, radeon, one ttm
  regression, and one build fix"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/ttm: Fix swapin regression
  gpu: fix qxl missing crc32_le
  drm/radeon: fix asic gfx values for scrapper asics
  drm/i915: Use the correct GMCH_CTRL register for Sandybridge+
  drm/radeon: check for 0 count in speaker allocation and SAD code
  drm/radeon/dpm: disable ss on Cayman
  drm/radeon/dce6: set correct number of audio pins
  drm/i915: get a PC8 reference when enabling the power well
  drm/i915: change CRTC assertion on LCPLL disable
  drm/i915: Fix erroneous dereference of batch_obj inside reset_status
  drm/i915: Prevent double unref following alloc failure during execbuffer
2013-12-23 11:49:16 -08:00
Linus Torvalds a3981a52a2 Refactoring broke the balloon driver, and fixing kallsyms on ARM broke
some (non-ARM) MMUless setups, so we're making that fix ARM-only for now.
 
 Unfortunately, the ARM refactoring which broke kallsyms/perf was CC:stable,
 so the fix (which broken non-ARM) was also CC:stable, so now the partial
 reversion is also CC:stable...
 
 Cheers,
 Rusty.
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull virtio balloon driver fixes from Rusty Russell:
 "Refactoring broke the balloon driver, and fixing kallsyms on ARM broke
  some (non-ARM) MMUless setups, so we're making that fix ARM-only for
  now.

  Unfortunately, the ARM refactoring which broke kallsyms/perf was
  CC:stable, so the fix (which broken non-ARM) was also CC:stable, so
  now the partial reversion is also CC:stable..."

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  scripts/link-vmlinux.sh: only filter kernel symbols for arm
  virtio_balloon: update_balloon_size(): update correct field
2013-12-23 10:49:44 -08:00
Roland Dreier 22f12c60e1 Merge branches 'cxgb4', 'flowsteer' and 'misc' into for-linus 2013-12-23 09:19:02 -08:00
Dave Airlie 418cb50bd6 Merge tag 'drm-intel-fixes-2013-12-18' of git://people.freedesktop.org/~danvet/drm-intel into drm-fixes
Besides the 2 fixes for tricky corner cases in gem from Chris I've
promised already two patche from Paulo to fix pc8 warnings (both ported
from -next, bug report from Dave Jones) and one patch from to fix vga
enable/disable on snb+. That one is a really old bug, but apparently it
can cause machine hangs if you try hard enough with vgacon/efifb handover.

* tag 'drm-intel-fixes-2013-12-18' of git://people.freedesktop.org/~danvet/drm-intel:
  drm/i915: Use the correct GMCH_CTRL register for Sandybridge+
  drm/i915: get a PC8 reference when enabling the power well
  drm/i915: change CRTC assertion on LCPLL disable
  drm/i915: Fix erroneous dereference of batch_obj inside reset_status
  drm/i915: Prevent double unref following alloc failure during execbuffer
2013-12-23 10:35:57 +10:00
Dave Airlie 73e33c11b6 Merge branch 'drm-fixes-3.13' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
- fix for a long standing corruption bug on some Trinity/Richland parts.
- Stability fix for cayman dpm
- audio fixes for dce6+

* 'drm-fixes-3.13' of git://people.freedesktop.org/~agd5f/linux:
  drm/radeon: fix asic gfx values for scrapper asics
  drm/radeon: check for 0 count in speaker allocation and SAD code
  drm/radeon/dpm: disable ss on Cayman
  drm/radeon/dce6: set correct number of audio pins
2013-12-23 10:34:18 +10:00
Thomas Hellstrom 2e6d8b469b drm/ttm: Fix swapin regression
Commit "drm/ttm: Don't move non-existing data" didn't take the
swapped-out corner case into account. This patch corrects that.
Fixes blank screen after attempted suspend / hibernate on vmwgfx.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-12-23 10:33:07 +10:00
Randy Dunlap 488574dbc4 gpu: fix qxl missing crc32_le
Fix build error: qxl uses crc32 functions so it needs to select
CRC32.

