firefly-linux-kernel-4.4.55.git
11 years agostaging: xillybus: Remember device pointer for use with dev_* functions
Eli Billauer [Fri, 18 Oct 2013 22:02:25 +0000 (01:02 +0300)]
staging: xillybus: Remember device pointer for use with dev_* functions

This is necessary so that xillybus_core uses the correct device pointer
for PCIe devices in diagnostic message calls (dev_err, dev_warn and dev_info)

Signed-off-by: Eli Billauer <eli.billauer@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging/lustre/lnet: Remove unnecessary spaces in router_proc.c
Lisa Nguyen [Fri, 18 Oct 2013 18:52:41 +0000 (11:52 -0700)]
staging/lustre/lnet: Remove unnecessary spaces in router_proc.c

Remove unnecessary spaces between function names and open
parentheses in router_proc.c to meet kernel coding style.

Signed-off-by: Lisa Nguyen <lisa@xenapiadmin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging/lustre/lnet: Fix static initialization error in router_proc.c
Lisa Nguyen [Fri, 18 Oct 2013 18:52:34 +0000 (11:52 -0700)]
staging/lustre/lnet: Fix static initialization error in router_proc.c

Fixed the static initialization error generated by checkpatch.pl to
meet kernel coding standards.

Signed-off-by: Lisa Nguyen <lisa@xenapiadmin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging/lustre/lnet: Reformat pointer variable in lib-move.c
Lisa Nguyen [Fri, 18 Oct 2013 09:12:18 +0000 (02:12 -0700)]
staging/lustre/lnet: Reformat pointer variable in lib-move.c

Reformat a pointer variable in lib-move.c to meet kernel
coding standards.

Signed-off-by: Lisa Nguyen <lisa@xenapiadmin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging/lustre/lnet: Remove () from return statements in lib-move.c
Lisa Nguyen [Fri, 18 Oct 2013 09:12:11 +0000 (02:12 -0700)]
staging/lustre/lnet: Remove () from return statements in lib-move.c

Remove unnecessary parentheses from return statements to
eliminate errors generated by checkpatch.pl and meet kernel
coding standards.

Signed-off-by: Lisa Nguyen <lisa@xenapiadmin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging/lustre/lnet: Adjust lines to meet 80 column limit in lib-move.c
Lisa Nguyen [Fri, 18 Oct 2013 09:12:02 +0000 (02:12 -0700)]
staging/lustre/lnet: Adjust lines to meet 80 column limit in lib-move.c

Fixed lines to not exceed more than 80 columns per line to meet
kernel coding standards.

Signed-off-by: Lisa Nguyen <lisa@xenapiadmin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging/lustre/lnet: Move open braces to previous lines in lib-move.c
Lisa Nguyen [Fri, 18 Oct 2013 09:11:54 +0000 (02:11 -0700)]
staging/lustre/lnet: Move open braces to previous lines in lib-move.c

Move open braces to previous lines in lib-move.c to meet kernel
coding standards.

Signed-off-by: Lisa Nguyen <lisa@xenapiadmin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging/lustre/lnet: Remove unnecessary whitespace in lib-move.c
Lisa Nguyen [Fri, 18 Oct 2013 09:11:44 +0000 (02:11 -0700)]
staging/lustre/lnet: Remove unnecessary whitespace in lib-move.c

Remove unnecessary whitespace around open parentheses in lib-move.c
to meet kernel coding standards.

Signed-off-by: Lisa Nguyen <lisa@xenapiadmin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging/lustre/lnet/selftest: Remove unnecessary spaces in brw_test.c
Lisa Nguyen [Fri, 18 Oct 2013 06:03:48 +0000 (23:03 -0700)]
staging/lustre/lnet/selftest: Remove unnecessary spaces in brw_test.c

Remove spaces between function names and open parentheses to
eliminate warnings generated by checkpatch.pl and meet kernel
coding standards.

Signed-off-by: Lisa Nguyen <lisa@xenapiadmin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging/lustre/lnet/selftest: Fix trailing statements in brw_test.c
Lisa Nguyen [Fri, 18 Oct 2013 06:03:38 +0000 (23:03 -0700)]
staging/lustre/lnet/selftest: Fix trailing statements in brw_test.c

Fix trailing statement errors generated by checkpatch.pl in
brw_test.c to meet kernel coding standards.

Signed-off-by: Lisa Nguyen <lisa@xenapiadmin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoMerge 3.12-rc6 into staging-next.
Greg Kroah-Hartman [Sat, 19 Oct 2013 20:14:34 +0000 (13:14 -0700)]
Merge 3.12-rc6 into staging-next.

