Commit Graph

400867 Commits

Author SHA1 Message Date
Mark Brown
0705690110 Merge remote-tracking branch 'asoc/topic/dapm' into asoc-next 2013-10-24 11:24:03 +01:00
Mark Brown
85eb5dce82 Merge remote-tracking branch 'asoc/topic/cs42l73' into asoc-next 2013-10-24 11:24:03 +01:00
Mark Brown
05be686a40 Merge remote-tracking branch 'asoc/topic/cs4271' into asoc-next 2013-10-24 11:24:02 +01:00
Mark Brown
f8736ad2ee Merge remote-tracking branch 'asoc/topic/cq93vc' into asoc-next 2013-10-24 11:24:02 +01:00
Mark Brown
d6ee232c7f Merge remote-tracking branch 'asoc/topic/core' into asoc-next 2013-10-24 11:24:02 +01:00
Mark Brown
6180561670 Merge remote-tracking branch 'asoc/topic/component' into asoc-next 2013-10-24 11:24:01 +01:00
Mark Brown
d1c59c8712 Merge remote-tracking branch 'asoc/topic/bclk' into asoc-next 2013-10-24 11:24:01 +01:00
Mark Brown
80ca31869f Merge remote-tracking branch 'asoc/topic/atmel' into asoc-next 2013-10-24 11:24:00 +01:00
Mark Brown
c4c2361aef Merge remote-tracking branch 'asoc/topic/arizona' into asoc-next 2013-10-24 11:24:00 +01:00
Mark Brown
805c605562 Merge remote-tracking branch 'asoc/topic/ak4642' into asoc-next 2013-10-24 11:23:59 +01:00
Mark Brown
bb80a5d4cd Merge remote-tracking branch 'asoc/topic/ak4104' into asoc-next 2013-10-24 11:23:59 +01:00
Mark Brown
e447360474 Merge remote-tracking branch 'asoc/topic/adav80x' into asoc-next 2013-10-24 11:23:58 +01:00
Mark Brown
9c5ff908aa Merge remote-tracking branch 'asoc/topic/adau1373' into asoc-next 2013-10-24 11:23:58 +01:00
Mark Brown
de3bb2ded6 Merge remote-tracking branch 'asoc/topic/ab8500' into asoc-next 2013-10-24 11:23:57 +01:00
Mark Brown
cbf125e211 Merge remote-tracking branch 'asoc/topic/88pm860x' into asoc-next 2013-10-24 11:23:57 +01:00
Mark Brown
b85e95781c Merge remote-tracking branch 'asoc/fix/tlv320aic3x' into asoc-linus 2013-10-24 11:23:56 +01:00
Mark Brown
ebc0b38625 Merge remote-tracking branch 'asoc/fix/rcar' into asoc-linus 2013-10-24 11:23:56 +01:00
Mark Brown
3bd36a147f Merge remote-tracking branch 'asoc/fix/pcm1792a' into asoc-linus 2013-10-24 11:23:55 +01:00
Mark Brown
dfbbe16f14 Merge remote-tracking branch 'asoc/fix/pcm1681' into asoc-linus 2013-10-24 11:23:55 +01:00
Mark Brown
92359d6d65 Merge remote-tracking branch 'asoc/fix/omap' into asoc-linus 2013-10-24 11:23:55 +01:00
Mark Brown
686b377152 Merge remote-tracking branch 'asoc/fix/fsl' into asoc-linus 2013-10-24 11:23:54 +01:00
Vinod Koul
30a765d643 ASoC: dont call dapm_sync while reporting jack always
While reporting the jack status snd_soc_jack_report() invokes snd_soc_dapm_sync()
always. This should be required when we have pins associated with jack and
reporting enables or disables these.
So add a check for this case

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-10-22 09:29:02 +01:00
Brian Austin
7b09eea529 ASoC: cs42l73: Add Device Tree support for CS42L73
This patch adds support for device tree for the CS42L73 CODEC