Also use angle quotes around a kernel header file name.

drivers/built-in.o: In function `qxl_display_read_client_monitors_config':
(.text+0x19d754): undefined reference to `crc32_le'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2013-12-23 10:32:58 +10:00
Linus Torvalds 413541dd66 Linux 3.13-rc5 2013-12-22 13:08:32 -08:00
Linus Torvalds 93579aeec2 ARM: SoC fixes for 3.13-rc
Much smaller batch of fixes this week.
 
 Biggest one is a revert of an OMAP display change that removed some non-DT
 pinmux code that was still needed for 3.13 to get DSI displays to work.
 
 There's also a fix that resolves some misdescribed GPIO controller
 resources on shmobile. The rest are mostly smaller fixes, a couple of
 MAINTAINERS updates, etc.
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Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC fixes from Olof Johansson:
 "Much smaller batch of fixes this week.

  Biggest one is a revert of an OMAP display change that removed some
  non-DT pinmux code that was still needed for 3.13 to get DSI displays
  to work.

  There's also a fix that resolves some misdescribed GPIO controller
  resources on shmobile.  The rest are mostly smaller fixes, a couple of
  MAINTAINERS updates, etc"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  Revert "ARM: OMAP2+: Remove legacy mux code for display.c"
  MAINTAINERS: Add keystone clock drivers
  MAINTAINERS: Add keystone git tree information
  ARM: s3c64xx: dt: Fix boot failure due to double clock initialization
  ARM: shmobile: r8a7790: Fix GPIO resources in DTS
  irqchip: renesas-intc-irqpin: Fix register bitfield shift calculation
  ARM: shmobile: lager: phy fixup needs CONFIG_PHYLIB
2013-12-22 11:13:02 -08:00
Linus Torvalds ba8b844f1b A one-liner to reenable WRITE SAME over SBP-2 like in v3.8...v3.12.
Buggy targets which could malfunction when being subjected to this
 command are already sufficiently protected by a scsi_level check in
 sd + SCSI core.
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Merge tag 'firewire-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394

Pull firewire fixlet from Stefan Richter:
 "A one-liner to reenable WRITE SAME over SBP-2 like in v3.8...v3.12.
  Buggy targets which could malfunction when being subjected to this
  command are already sufficiently protected by a scsi_level check in sd
  + SCSI core"

* tag 'firewire-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
  firewire: sbp2: bring back WRITE SAME support
2013-12-22 11:11:57 -08:00
Linus Torvalds 1733348bd0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target fixes from Nicholas Bellinger:
 "Mostly minor items this time around, the most notable being a FILEIO
  backend change to enforce hw_max_sectors based upon the current
  block_size to address a bug where large sized I/Os (> 1M) where being
  rejected"

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  qla2xxx: Fix scsi_host leak on qlt_lport_register callback failure
  target: Remove extra percpu_ref_init
  target/file: Update hw_max_sectors based on current block_size
  iser-target: Move INIT_WORK setup into isert_create_device_ib_res
  iscsi-target: Fix incorrect np->np_thread NULL assignment
  qla2xxx: Fix schedule_delayed_work() for target timeout calculations
  iser-target: fix error return code in isert_create_device_ib_res()
  iscsi-target: Fix-up all zero data-length CDBs with R/W_BIT set
  target: Remove write-only stats fields and lock from struct se_node_acl
  iscsi-target: return -EINVAL on oversized configfs parameter
2013-12-22 11:11:20 -08:00
Linus Torvalds a8472b4bb1 Merge git://git.kvack.org/~bcrl/aio-next
Pull AIO leak fixes from Ben LaHaise:
 "I've put these two patches plus Linus's change through a round of
  tests, and it passes millions of iterations of the aio numa
  migratepage test, as well as a number of repetitions of a few simple
  read and write tests.