We want these fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoLinux 3.12-rc6
Linus Torvalds [Sat, 19 Oct 2013 19:28:15 +0000 (12:28 -0700)]
Linux 3.12-rc6

11 years agostaging: rtl8192u: fix sparse warning, make a function static
Teodora Baluta [Fri, 18 Oct 2013 18:37:47 +0000 (21:37 +0300)]
staging: rtl8192u: fix sparse warning, make a function static

Fix the following sparse warning:
drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c:240:22: warning: symbol 'ieee80211_alloc_txb' was not declared. Should it be static?

Signed-off-by: Teodora Baluta <teobaluta@gmail.com>
Reviewed-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoStaging: speakup: removing jiffies comparison in speakup_apollo.c
Ashvini Varatharaj [Sat, 19 Oct 2013 03:30:59 +0000 (09:00 +0530)]
Staging: speakup: removing jiffies comparison in speakup_apollo.c

Fix checkpatch warning: WARNING: Comparing jiffies is almost always
wrong; prefer time_after, time_before and friends

Signed-off-by: Ashvini Varatharaj <ashvinivaratharaj@gmail.com>
Reviewed-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoStaging: speakup: removing jiffies comparison using time_after_eq()
Ashvini Varatharaj [Sat, 19 Oct 2013 03:21:20 +0000 (08:51 +0530)]
Staging: speakup: removing jiffies comparison using time_after_eq()

Fix checkpatch warning:  Comparing jiffies is almost always wrong;
prefer time_after, time_before and friends

Signed-off-by: Ashvini Varatharaj <ashvinivaratharaj@gmail.com>
Reviewed-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoMerge tag 'iio-for-3.12d' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23...
Greg Kroah-Hartman [Sat, 19 Oct 2013 12:16:34 +0000 (05:16 -0700)]
Merge tag 'iio-for-3.12d' of git://git./linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Fourth round of IIO new drivers, functionality and cleanups for the 3.13 cycle.

New Drivers
* cm36651 combined RGB light and proximity sensor.

Core improvements

* Some more fixes and cleanups related to buffers.  These include the second
  half of a series which went is as fixes.  The basis for delaying until the
  next merge window is that some are too invasive for this late in a cycle
  and others only effect code paths current unused in the mainline tree.
  In this case we have:
   * protecting against concurrent userspace access
   * fixing a memory leak if a device goes away
   * avoiding always reallocating the buffer whether or not it has changed
     (a bug fix, but one with no functional changes other than a small speed
     improvement.)
   * Add reference counting for buffers to ensure they hang around if open
     from userspace or in kernel when the device is forcefully removed.
   * Return -ENODEV for buffer access operations when the device has gone
     away.
   * Add proper locking for iio_update_buffers (currently we only have one
     buffer per device in mainline, but an input bridge driver is under
     development which would make this bug 'real'.)
   * Wake up anyone waiting on a buffer if the device is unregistered.  A
     subsequent read will fail, notifying userspace that the device is no
     longer there rather than having it wait possibly for ever.

* Move the iio_sw_preenable functionality into the core.  This avoids drivers
  having to 'know' about how the buffers are implemented and is called by
  almost all drivers anyway.  Those that don't call it are not harmed by it
  being called.
* New registration approach for information (i.e. sysfs attributes) about
  events.  Much more generic and now similar to how the equivalent is
  handled for channel information.  The events infrastructure had been left
  behind by other changes so this brings it back in line.
* Using the new events registration approach, add a hysterisis event_info
  element and apply this to those drivers with this property.
* A little unitialized variable bug in the generic_buffer.c example.
* Factor out the code for freeing lists of IIO Device attributes to avoid
  some repitition.

Driver cleanups
* At91 driver gains touch screen support and some related fixes.
* Follow up series of patches removing the now redundant
  iio_sw_buffer_preenable calls.
* Lots of conversions to the new event registration methods.
* Another round of hmc5843 cleanups as that driver moves towards graduating
  from staging.
* Make some SoC drivers buildable if COMPILE_TEST is used.  Follow up fixes
  for a few bits and bobs that revealed.
* Add explicit includes of linux/of.h to those drivers making us of linux/of.h

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...
Linus Torvalds [Fri, 18 Oct 2013 23:46:21 +0000 (16:46 -0700)]
Merge branch 'for-linus' of git://git./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

11 years agoMerge tag 'pm+acpi-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Fri, 18 Oct 2013 21:26:51 +0000 (14:26 -0700)]
Merge tag 'pm+acpi-3.12-rc6' of git://git./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

11 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 18 Oct 2013 19:25:11 +0000 (12:25 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./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

11 years agoiio: light: gp2ap020a00f: Include linux/of.h header
Sachin Kamat [Fri, 18 Oct 2013 12:04:00 +0000 (13:04 +0100)]
iio: light: gp2ap020a00f: Include linux/of.h header