Signed-off-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-10-20 18:15:44 +01:00
Linus Torvalds
31d141e3a6 Linux 3.12-rc6 2013-10-19 12:28:15 -07:00
Linus Torvalds
bdeeab62a6 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fix from Chris Mason:
 "Sage hit a deadlock with ceph on btrfs, and Josef tracked it down to a
  regression in our initial rc1 pull.  When doing nocow writes we were
  sometimes starting a transaction with locks held"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  Btrfs: release path before starting transaction in can_nocow_extent
2013-10-18 16:46:21 -07:00
Linus Torvalds
797afdf708 ACPI and power management fixes for 3.12-rc6
- intel_pstate fix for misbehavior after system resume if sysfs
    attributes are set in a specific way before the corresponding
    suspend from Dirk Brandewie.
 
  - A recent intel_pstate fix has no effect if unsigned long is 32-bit,
    so fix it up to cover that case as well.
 
  - The s3c64xx cpufreq driver was not updated when the index field of
    struct cpufreq_frequency_table was replaced with driver_data, so
    update it now.  From Charles Keepax.
 
  - The Kconfig help text for ACPI_BUTTON still refers to /proc/acpi/event
    that has been dropped recently, so modify it to remove that reference.
    From Krzysztof Mazur.
 
  - A Lan Tianyu's change adds a missing mutex unlock to an error code
    path in acpi_resume_power_resources().
 
  - Some code related to ACPI power resources, whose very purpose is
    questionable to put it lightly, turns out to cause problems to
    happen during testing on real systems, so remove it completely
    (we may revisit that in the future if there's a compelling enough
    reason).  From Rafael J Wysocki and Aaron Lu.
 
 /
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Merge tag 'pm+acpi-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI and power management fixes from Rafael Wysocki:

 - intel_pstate fix for misbehavior after system resume if sysfs
   attributes are set in a specific way before the corresponding suspend
   from Dirk Brandewie.

 - A recent intel_pstate fix has no effect if unsigned long is 32-bit,
   so fix it up to cover that case as well.

 - The s3c64xx cpufreq driver was not updated when the index field of
   struct cpufreq_frequency_table was replaced with driver_data, so
   update it now.  From Charles Keepax.

 - The Kconfig help text for ACPI_BUTTON still refers to
   /proc/acpi/event that has been dropped recently, so modify it to
   remove that reference.  From Krzysztof Mazur.

 - A Lan Tianyu's change adds a missing mutex unlock to an error code
   path in acpi_resume_power_resources().

 - Some code related to ACPI power resources, whose very purpose is
   questionable to put it lightly, turns out to cause problems to happen
   during testing on real systems, so remove it completely (we may
   revisit that in the future if there's a compelling enough reason).
   From Rafael J Wysocki and Aaron Lu.

* tag 'pm+acpi-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI / PM: Drop two functions that are not used any more
  ATA / ACPI: remove power dependent device handling
  cpufreq: s3c64xx: Rename index to driver_data
  ACPI / power: Drop automaitc resume of power resource dependent devices
  intel_pstate: Fix type mismatch warning
  cpufreq / intel_pstate: Fix max_perf_pct on resume
  ACPI: remove /proc/acpi/event from ACPI_BUTTON help
  ACPI / power: Release resource_lock after acpi_power_get_state() return error
2013-10-18 14:26:51 -07:00
Linus Torvalds
9219cec5f2 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "Two fixlets:

   - fix a (rare-config) build bug
   - fix a next-gen SGI/UV hw/firmware enumeration bug"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Update UV3 hub revision ID
  x86/microcode: Correct Kconfig dependencies
2013-10-18 12:25:11 -07:00
Josef Bacik
1bda19eb73 Btrfs: release path before starting transaction in can_nocow_extent
We can't be holding tree locks while we try to start a transaction, we will
deadlock.  Thanks,