  The first patch fixes the memory leak Kent introduced, while the
  second patch makes aio_migratepage() much more paranoid and robust"

* git://git.kvack.org/~bcrl/aio-next:
  aio/migratepages: make aio migrate pages sane
  aio: fix kioctx leak introduced by "aio: Fix a trinity splat"
2013-12-22 11:03:49 -08:00
Linus Torvalds 3dc9acb676 aio: clean up and fix aio_setup_ring page mapping
Since commit 36bc08cc01 ("fs/aio: Add support to aio ring pages
migration") the aio ring setup code has used a special per-ring backing
inode for the page allocations, rather than just using random anonymous
pages.

However, rather than remembering the pages as it allocated them, it
would allocate the pages, insert them into the file mapping (dirty, so
that they couldn't be free'd), and then forget about them.  And then to
look them up again, it would mmap the mapping, and then use
"get_user_pages()" to get back an array of the pages we just created.

Now, not only is that incredibly inefficient, it also leaked all the
pages if the mmap failed (which could happen due to excessive number of
mappings, for example).

So clean it all up, making it much more straightforward.  Also remove
some left-overs of the previous (broken) mm_populate() usage that was
removed in commit d6c355c7da ("aio: fix race in ring buffer page
lookup introduced by page migration support") but left the pointless and
now misleading MAP_POPULATE flag around.

Tested-and-acked-by: Benjamin LaHaise <bcrl@kvack.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-12-22 11:03:08 -08:00
Jacob Pan ed93b71492 powercap / RAPL: add support for ValleyView Soc
This patch adds support for RAPL on Intel ValleyView based SoC
platforms, such as Baytrail.

Besides adding CPU ID, special energy unit encoding is handled
for ValleyView.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-22 01:27:51 +01:00
Masami Ichikawa c606850407 PM / sleep: Fix memory leak in pm_vt_switch_unregister().
kmemleak reported a memory leak as below.

unreferenced object 0xffff880118f14700 (size 32):
  comm "swapper/0", pid 1, jiffies 4294877401 (age 123.283s)
  hex dump (first 32 bytes):
    00 01 10 00 00 00 ad de 00 02 20 00 00 00 ad de  .......... .....
    00 d4 d2 18 01 88 ff ff 01 00 00 00 00 04 00 00  ................
  backtrace:
    [<ffffffff814edb1e>] kmemleak_alloc+0x4e/0xb0
    [<ffffffff811889dc>] kmem_cache_alloc_trace+0x1ec/0x260
    [<ffffffff810aba66>] pm_vt_switch_required+0x76/0xb0
    [<ffffffff812f39f5>] register_framebuffer+0x195/0x320
    [<ffffffff8130af18>] efifb_probe+0x718/0x780
    [<ffffffff81391495>] platform_drv_probe+0x45/0xb0
    [<ffffffff8138f407>] driver_probe_device+0x87/0x3a0
    [<ffffffff8138f7f3>] __driver_attach+0x93/0xa0
    [<ffffffff8138d413>] bus_for_each_dev+0x63/0xa0
    [<ffffffff8138ee5e>] driver_attach+0x1e/0x20
    [<ffffffff8138ea40>] bus_add_driver+0x180/0x250
    [<ffffffff8138fe74>] driver_register+0x64/0xf0
    [<ffffffff813913ba>] __platform_driver_register+0x4a/0x50
    [<ffffffff8191e028>] efifb_driver_init+0x12/0x14
    [<ffffffff8100214a>] do_one_initcall+0xfa/0x1b0
    [<ffffffff818e40e0>] kernel_init_freeable+0x17b/0x201

In pm_vt_switch_required(), "entry" variable is allocated via kmalloc().
So, in pm_vt_switch_unregister(), it needs to call kfree() when object
is deleted from list.

Signed-off-by: Masami Ichikawa <masami256@gmail.com>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-22 00:56:35 +01:00
Jason Baron a27a9ab706 cpufreq: Use CONFIG_CPU_FREQ_DEFAULT_* to set initial policy for setpolicy drivers
When configuring a default governor (via CONFIG_CPU_FREQ_DEFAULT_*) with the
intel_pstate driver, the desired default policy is not properly set. For
example, setting 'CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE' ends up with the
'powersave' policy being set.