'of_match_ptr' is defined in linux/of.h. Include it explicitly to
avoid build breakage in the future.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agoiio: adc: ti-adc081c: Include linux/of.h header
Sachin Kamat [Fri, 18 Oct 2013 12:04:00 +0000 (13:04 +0100)]
iio: adc: ti-adc081c: Include linux/of.h header

'of_match_ptr' is defined in linux/of.h. Include it explicitly to
avoid build breakage in the future.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agoiio: adc: nau7802: Include linux/of.h header
Sachin Kamat [Fri, 18 Oct 2013 12:04:00 +0000 (13:04 +0100)]
iio: adc: nau7802: Include linux/of.h header

'of_match_ptr' is defined in linux/of.h. Include it explicitly to
avoid build breakage in the future.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agoiio: adc: mcp3422: Include linux/of.h header
Sachin Kamat [Fri, 18 Oct 2013 12:04:00 +0000 (13:04 +0100)]
iio: adc: mcp3422: Include linux/of.h header

'of_match_ptr' is defined in linux/of.h. Include it explicitly to
avoid build breakage in the future.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agoBtrfs: release path before starting transaction in can_nocow_extent
Josef Bacik [Fri, 18 Oct 2013 16:10:36 +0000 (12:10 -0400)]
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>
11 years agoMerge branch 'acpi-fixes'
Rafael J. Wysocki [Fri, 18 Oct 2013 11:42:10 +0000 (13:42 +0200)]
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

11 years agoMerge branch 'pm-fixes'
Rafael J. Wysocki [Fri, 18 Oct 2013 11:41:56 +0000 (13:41 +0200)]
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

11 years agoMerge branch 'for-linus' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Fri, 18 Oct 2013 01:49:21 +0000 (18:49 -0700)]
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

11 years agoiio: at91: introduce touch screen support in iio adc driver
Josh Wu [Tue, 8 Oct 2013 03:48:00 +0000 (04:48 +0100)]
iio: at91: introduce touch screen support in iio adc driver

AT91 ADC hardware integrate touch screen support. So this patch add touch
screen support for at91 adc iio driver.
To enable touch screen support in adc, you need to add the dt parameters:
  1. which type of touch are used? (4 or 5 wires), sample period time.
  2. correct pressure detect threshold value.

In the meantime, since touch screen will use a interal period trigger of adc,
so it is conflict to other hardware triggers. Driver will disable the hardware
trigger support if touch screen is enabled.

This driver has been tested in AT91SAM9X5-EK and SAMA5D3x-EK.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
CC: devicetree@vger.kernel.org
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging:iio:hmc5843: Trivial cleanup
Peter Meerwald [Wed, 16 Oct 2013 22:19:00 +0000 (23:19 +0100)]
staging:iio:hmc5843: Trivial cleanup

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging:iio:hmc5843: Check initialization and chip identifier
Peter Meerwald [Wed, 16 Oct 2013 22:19:00 +0000 (23:19 +0100)]
staging:iio:hmc5843: Check initialization and chip identifier

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging:iio:hmc5843: Introduce _set_range_gain()
Peter Meerwald [Wed, 16 Oct 2013 22:19:00 +0000 (23:19 +0100)]
staging:iio:hmc5843: Introduce _set_range_gain()

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging:iio:hmc5843: Rename _set_rate() to _set_samp_freq()
Peter Meerwald [Wed, 16 Oct 2013 22:19:00 +0000 (23:19 +0100)]
staging:iio:hmc5843: Rename _set_rate() to _set_samp_freq()

move locking inside _set() function

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging:iio:hmc5843: Reorganize _set_meas_conf()
Peter Meerwald [Wed, 16 Oct 2013 22:19:00 +0000 (23:19 +0100)]
staging:iio:hmc5843: Reorganize _set_meas_conf()

move locking inside _set() function

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging:iio:hmc5843: Rename _configure() to _set_mode()
Peter Meerwald [Wed, 16 Oct 2013 22:19:00 +0000 (23:19 +0100)]
staging:iio:hmc5843: Rename _configure() to _set_mode()

and be consistent with other setter functions in that first argument
is hmc5843_data

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging:iio:hmc5843: Remove ability to change operating mode
Peter Meerwald [Wed, 16 Oct 2013 22:19:00 +0000 (23:19 +0100)]
staging:iio:hmc5843: Remove ability to change operating mode

only continuous mode is supported for now; the driver could/should
be switched to single conversion mode

operating mode should be determined by the way IIO accesses the device
and not exposed explicitly

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging:iio:hmc5843: Add trigger handling
Peter Meerwald [Wed, 16 Oct 2013 22:19:00 +0000 (23:19 +0100)]
staging:iio:hmc5843: Add trigger handling

v3:
* use __be16 instead of s16
v2 (thanks to Jonathan Cameron):
* drop dynamic buffer allocation, buffer is in hmc5842_data
* grab timestamp near data acquisition
* restrict available scan masks (only read all axis)