Reported-by: Sage Weil <sage@inktank.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
2013-10-18 12:43:40 -04:00
Rafael J. Wysocki
981984cbd0 Merge branch 'acpi-fixes'
* acpi-fixes:
  ACPI / PM: Drop two functions that are not used any more
  ATA / ACPI: remove power dependent device handling
  ACPI / power: Drop automaitc resume of power resource dependent devices
  ACPI: remove /proc/acpi/event from ACPI_BUTTON help
  ACPI / power: Release resource_lock after acpi_power_get_state() return error
2013-10-18 13:42:10 +02:00
Rafael J. Wysocki
bdbff71653 Merge branch 'pm-fixes'
* pm-fixes:
  cpufreq: s3c64xx: Rename index to driver_data
  intel_pstate: Fix type mismatch warning
  cpufreq / intel_pstate: Fix max_perf_pct on resume
2013-10-18 13:41:56 +02:00
Linus Torvalds
04919afb85 Merge branch 'for-linus' of git://git.samba.org/sfrench/cifs-2.6
Pull CIFS fixes from Steve French:
 "Five small cifs fixes (includes fixes for: unmount hang, 2 security
  related, symlink, large file writes)"

* 'for-linus' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: ntstatus_to_dos_map[] is not terminated
  cifs: Allow LANMAN auth method for servers supporting unencapsulated authentication methods
  cifs: Fix inability to write files >2GB to SMB2/3 shares
  cifs: Avoid umount hangs with smb2 when server is unresponsive
  do not treat non-symlink reparse points as valid symlinks
2013-10-17 18:49:21 -07:00
Kuninori Morimoto
6833c452c2 ASoC: add snd_soc_of_get_dai_name() default of_xlate
Current snd_soc_of_get_dai_name() needs .of_xlate_dai_name()
callback on each component drivers.
But required behavior on almost all these drivers is
just returns its indexed driver's name.

This patch adds this feature as default behavior.
.of_xlate_dai_name() can overwrite it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-10-18 00:43:32 +01:00
Brian Austin
f9ca060680 ASoC: cs42l73: Namespace defines for cs42l73 codec
Cleanup to namespace the defines for the cs42l73 driver

Signed-off-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-10-18 00:37:29 +01:00
Brian Austin
3d8c8bc025 ASoC: cs42l73: Add platform data support for cs42l73 codec
Add support for RST GPIO and Charge Pump Freq in platform data

Signed-off-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-10-18 00:37:29 +01:00
Linus Torvalds
83f11a9cf2 Driver core fix for 3.12-rc6
Here is one fix for the hotplug memory path that resolves a regression
 when removing memory that showed up in 3.12-rc1.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core fix from Greg KH:
 "Here is one fix for the hotplug memory path that resolves a regression
  when removing memory that showed up in 3.12-rc1"

* tag 'driver-core-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  driver core: Release device_hotplug_lock when store_mem_state returns EINVAL
2013-10-17 10:39:01 -07:00
Linus Torvalds
02a3250fd3 USB fixes for 3.12-rc6
Here are some USB fixes and new device ids for 3.12-rc6
 
 The largest change here is a bunch of new device ids for the option USB
 serial driver for new Huawei devices.  Other than that, just some small
 bug fixes for issues that people have reported (run-time and
 build-time), nothing major.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are some USB fixes and new device ids for 3.12-rc6

  The largest change here is a bunch of new device ids for the option
  USB serial driver for new Huawei devices.  Other than that, just some
  small bug fixes for issues that people have reported (run-time and
  build-time), nothing major"