Fix by configuring the correct default policy, if either 'powersave' or
'performance' are requested. Otherwise, fallback to what the driver originally
set via its 'init' routine.

Signed-off-by: Jason Baron <jbaron@akamai.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-22 00:51:52 +01:00
Viresh Kumar 42f921a6f1 cpufreq: remove sysfs files for CPUs which failed to come back after resume
There are cases where cpufreq_add_dev() may fail for some CPUs
during system resume. With the current code we will still have
sysfs cpufreq files for those CPUs and struct cpufreq_policy
would be already freed for them. Hence any operation on those
sysfs files would result in kernel warnings.

Example of problems resulting from resume errors (from Bjørn Mork):

WARNING: CPU: 0 PID: 6055 at fs/sysfs/file.c:343 sysfs_open_file+0x77/0x212()
missing sysfs attribute operations for kobject: (null)
Modules linked in: [stripped as irrelevant]
CPU: 0 PID: 6055 Comm: grep Tainted: G      D      3.13.0-rc2 #153
Hardware name: LENOVO 2776LEG/2776LEG, BIOS 6EET55WW (3.15 ) 12/19/2011
 0000000000000009 ffff8802327ebb78 ffffffff81380b0e 0000000000000006
 ffff8802327ebbc8 ffff8802327ebbb8 ffffffff81038635 0000000000000000
 ffffffff811823c7 ffff88021a19e688 ffff88021a19e688 ffff8802302f9310
Call Trace:
 [<ffffffff81380b0e>] dump_stack+0x55/0x76
 [<ffffffff81038635>] warn_slowpath_common+0x7c/0x96
 [<ffffffff811823c7>] ? sysfs_open_file+0x77/0x212
 [<ffffffff810386e3>] warn_slowpath_fmt+0x41/0x43
 [<ffffffff81182dec>] ? sysfs_get_active+0x6b/0x82
 [<ffffffff81182382>] ? sysfs_open_file+0x32/0x212
 [<ffffffff811823c7>] sysfs_open_file+0x77/0x212
 [<ffffffff81182350>] ? sysfs_schedule_callback+0x1ac/0x1ac
 [<ffffffff81122562>] do_dentry_open+0x17c/0x257
 [<ffffffff8112267e>] finish_open+0x41/0x4f
 [<ffffffff81130225>] do_last+0x80c/0x9ba
 [<ffffffff8112dbbd>] ? inode_permission+0x40/0x42
 [<ffffffff81130606>] path_openat+0x233/0x4a1
 [<ffffffff81130b7e>] do_filp_open+0x35/0x85
 [<ffffffff8113b787>] ? __alloc_fd+0x172/0x184
 [<ffffffff811232ea>] do_sys_open+0x6b/0xfa
 [<ffffffff811233a7>] SyS_openat+0xf/0x11
 [<ffffffff8138c812>] system_call_fastpath+0x16/0x1b

To fix this, remove those sysfs files or put the associated kobject
in case of such errors. Also, to make it simple, remove the cpufreq
sysfs links from all the CPUs (except for the policy->cpu) during
suspend, as that operation won't result in a loss of sysfs file
permissions and we can create those links during resume just fine.

Fixes: 5302c3fb2e ("cpufreq: Perform light-weight init/teardown during suspend/resume")
Reported-and-tested-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: 3.12+ <stable@vger.kernel.org> # 3.12+
[rjw: Changelog]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-12-22 00:47:46 +01:00
Benjamin LaHaise 8e321fefb0 aio/migratepages: make aio migrate pages sane
The arbitrary restriction on page counts offered by the core
migrate_page_move_mapping() code results in rather suspicious looking
fiddling with page reference counts in the aio_migratepage() operation.
To fix this, make migrate_page_move_mapping() take an extra_count parameter
that allows aio to tell the code about its own reference count on the page
being migrated.

While cleaning up aio_migratepage(), make it validate that the old page
being passed in is actually what aio_migratepage() expects to prevent
misbehaviour in the case of races.

Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
2013-12-21 17:56:08 -05:00
Benjamin LaHaise 1881686f84 aio: fix kioctx leak introduced by "aio: Fix a trinity splat"
e34ecee2ae reworked the percpu reference
counting to correct a bug trinity found.  Unfortunately, the change lead
to kioctxes being leaked because there was no final reference count to
put.  Add that reference count back in to fix things.

Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Cc: stable@vger.kernel.org
2013-12-21 15:57:09 -05:00
Matias Bjørling fc1bc35443 null_blk: support submit_queues on use_per_node_hctx
In the case of both the submit_queues param and use_per_node_hctx param
are used. We limit the number af submit_queues to the number of online
nodes.

If the submit_queues is a multiple of nr_online_nodes, its trivial. Simply map
them to the nodes. For example: 8 submit queues are mapped as node0[0,1],
node1[2,3], ...
If uneven, we are left with an uneven number of submit_queues that must be
mapped. These are mapped toward the first node and onward. E.g. 5
submit queues mapped onto 4 nodes are mapped as node0[0,1], node1[2], ...

Signed-off-by: Matias Bjorling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-12-21 09:30:34 -07:00
Matias Bjørling 200052440d null_blk: set use_per_node_hctx param to false
The defaults for the module is to instantiate itself with blk-mq and a
submit queue for each CPU node in the system.

To save resources, initialize instead with a single submit queue.

Signed-off-by: Matias Bjorling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-12-21 09:30:33 -07:00
Matias Bjørling 89ed05eea0 null_blk: corrections to documentation
Randy Dunlap reported a couple of grammar errors and unfortunate usages of
socket/node/core.

Signed-off-by: Matias Bjorling <m@bjorling.me>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2013-12-21 09:30:33 -07:00
Linus Torvalds b7000adef1 Don't set the INITRD_COMPRESS environment variable automatically
Commit 1bf49dd4be ("./Makefile: export initial ramdisk compression
config option") started setting the INITRD_COMPRESS environment variable
depending on which decompression models the kernel had available.

That is completely broken.

For example, we by default have CONFIG_RD_LZ4 enabled, and are able to
decompress such an initrd, but the user tools to *create* such an initrd
may not be availble.  So trying to tell dracut to generate an
lz4-compressed image just because we can decode such an image is
completely inappropriate.

Cc: J P <ppandit@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-12-20 16:52:45 -08:00
Linus Torvalds a6ddeee32d xfs: bugfixes for 3.13-rc5
- fix memory leak in xfs_dir2_node_removename
 - fix quota assertion in xfs_setattr_size
 - fix quota assertions in xfs_qm_vop_create_dqattach
 - fix for hang when disabling group and project quotas before
   disabling user quotas
 - fix Dave Chinner's email address in MAINTAINERS
 - fix for file allocation alignment
 - fix for assertion in xfs_buf_stale by removing xfsbdstrat
 - fix for alignment with swalloc mount option
 - fix for "retry forever" semantics on IO errors
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Merge tag 'xfs-for-linus-v3.13-rc5' of git://oss.sgi.com/xfs/xfs

Pull xfs bugfixes from Ben Myers:
 "This contains fixes for some asserts
   related to project quotas, a memory leak, a hang when disabling group or
   project quotas before disabling user quotas, Dave's email address, several
   fixes for the alignment of file allocation to stripe unit/width geometry, a
   fix for an assertion with xfs_zero_remaining_bytes, and the behavior of
   metadata writeback in the face of IO errors.