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging:iio:hmc5843: Always read all channels values otherwise no updates
Peter Meerwald [Wed, 16 Oct 2013 22:19:00 +0000 (23:19 +0100)]
staging:iio:hmc5843: Always read all channels values otherwise no updates

v2:
* use __be16 instead of s16

Split out data ready/wait for read measurement
fix bug in case reading status register fails

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging:iio:hmc5843: Rename _check_samp_freq to get_samp_freq_index
Peter Meerwald [Wed, 16 Oct 2013 22:19:00 +0000 (23:19 +0100)]
staging:iio:hmc5843: Rename _check_samp_freq to get_samp_freq_index

and drop/inline helper functions _check_int_plus_micros() and
_show_int_plus_micros()

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging:iio:hmc5843: Use SCALE instead of magn_range
Peter Meerwald [Wed, 16 Oct 2013 22:19:00 +0000 (23:19 +0100)]
staging:iio:hmc5843: Use SCALE instead of magn_range

v3:
* rename _check_scale() to _get_scale_index()
v2:
* use SCALE instead of CALIBSCALE to control the range/gain
  of measurements

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agoDT: Add documentation for cm36651 proximity/light sensor
Beomho Seo [Thu, 17 Oct 2013 02:22:00 +0000 (03:22 +0100)]
DT: Add documentation for cm36651 proximity/light sensor

This patch adds device tree binding documentation for CM36651 proximity/light sensor.

Signed-off-by: Beomho Seo <beomho.seo@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agoiio: cm36651: Add CM36651 proximity/light sensor
Beomho Seo [Thu, 17 Oct 2013 02:22:00 +0000 (03:22 +0100)]
iio: cm36651: Add CM36651 proximity/light sensor

This patch adds a new driver for Capella CM36651 proximity and RGB sensor.

Signed-off-by: Beomho Seo <beomho.seo@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging:iio:spear_adc: Fix IRQ check
Lars-Peter Clausen [Wed, 16 Oct 2013 20:45:00 +0000 (21:45 +0100)]
staging:iio:spear_adc: Fix IRQ check

The test in the spear_adc driver which checks whether the IRQ number returned
by platform_get_irq() has multiple problems. It accepts 0 even though this is
an invalid IRQ. It also rejects IRQ numbers that are larger or equal than
NR_IRQS. First of all drivers should never need to reference NR_IRQS and
secondly with CONFIG_SPARSE_IRQ NR_IRQS is not the upper limit, so the check
might reject valid IRQ numbers. This patch modifies the check to only test
against less or equal to 0.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Cc: Stefan Roese <sr@denx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging:iio:lpc32xx_adc: Fix IRQ check
Lars-Peter Clausen [Wed, 16 Oct 2013 20:45:00 +0000 (21:45 +0100)]
staging:iio:lpc32xx_adc: Fix IRQ check

The test in the lpc32xx_adc driver which checks whether the IRQ number returned
by platform_get_irq() has multiple problems. It accepts 0 even though this is an
invalid IRQ. It also rejects IRQ numbers that are larger or equal than NR_IRQS.
First of all drivers should never need to reference NR_IRQS and secondly with
CONFIG_SPARSE_IRQ NR_IRQS is not the upper limit, so the check might reject
valid IRQ numbers. This patch modifies the check to only test against less or
equal to 0.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Cc: Roland Stigge <stigge@antcom.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
11 years agostaging: vt6656: removed line over 80 chars warning
Nandini Hanumanthagowda [Thu, 17 Oct 2013 18:52:27 +0000 (00:22 +0530)]
staging: vt6656: removed line over 80 chars warning

Removed the checkpatch warning of line over 80 chars
by breaking the long line into sensible chunks of 2 lines
to comply with coding style

Signed-off-by: Nandini Hanumanthagowda <nandu.hgowda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging: vt6656: removed C99-style comments
Nandini Hanumanthagowda [Thu, 17 Oct 2013 18:52:26 +0000 (00:22 +0530)]
staging: vt6656: removed C99-style comments

Linux style for comment is C89 style "/* */" and it
doesn't prefer C99-style comment "//...". Hence replaced
C99-style comments used in code by C89 style comment to
comply with linux coding style

Signed-off-by: Nandini Hanumanthagowda <nandu.hgowda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging: vt6656: removed unnecessary parentheses in return statement
Nandini Hanumanthagowda [Thu, 17 Oct 2013 18:52:25 +0000 (00:22 +0530)]
staging: vt6656: removed unnecessary parentheses in return statement