* tag 'usb-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: usb_phy_gen: refine conditional declaration of usb_nop_xceiv_register
  usb: misc: usb3503: Fix compile error due to incorrect regmap depedency
  usb/chipidea: fix oops on memory allocation failure
  usb-storage: add quirk for mandatory READ_CAPACITY_16
  usb: serial: option: blacklist Olivetti Olicard200
  USB: quirks: add touchscreen that is dazzeled by remote wakeup
  Revert "usb: musb: gadget: fix otg active status flag"
  USB: quirks.c: add one device that cannot deal with suspension
  USB: serial: option: add support for Inovia SEW858 device
  USB: serial: ti_usb_3410_5052: add Abbott strip port ID to combined table as well.
  USB: support new huawei devices in option.c
  usb: musb: start musb on the udc side, too
  xhci: Fix spurious wakeups after S5 on Haswell
  xhci: fix write to USB3_PSSEN and XUSB2PRM pci config registers
  xhci: quirk for extra long delay for S4
  xhci: Don't enable/disable RWE on bus suspend/resume.
2013-10-17 10:38:18 -07:00
Linus Torvalds
7b4a515509 Serial driver fixes for 3.12-rc6
Here are two serial driver fixes for your tree.  One is a revert of a
 patch that causes a build error, the other is a fix to provide the
 correct brace placement which resolves a bug where the driver was not
 working properly.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull serial driver fixes from Greg KH:
 "Here are two serial driver fixes for your tree.  One is a revert of a
  patch that causes a build error, the other is a fix to provide the
  correct brace placement which resolves a bug where the driver was not
  working properly"

* tag 'tty-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: vt8500: add missing braces
  Revert "serial: i.MX: evaluate linux,stdout-path property"
2013-10-17 10:37:42 -07:00
Linus Torvalds
66eb411ea2 Char / misc driver fixes for 3.12-rc6
Here are some small iio and w1 driver fixes for 3.12-rc6.
 
 There is also a hyper-v fix in here, which turned out to be incorrect,
 so it was reverted.  That will probably have to wait unto 3.13-rc1 to
 get accepted as it's still being discussed.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are some small iio and w1 driver fixes for 3.12-rc6.

  There is also a hyper-v fix in here, which turned out to be incorrect,
  so it was reverted.  That will probably have to wait unto 3.13-rc1 to
  get accepted as it's still being discussed"

* tag 'char-misc-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  Revert "Drivers: hv: vmbus: Fix a bug in channel rescind code"
  Drivers: hv: vmbus: Fix a bug in channel rescind code
  iio:buffer: Free active scan mask in iio_disable_all_buffers()
  iio: frequency: adf4350: add missing clk_disable_unprepare() on error in adf4350_probe()
  w1 - call request_module with w1 master mutex unlocked
  w1 - fix fops in w1_bus_notify
2013-10-17 10:36:57 -07:00
Linus Torvalds
630db0e3d2 sound fixes for 3.12-rc6
All reasonably small fixes as rc6: a HD-audio mic fix, a us122l mmap
 regression fix, and kernel memory leak fix in hdsp driver.
 Hopefully this will be the last pull request for 3.12...
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Merge tag 'sound-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "All reasonably small fixes as rc6: a HD-audio mic fix, a us122l mmap
  regression fix, and kernel memory leak fix in hdsp driver.  Hopefully
  this will be the last pull request for 3.12..."

* tag 'sound-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hdsp - info leak in snd_hdsp_hwdep_ioctl()
  ALSA: us122l: Fix pcm_usb_stream mmapping regression
  ALSA: hda - Fix inverted internal mic not indicated on some machines
2013-10-17 10:17:25 -07:00
Linus Torvalds
b2118ea971 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull apparmor fixes from James Morris:
 "A couple more regressions fixed"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
  apparmor: fix bad lock balance when introspecting policy
  apparmor: fix memleak of the profile hash
2013-10-17 10:16:45 -07:00
Greg Kroah-Hartman
e13cef8ded Third set of IIO fixes for the 3.12 cycle.
Two little ones this time:
 
 1) A missing clk_unprepare in adf4350.
 2) A missing free of the active_scan_mask when iio_disable_all_buffers is
 called during an unexpected device removal.  This leak was introduced by
 the fix
 a87c82e454 iio: Stop sampling when the device is removed
 and hence is a regression fix.
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Merge tag 'iio-fixes-for-3.12c' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-linus

Jonathan writes:

Third set of IIO fixes for the 3.12 cycle.