   Details:
   - fix memory leak in xfs_dir2_node_removename
   - fix quota assertion in xfs_setattr_size
   - fix quota assertions in xfs_qm_vop_create_dqattach
   - fix for hang when disabling group and project quotas before
     disabling user quotas
   - fix Dave Chinner's email address in MAINTAINERS
   - fix for file allocation alignment
   - fix for assertion in xfs_buf_stale by removing xfsbdstrat
   - fix for alignment with swalloc mount option
   - fix for "retry forever" semantics on IO errors"

* tag 'xfs-for-linus-v3.13-rc5' of git://oss.sgi.com/xfs/xfs:
  xfs: abort metadata writeback on permanent errors
  xfs: swalloc doesn't align allocations properly
  xfs: remove xfsbdstrat error
  xfs: align initial file allocations correctly
  MAINTAINERS: fix incorrect mail address of XFS maintainer
  xfs: fix infinite loop by detaching the group/project hints from user dquot
  xfs: fix assertion failure at xfs_setattr_nonsize
  xfs: fix false assertion at xfs_qm_vop_create_dqattach
  xfs: fix memory leak in xfs_dir2_node_removename
2013-12-20 15:48:45 -08:00
Olof Johansson 40b64acd17 mm: fix build of split ptlock code
Commit 597d795a2a ('mm: do not allocate page->ptl dynamically, if
spinlock_t fits to long') restructures some allocators that are compiled
even if USE_SPLIT_PTLOCKS arn't used.  It results in compilation
failure:

  mm/memory.c:4282:6: error: 'struct page' has no member named 'ptl'
  mm/memory.c:4288:12: error: 'struct page' has no member named 'ptl'

Add in the missing ifdef.

Fixes: 597d795a2a ('mm: do not allocate page->ptl dynamically, if spinlock_t fits to long')
Signed-off-by: Olof Johansson <olof@lixom.net>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-12-20 15:41:27 -08:00
Linus Torvalds 4773ef2241 syscall table busted due to unistd header inclusion issue
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Merge tag 'arc-fixes-for-3.13-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc

Pull ARC fix from Vineet Gupta:
 "Fix busted syscall table due to unistd header inclusion issue"

* tag 'arc-fixes-for-3.13-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: Allow conditional multiple inclusion of uapi/asm/unistd.h
2013-12-20 13:50:42 -08:00
Linus Torvalds a81ce79bf2 - arm64 ptrace fix.
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 ptrace fix from Catalin Marinas.

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: ptrace: avoid using HW_BREAKPOINT_EMPTY for disabled events
2013-12-20 13:50:08 -08:00
Luck, Tony df36ac1bc2 pstore: Don't allow high traffic options on fragile devices
Some pstore backing devices use on board flash as persistent
storage. These have limited numbers of write cycles so it
is a poor idea to use them from high frequency operations.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-12-20 13:12:01 -08:00
Linus Torvalds eaadcfeb31 dmaengine fixes for 3.13-rc4
1/ Deprecation of net_dma to be removed in 3.14
 
 2/ Crash regression fix in pl330 from the dmaengine_unmap rework
 
 3/ Crash regression fix for any channel running raid ops without
    CONFIG_ASYNC_TX_DMA from dmaengine_unmap
 
 4/ Memory leak regression in mv_xor from dmaengine_unmap
 
 5/ Build warning regressions in mv_xor, fsldma, ppc4xx, txx9, and
    at_hdmac from dmaengine_unmap
 
 6/ Sleep in atomic regression in dma_async_memcpy_pg_to_pg
 
 7/ New fix in mv_xor for handling channel initialization failures
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Merge tag 'dmaengine-fixes-3.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine

Pull dmaengine fixes from Dan Williams:

 - deprecation of net_dma to be removed in 3.14

 - crash regression fix in pl330 from the dmaengine_unmap rework

 - crash regression fix for any channel running raid ops without
   CONFIG_ASYNC_TX_DMA from dmaengine_unmap

 - memory leak regression in mv_xor from dmaengine_unmap

 - build warning regressions in mv_xor, fsldma, ppc4xx, txx9, and
   at_hdmac from dmaengine_unmap