There was parentheses around return statement's value which
was not required since return statement is not a function.
Hence removed the parentheses to eliminate the checkpatch error
which states:
ERROR: return is not a function, parentheses are not required

Signed-off-by: Nandini Hanumanthagowda <nandu.hgowda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging: vt6656: removal of braces under if-control statement
Nandini Hanumanthagowda [Thu, 17 Oct 2013 18:52:24 +0000 (00:22 +0530)]
staging: vt6656: removal of braces under if-control statement

Removed braces under if-else control flow statement whenever
there is only one statement under if-else control statement
to comply with linux coding style

Signed-off-by: Nandini Hanumanthagowda <nandu.hgowda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging: vt6656: indentation and removal of unnecessary spaces
Nandini Hanumanthagowda [Thu, 17 Oct 2013 18:52:23 +0000 (00:22 +0530)]
staging: vt6656: indentation and removal of unnecessary spaces

Removed unnecessary white spaces at beginning of line
and added proper indentation to fix checkpatch warnings/errors
to improve the readability of code

Signed-off-by: Nandini Hanumanthagowda <nandu.hgowda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging: vt6655:removed incorrect casting in hostap.c
Archana kumari [Thu, 17 Oct 2013 19:31:55 +0000 (01:01 +0530)]
staging: vt6655:removed incorrect casting in hostap.c

This patch fixes the following type of sparse warnings:

drivers/staging/vt6655/hostap.c:733:42: warning: cast from restricted gfp_t
drivers/staging/vt6655/hostap.c:733:42: warning: incorrect type in argument 2 (different base types)
drivers/staging/vt6655/hostap.c:733:42:    expected restricted gfp_t [usertype] flags
drivers/staging/vt6655/hostap.c:733:42:    got int [signed] <noident>

Signed-off-by: Archana kumari <archanakumari959@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoMerge tag 'driver-core-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 17 Oct 2013 17:39:01 +0000 (10:39 -0700)]
Merge tag 'driver-core-3.12-rc6' of git://git./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

11 years agoMerge tag 'usb-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Thu, 17 Oct 2013 17:38:18 +0000 (10:38 -0700)]
Merge tag 'usb-3.12-rc6' of git://git./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.

11 years agoMerge tag 'tty-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Linus Torvalds [Thu, 17 Oct 2013 17:37:42 +0000 (10:37 -0700)]
Merge tag 'tty-3.12-rc6' of git://git./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"

11 years agoMerge tag 'char-misc-3.12-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregk...
Linus Torvalds [Thu, 17 Oct 2013 17:36:57 +0000 (10:36 -0700)]
Merge tag 'char-misc-3.12-rc6' of git://git./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

11 years agoMerge tag 'sound-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Linus Torvalds [Thu, 17 Oct 2013 17:17:25 +0000 (10:17 -0700)]
Merge tag 'sound-3.12' of git://git./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

11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
Linus Torvalds [Thu, 17 Oct 2013 17:16:45 +0000 (10:16 -0700)]
Merge branch 'for-linus' of git://git./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

11 years agoMerge tag 'iio-fixes-for-3.12c' of git://git.kernel.org/pub/scm/linux/kernel/git...
Greg Kroah-Hartman [Thu, 17 Oct 2013 16:40:52 +0000 (09:40 -0700)]
Merge tag 'iio-fixes-for-3.12c' of git://git./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
a87c82e454f184a9473f8cdfd4d304205f585f65 iio: Stop sampling when the device is removed
and hence is a regression fix.

11 years agousb: usb_phy_gen: refine conditional declaration of usb_nop_xceiv_register
Guenter Roeck [Thu, 17 Oct 2013 02:18:41 +0000 (19:18 -0700)]
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>
11 years agoRevert "Drivers: hv: vmbus: Fix a bug in channel rescind code"
Greg Kroah-Hartman [Thu, 17 Oct 2013 16:30:10 +0000 (09:30 -0700)]
Revert "Drivers: hv: vmbus: Fix a bug in channel rescind code"

This reverts commit 90d33f3ec519db19d785216299a4ee85ef58ec97 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>
11 years agoStaging: sb105x: Removing trailing whitespaces
Ashvini Varatharaj [Thu, 17 Oct 2013 16:06:43 +0000 (21:36 +0530)]
Staging: sb105x: Removing trailing whitespaces

Fix checkpatch error : ERROR: trailing whitespace

Signed-off-by: Ashvini Varatharaj <ashvinivaratharaj@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoStaging: wlan-ng: changing "* dev" to "*dev"
Ashvini Varatharaj [Thu, 17 Oct 2013 14:22:47 +0000 (19:52 +0530)]
Staging: wlan-ng: changing "* dev" to "*dev"

Fix checkpatch error: ERROR: "foo * bar" should be "foo *bar"