Two little ones this time:

1) A missing clk_unprepare in adf4350.
2) A missing free of the active_scan_mask when iio_disable_all_buffers is
called during an unexpected device removal.  This leak was introduced by
the fix
a87c82e454 iio: Stop sampling when the device is removed
and hence is a regression fix.
2013-10-17 09:40:52 -07:00
Guenter Roeck
94468783cd usb: usb_phy_gen: refine conditional declaration of usb_nop_xceiv_register
Commit 3fa4d734 (usb: phy: rename nop_usb_xceiv => usb_phy_gen_xceiv)
changed the conditional around the declaration of usb_nop_xceiv_register
from
	#if defined(CONFIG_NOP_USB_XCEIV) ||
		(defined(CONFIG_NOP_USB_XCEIV_MODULE) && defined(MODULE))
to
	#if IS_ENABLED(CONFIG_NOP_USB_XCEIV)

While that looks the same, it is semantically different. The first expression
is true if CONFIG_NOP_USB_XCEIV is built as module and if the including
code is built as module. The second expression is true if code depending on
CONFIG_NOP_USB_XCEIV if built as module or into the kernel.

As a result, the arm:allmodconfig build fails with

arch/arm/mach-omap2/built-in.o: In function `omap3_evm_init':
arch/arm/mach-omap2/board-omap3evm.c:703: undefined reference to
	`usb_nop_xceiv_register'

Fix the problem by reverting to the old conditional.

Cc: Josh Boyer <jwboyer@redhat.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-10-17 09:34:30 -07:00
Greg Kroah-Hartman
b762799dd8 Revert "Drivers: hv: vmbus: Fix a bug in channel rescind code"
This reverts commit 90d33f3ec5 as it's not
the correct fix for this issue, and it causes a build warning to be
added to the kernel tree.

Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-10-17 09:30:10 -07:00
Rafael J. Wysocki
2421ad48f4 ACPI / PM: Drop two functions that are not used any more
Two functions defined in device_pm.c, acpi_dev_pm_add_dependent()
and acpi_dev_pm_remove_dependent(), have no callers and may be
dropped, so drop them.

Moreover, they are the only functions adding entries to and removing
entries from the power_dependent list in struct acpi_device, so drop
that list too.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-10-17 15:44:48 +02:00
Aaron Lu
b08fc109ce ATA / ACPI: remove power dependent device handling
Previously, we wanted SCSI devices corrsponding to ATA devices to
be runtime resumed when the power resource for those ATA device was
turned on by some other device, so we added the SCSI device to the
dependent device list of the ATA device's ACPI node.  However, this
code has no effect after commit 41863fc (ACPI / power: Drop automaitc
resume of power resource dependent devices) and the mechanism it was
supposed to implement is regarded as a bad idea now, so drop it.

[rjw: Changelog]
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-10-17 15:38:53 +02:00
Linus Torvalds
056cdce0d3 Merge branch 'akpm' (fixes from Andrew Morton)
Merge misc fixes from Andrew Morton.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (21 commits)
  mm: revert mremap pud_free anti-fix
  mm: fix BUG in __split_huge_page_pmd
  swap: fix set_blocksize race during swapon/swapoff
  procfs: call default get_unmapped_area on MMU-present architectures
  procfs: fix unintended truncation of returned mapped address
  writeback: fix negative bdi max pause
  percpu_refcount: export symbols
  fs: buffer: move allocation failure loop into the allocator
  mm: memcg: handle non-error OOM situations more gracefully
  tools/testing/selftests: fix uninitialized variable
  block/partitions/efi.c: treat size mismatch as a warning, not an error
  mm: hugetlb: initialize PG_reserved for tail pages of gigantic compound pages
  mm/zswap: bugfix: memory leak when re-swapon
  mm: /proc/pid/pagemap: inspect _PAGE_SOFT_DIRTY only on present pages
  mm: migration: do not lose soft dirty bit if page is in migration state
  gcov: MAINTAINERS: Add an entry for gcov
  mm/hugetlb.c: correct missing private flag clearing
  mm/vmscan.c: don't forget to free shrinker->nr_deferred
  ipc/sem.c: synchronize semop and semctl with IPC_RMID
  ipc: update locking scheme comments
  ...
2013-10-16 21:36:03 -07:00
Hugh Dickins
57a8f0cdb8 mm: revert mremap pud_free anti-fix
Revert commit 1ecfd533f4 ("mm/mremap.c: call pud_free() after fail
calling pmd_alloc()").