 - sleep in atomic regression in dma_async_memcpy_pg_to_pg

 - new fix in mv_xor for handling channel initialization failures

* tag 'dmaengine-fixes-3.13-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/dmaengine:
  net_dma: mark broken
  dma: pl330: ensure DMA descriptors are zero-initialised
  dmaengine: fix sleep in atomic
  dmaengine: mv_xor: fix oops when channels fail to initialise
  dma: mv_xor: Use dmaengine_unmap_data for the self-tests
  dmaengine: fix enable for high order unmap pools
  dma: fix build warnings in txx9
  dmatest: fix build warning on mips
  dma: fix fsldma build warnings
  dma: fix build warnings in ppc4xx
  dmaengine: at_hdmac: remove unused function
  dma: mv_xor: remove mv_desc_get_dest_addr()
2013-12-20 12:27:41 -08:00
Linus Torvalds 46dd0835ca The PPC folks had a large amount of changes queued for 3.13, and now they
are fixing the bugs.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM fixes from Paolo Bonzini:
 "The PPC folks had a large amount of changes queued for 3.13, and now
  they are fixing the bugs"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: PPC: Book3S HV: Don't drop low-order page address bits
  powerpc: book3s: kvm: Don't abuse host r2 in exit path
  powerpc/kvm/booke: Fix build break due to stack frame size warning
  KVM: PPC: Book3S: PR: Enable interrupts earlier
  KVM: PPC: Book3S: PR: Make svcpu -> vcpu store preempt savvy
  KVM: PPC: Book3S: PR: Export kvmppc_copy_to|from_svcpu
  KVM: PPC: Book3S: PR: Don't clobber our exit handler id
  powerpc: kvm: fix rare but potential deadlock scene
  KVM: PPC: Book3S HV: Take SRCU read lock around kvm_read_guest() call
  KVM: PPC: Book3S HV: Make tbacct_lock irq-safe
  KVM: PPC: Book3S HV: Refine barriers in guest entry/exit
  KVM: PPC: Book3S HV: Fix physical address calculations
2013-12-20 12:26:54 -08:00
Kirill A. Shutemov 597d795a2a mm: do not allocate page->ptl dynamically, if spinlock_t fits to long
In struct page we have enough space to fit long-size page->ptl there,
but we use dynamically-allocated page->ptl if size(spinlock_t) is larger
than sizeof(int).

It hurts 64-bit architectures with CONFIG_GENERIC_LOCKBREAK, where
sizeof(spinlock_t) == 8, but it easily fits into struct page.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-12-20 12:25:45 -08:00
Johannes Weiner fff4068cba mm: page_alloc: revert NUMA aspect of fair allocation policy
Commit 81c0a2bb51 ("mm: page_alloc: fair zone allocator policy") meant
to bring aging fairness among zones in system, but it was overzealous
and badly regressed basic workloads on NUMA systems.

Due to the way kswapd and page allocator interacts, we still want to
make sure that all zones in any given node are used equally for all
allocations to maximize memory utilization and prevent thrashing on the
highest zone in the node.

While the same principle applies to NUMA nodes - memory utilization is
obviously improved by spreading allocations throughout all nodes -
remote references can be costly and so many workloads prefer locality
over memory utilization.  The original change assumed that
zone_reclaim_mode would be a good enough predictor for that, but it
turned out to be as indicative as a coin flip.

Revert the NUMA aspect of the fairness until we can find a proper way to
make it configurable and agree on a sane default.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: <stable@kernel.org> # 3.12
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-12-20 12:19:18 -08:00
Mel Gorman 8798cee2f9 Revert "mm: page_alloc: exclude unreclaimable allocations from zone fairness policy"
This reverts commit 73f038b863.  The NUMA behaviour of this patch is
less than ideal.  An alternative approch is to interleave allocations
only within local zones which is implemented in the next patch.

Cc: stable@vger.kernel.org
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-12-20 12:19:18 -08:00
Kirill A. Shutemov ee53664bda mm: Fix NULL pointer dereference in madvise(MADV_WILLNEED) support
Sasha Levin found a NULL pointer dereference that is due to a missing
page table lock, which in turn is due to the pmd entry in question being
a transparent huge-table entry.