Signed-off-by: Ashvini Varatharaj <ashvinivaratharaj@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging: dgnc: braces {} are not necessary for single statement in dgnc_cls.c
Archana kumari [Thu, 17 Oct 2013 13:15:16 +0000 (18:45 +0530)]
staging: dgnc: braces {} are not necessary for single statement in dgnc_cls.c

Fix checkpatch.pl issues with braces {} are not necessary
for single statement blocks in dgnc_cls.c

Signed-off-by: Archana kumari <archanakumari959@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agostaging: vt6655: Fix Sparse Warning for Static Declarations
Archana kumari [Thu, 17 Oct 2013 10:24:44 +0000 (15:54 +0530)]
staging: vt6655: Fix Sparse Warning for Static Declarations

This patch fixes the Sparse Warning "symbol was not declared. Should it be
static?" in aes_ccmp.c

Signed-off-by: Archana kumari <archanakumari959@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoStaging: lustre: Removal of Space between function name and parenthesis in timer.c
Rashika Kheria [Thu, 17 Oct 2013 14:30:09 +0000 (20:00 +0530)]
Staging: lustre: Removal of Space between function name and parenthesis in timer.c

The patch fixes the following checkpatch.pl warning in timer.c-
WARNING: space prohibited between function name and open parenthesis '(

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoStaging: lustre: Removal of assignment in if condition in conrpc.c
Rashika Kheria [Thu, 17 Oct 2013 14:28:45 +0000 (19:58 +0530)]
Staging: lustre: Removal of assignment in if condition in conrpc.c

This patch fixes the following checkpatch.pl error in conrpc.c-
ERROR: do not use assignment in if condition

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoStaging: lustre: Fix quoted string split across lines in conrpc.c
Rashika Kheria [Thu, 17 Oct 2013 14:28:12 +0000 (19:58 +0530)]
Staging: lustre: Fix quoted string split across lines in conrpc.c

This patch fixes the following checkpatch.pl warning in conrpc.c-
WARNING: quoted string split across lines conrpc.c

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoStaging: lustre: Fix Space Prohibition before '++' in conrpc.c
Rashika Kheria [Thu, 17 Oct 2013 14:27:26 +0000 (19:57 +0530)]
Staging: lustre: Fix Space Prohibition before '++' in conrpc.c

This patch fixes the following checkpatch.pl error in conrpc.c-
ERROR: space prohibited before that '++'

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoStaging: lustre: Fix Space Requirement around ':' in conrpc.c
Rashika Kheria [Thu, 17 Oct 2013 14:26:52 +0000 (19:56 +0530)]
Staging: lustre: Fix Space Requirement around ':' in conrpc.c

The patch fixes the following checkpatch.pl error in conrpc.c-
ERROR: spaces required around that ':'

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoStaging: lustre: Removal of Space between function name and parenthesis in conrpc.c
Rashika Kheria [Thu, 17 Oct 2013 14:25:58 +0000 (19:55 +0530)]
Staging: lustre: Removal of Space between function name and parenthesis in conrpc.c

The patch fixes the following checkpatch.pl warning in conrpc.c-
WARNING: space prohibited between function name and open parenthesis '('

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoACPI / PM: Drop two functions that are not used any more
Rafael J. Wysocki [Thu, 17 Oct 2013 13:44:48 +0000 (15:44 +0200)]
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>
11 years agoATA / ACPI: remove power dependent device handling
Aaron Lu [Thu, 17 Oct 2013 13:38:53 +0000 (15:38 +0200)]
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>
11 years agoMerge branch 'akpm' (fixes from Andrew Morton)
Linus Torvalds [Thu, 17 Oct 2013 04:36:03 +0000 (21:36 -0700)]
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
  ...

11 years agomm: revert mremap pud_free anti-fix
Hugh Dickins [Wed, 16 Oct 2013 20:47:09 +0000 (13:47 -0700)]
mm: revert mremap pud_free anti-fix

Revert commit 1ecfd533f4c5 ("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 1ecfd533f4c5 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>
11 years agomm: fix BUG in __split_huge_page_pmd
Hugh Dickins [Wed, 16 Oct 2013 20:47:08 +0000 (13:47 -0700)]
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>
11 years agoswap: fix set_blocksize race during swapon/swapoff
Krzysztof Kozlowski [Wed, 16 Oct 2013 20:47:06 +0000 (13:47 -0700)]
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>
11 years agoprocfs: call default get_unmapped_area on MMU-present architectures
HATAYAMA Daisuke [Wed, 16 Oct 2013 20:47:05 +0000 (13:47 -0700)]
procfs: call default get_unmapped_area on MMU-present architectures

Commit c4fe24485729 ("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>
11 years agoprocfs: fix unintended truncation of returned mapped address
HATAYAMA Daisuke [Wed, 16 Oct 2013 20:47:04 +0000 (13:47 -0700)]
procfs: fix unintended truncation of returned mapped address

Currently, proc_reg_get_unmapped_area truncates upper 32-bit of the
mapped virtual address returned from get_unmapped_area method in
pde->proc_fops due to the variable rv of signed integer on x86_64.  This
is too small to have vitual address of unsigned long on x86_64 since on
x86_64, signed integer is of 4 bytes while unsigned long is of 8 bytes.
To fix this issue, use unsigned long instead.