The original code was correct: pud_alloc(), pmd_alloc(), pte_alloc_map()
ensure that the pud, pmd, pt is already allocated, and seldom do they
need to allocate; on failure, upper levels are freed if appropriate by
the subsequent do_munmap().  Whereas commit 1ecfd533f4 did an
unconditional pud_free() of a most-likely still-in-use pud: saved only
by the near-impossiblity of pmd_alloc() failing.

Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-10-16 21:35:53 -07:00
Hugh Dickins
750e8165f5 mm: fix BUG in __split_huge_page_pmd
Occasionally we hit the BUG_ON(pmd_trans_huge(*pmd)) at the end of
__split_huge_page_pmd(): seen when doing madvise(,,MADV_DONTNEED).

It's invalid: we don't always have down_write of mmap_sem there: a racing
do_huge_pmd_wp_page() might have copied-on-write to another huge page
before our split_huge_page() got the anon_vma lock.

Forget the BUG_ON, just go back and try again if this happens.

Signed-off-by: Hugh Dickins <hughd@google.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: David Rientjes <rientjes@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-10-16 21:35:53 -07:00
Krzysztof Kozlowski
5b808a2300 swap: fix set_blocksize race during swapon/swapoff
Fix race between swapoff and swapon.  Swapoff used old_block_size from
swap_info outside of swapon_mutex so it could be overwritten by
concurrent swapon.

The race has visible effect only if more than one swap block device
exists with different block sizes (e.g.  /dev/sda1 with block size 4096
and /dev/sdb1 with 512).  In such case it leads to setting the blocksize
of swapped off device with wrong blocksize.

The bug can be triggered with multiple concurrent swapoff and swapon:
0. Swap for some device is on.
1. swapoff:
First the swapoff is called on this device and "struct swap_info_struct
*p" is assigned. This is done under swap_lock however this lock is
released for the call try_to_unuse().

2. swapon:
After the assignment above (and before acquiring swapon_mutex &
swap_lock by swapoff) the swapon is called on the same device.
The p->old_block_size is assigned to the value of block_size the device.
This block size should be the same as previous but sometimes it is not.
The swapon ends successfully.

3. swapoff:
Swapoff resumes, grabs the locks and mutex and continues to disable this
swap device. Now it sets the block size to value taken from swap_info
which was overwritten by swapon in 2.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reported-by: Weijie Yang <weijie.yang.kh@gmail.com>
Cc: Bob Liu <bob.liu@oracle.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Shaohua Li <shli@fusionio.com>
Cc: Minchan Kim <minchan@kernel.org>
Acked-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-10-16 21:35:53 -07:00
HATAYAMA Daisuke
fad1a86e25 procfs: call default get_unmapped_area on MMU-present architectures
Commit c4fe244857 ("sparc: fix PCI device proc file mmap(2)") added
proc_reg_get_unmapped_area in proc_reg_file_ops and
proc_reg_file_ops_no_compat, by which now mmap always returns EIO if
get_unmapped_area method is not defined for the target procfs file,
which causes regression of mmap on /proc/vmcore.

To address this issue, like get_unmapped_area(), call default
current->mm->get_unmapped_area on MMU-present architectures if
pde->proc_fops->get_unmapped_area, i.e.  the one in actual file
operation in the procfs file, is not defined.

Reported-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Tested-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-10-16 21:35:53 -07:00