The code - introduced in commit 1998cc0489 ("mm: make
madvise(MADV_WILLNEED) support swap file prefetch") - correctly checks
for this situation using pmd_none_or_trans_huge_or_clear_bad(), but it
turns out that that function doesn't work correctly.

pmd_none_or_trans_huge_or_clear_bad() expected that pmd_bad() would
trigger if the transparent hugepage bit was set, but it doesn't do that
if pmd_numa() is also set. Note that the NUMA bit only gets set on real
NUMA machines, so people trying to reproduce this on most normal
development systems would never actually trigger this.

Fix it by removing the very subtle (and subtly incorrect) expectation,
and instead just checking pmd_trans_huge() explicitly.

Reported-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
[ Additionally remove the now stale test for pmd_trans_huge() inside the
  pmd_bad() case - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-12-20 12:17:03 -08:00
Kevin Hilman 95fcfa70f3 Renesas ARM based SoC fixes for v3.13
* r8a7790 (R-Car H1) SoC
   - Correct GPIO resources in DT.
 
     This problem has been present since GPIOs were added to the r8a7790 SoC
     by f98e10c88a ("ARM: shmobile: r8a7790: Add GPIO controller
     devices to device tree") in v3.12-rc1.
 
 * irqchip renesas-intc-irqpin
   - Correct register bitfield shift calculation
 
     This bug has been present since the renesas-intc-irqpin driver was
     introduced by 443580486e ("irqchip: Renesas INTC External IRQ pin
     driver") in v3.10-rc1
 
 * Lager board
   - Do not build the phy fixup unless CONFIG_PHYLIB is enabled
 
     This problem was introduced by 48c8b96f21
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Merge tag 'renesas-fixes-for-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into fixes

From Simon Horman:
Renesas ARM based SoC fixes for v3.13

* r8a7790 (R-Car H1) SoC
  - Correct GPIO resources in DT.

    This problem has been present since GPIOs were added to the r8a7790 SoC
    by f98e10c88a ("ARM: shmobile: r8a7790: Add GPIO controller
    devices to device tree") in v3.12-rc1.

* irqchip renesas-intc-irqpin
  - Correct register bitfield shift calculation

    This bug has been present since the renesas-intc-irqpin driver was
    introduced by 443580486e ("irqchip: Renesas INTC External IRQ pin
    driver") in v3.10-rc1

* Lager board
  - Do not build the phy fixup unless CONFIG_PHYLIB is enabled

    This problem was introduced by 48c8b96f21

* tag 'renesas-fixes-for-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: r8a7790: Fix GPIO resources in DTS
  irqchip: renesas-intc-irqpin: Fix register bitfield shift calculation
  ARM: shmobile: lager: phy fixup needs CONFIG_PHYLIB

Signed-off-by: Kevin Hilman <khilman@linaro.org>
2013-12-20 11:28:30 -08:00
Yann Droneaud 6cc3df840a IB/uverbs: Check access to userspace response buffer in extended command
This patch adds a check on the output buffer with access_ok(VERIFY_WRITE, ...)
to ensure the whole buffer is in userspace memory before using the
pointer in uverbs functions.  If the buffer or a subset of it is not
valid, returns -EFAULT to the caller.

This will also catch invalid buffer before the final call to
copy_to_user() which happen late in most uverb functions.

Just like the check in read(2) syscall, it's a sanity check to detect
invalid parameters provided by userspace. This particular check was added
in vfs_read() by Linus Torvalds for v2.6.12 with following commit message:

https://git.kernel.org/cgit/linux/kernel/git/tglx/history.git/commit/?id=fd770e66c9a65b14ce114e171266cf6f393df502

  Make read/write always do the full "access_ok()" tests.

  The actual user copy will do them too, but only for the
  range that ends up being actually copied. That hides
  bugs when the range has been clamped by file size or other
  issues.

Note: there's no need to check input buffer since vfs_write() already does
access_ok(VERIFY_READ, ...) as part of write() syscall.

Link: http://marc.info/?i=cover.1387273677.git.ydroneaud@opteya.com
Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2013-12-20 10:54:34 -08:00