Fixes a regression added in commit c4fe24485729 ("sparc: fix PCI device
proc file mmap(2)").

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>
11 years agowriteback: fix negative bdi max pause
Fengguang Wu [Wed, 16 Oct 2013 20:47:03 +0000 (13:47 -0700)]
writeback: fix negative bdi max pause

Toralf runs trinity on UML/i386.  After some time it hangs and the last
message line is

BUG: soft lockup - CPU#0 stuck for 22s! [trinity-child0:1521]

It's found that pages_dirtied becomes very large.  More than 1000000000
pages in this case:

period = HZ * pages_dirtied / task_ratelimit;
BUG_ON(pages_dirtied > 2000000000);
BUG_ON(pages_dirtied > 1000000000);      <---------

UML debug printf shows that we got negative pause here:

ick: pause : -984
ick: pages_dirtied : 0
ick: task_ratelimit: 0

 pause:
+       if (pause < 0)  {
+               extern int printf(char *, ...);
+               printf("ick : pause : %li\n", pause);
+               printf("ick: pages_dirtied : %lu\n", pages_dirtied);
+               printf("ick: task_ratelimit: %lu\n", task_ratelimit);
+               BUG_ON(1);
+       }
        trace_balance_dirty_pages(bdi,

Since pause is bounded by [min_pause, max_pause] where min_pause is also
bounded by max_pause.  It's suspected and demonstrated that the
max_pause calculation goes wrong:

ick: pause : -717
ick: min_pause : -177
ick: max_pause : -717
ick: pages_dirtied : 14
ick: task_ratelimit: 0

The problem lies in the two "long = unsigned long" assignments in
bdi_max_pause() which might go negative if the highest bit is 1, and the
min_t(long, ...) check failed to protect it falling under 0.  Fix all of
them by using "unsigned long" throughout the function.

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Reported-by: Toralf Förster <toralf.foerster@gmx.de>
Tested-by: Toralf Förster <toralf.foerster@gmx.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Richard Weinberger <richard@nod.at>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agopercpu_refcount: export symbols
Matias Bjorling [Wed, 16 Oct 2013 20:47:01 +0000 (13:47 -0700)]
percpu_refcount: export symbols

Export the interface to be used within modules.

Signed-off-by: Matias Bjorling <m@bjorling.me>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agofs: buffer: move allocation failure loop into the allocator
Johannes Weiner [Wed, 16 Oct 2013 20:47:00 +0000 (13:47 -0700)]
fs: buffer: move allocation failure loop into the allocator

Buffer allocation has a very crude indefinite loop around waking the
flusher threads and performing global NOFS direct reclaim because it can
not handle allocation failures.

The most immediate problem with this is that the allocation may fail due
to a memory cgroup limit, where flushers + direct reclaim might not make
any progress towards resolving the situation at all.  Because unlike the
global case, a memory cgroup may not have any cache at all, only
anonymous pages but no swap.  This situation will lead to a reclaim
livelock with insane IO from waking the flushers and thrashing unrelated
filesystem cache in a tight loop.

Use __GFP_NOFAIL allocations for buffers for now.  This makes sure that
any looping happens in the page allocator, which knows how to
orchestrate kswapd, direct reclaim, and the flushers sensibly.  It also
allows memory cgroups to detect allocations that can't handle failure
and will allow them to ultimately bypass the limit if reclaim can not
make progress.

Reported-by: azurIt <azurit@pobox.sk>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: memcg: handle non-error OOM situations more gracefully
Johannes Weiner [Wed, 16 Oct 2013 20:46:59 +0000 (13:46 -0700)]
mm: memcg: handle non-error OOM situations more gracefully

Commit 3812c8c8f395 ("mm: memcg: do not trap chargers with full
callstack on OOM") assumed that only a few places that can trigger a
memcg OOM situation do not return VM_FAULT_OOM, like optional page cache
readahead.  But there are many more and it's impractical to annotate
them all.

First of all, we don't want to invoke the OOM killer when the failed
allocation is gracefully handled, so defer the actual kill to the end of
the fault handling as well.  This simplifies the code quite a bit for
added bonus.

Second, since a failed allocation might not be the abrupt end of the
fault, the memcg OOM handler needs to be re-entrant until the fault
finishes for subsequent allocation attempts.  If an allocation is
attempted after the task already OOMed, allow it to bypass the limit so
that it can quickly finish the fault and invoke the OOM killer.

Reported-by: azurIt <azurit@pobox.sk>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agotools/testing/selftests: fix uninitialized variable
Felipe Pena [Wed, 16 Oct 2013 20:46:58 +0000 (13:46 -0700)]
tools/testing/selftests: fix uninitialized variable

The err variable is intended to receive the timer_create() return before
checking it

Signed-off-by: Felipe Pena <felipensp@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoblock/partitions/efi.c: treat size mismatch as a warning, not an error
Doug Anderson [Wed, 16 Oct 2013 20:46:57 +0000 (13:46 -0700)]
block/partitions/efi.c: treat size mismatch as a warning, not an error

In commit 27a7c642174e ("partitions/efi: account for pmbr size in lba")
we started treating bad sizes in lba field of the partition that has the
0xEE (GPT protective) as errors.

However, we may run into these "bad sizes" in the real world if someone
uses dd to copy an image from a smaller disk to a bigger disk.  Since
this case used to work (even without using force_gpt), keep it working
and treat the size mismatch as a warning instead of an error.

Reported-by: Josh Triplett <josh@joshtriplett.org>
Reported-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Doug Anderson <dianders@chromium.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Acked-by: Davidlohr Bueso <davidlohr@hp.com>
Tested-by: Artem Bityutskiy <dedekind1@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: hugetlb: initialize PG_reserved for tail pages of gigantic compound pages
Andrea Arcangeli [Wed, 16 Oct 2013 20:46:56 +0000 (13:46 -0700)]
mm: hugetlb: initialize PG_reserved for tail pages of gigantic compound pages

Commit 11feeb498086 ("kvm: optimize away THP checks in
kvm_is_mmio_pfn()") introduced a memory leak when KVM is run on gigantic
compound pages.

That commit depends on the assumption that PG_reserved is identical for
all head and tail pages of a compound page.  So that if get_user_pages
returns a tail page, we don't need to check the head page in order to
know if we deal with a reserved page that requires different
refcounting.

The assumption that PG_reserved is the same for head and tail pages is
certainly correct for THP and regular hugepages, but gigantic hugepages
allocated through bootmem don't clear the PG_reserved on the tail pages
(the clearing of PG_reserved is done later only if the gigantic hugepage
is freed).

This patch corrects the gigantic compound page initialization so that we
can retain the optimization in 11feeb498086.  The cacheline was already
modified in order to set PG_tail so this won't affect the boot time of
large memory systems.

[akpm@linux-foundation.org: tweak comment layout and grammar]
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reported-by: andy123 <ajs124.ajs124@gmail.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Acked-by: Rafael Aquini <aquini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm/zswap: bugfix: memory leak when re-swapon
Weijie Yang [Wed, 16 Oct 2013 20:46:54 +0000 (13:46 -0700)]
mm/zswap: bugfix: memory leak when re-swapon

zswap_tree is not freed when swapoff, and it got re-kmalloced in swapon,
so a memory leak occurs.

Free the memory of zswap_tree in zswap_frontswap_invalidate_area().

Signed-off-by: Weijie Yang <weijie.yang@samsung.com>
Reviewed-by: Bob Liu <bob.liu@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Cc: <stable@vger.kernel.org>
From: Weijie Yang <weijie.yang@samsung.com>
Subject: mm/zswap: bugfix: memory leak when invalidate and reclaim occur concurrently

Consider the following scenario:
thread 0: reclaim entry x (get refcount, but not call zswap_get_swap_cache_page)
thread 1: call zswap_frontswap_invalidate_page to invalidate entry x.
finished, entry x and its zbud is not freed as its refcount != 0
now, the swap_map[x] = 0
thread 0: now call zswap_get_swap_cache_page
swapcache_prepare return -ENOENT because entry x is not used any more
zswap_get_swap_cache_page return ZSWAP_SWAPCACHE_NOMEM
zswap_writeback_entry do nothing except put refcount
Now, the memory of zswap_entry x and its zpage leak.

Modify:
 - check the refcount in fail path, free memory if it is not referenced.

 - use ZSWAP_SWAPCACHE_FAIL instead of ZSWAP_SWAPCACHE_NOMEM as the fail path
   can be not only caused by nomem but also by invalidate.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Weijie Yang <weijie.yang@samsung.com>
Reviewed-by: Bob Liu <bob.liu@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: <stable@vger.kernel.org>
Acked-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: /proc/pid/pagemap: inspect _PAGE_SOFT_DIRTY only on present pages
Cyrill Gorcunov [Wed, 16 Oct 2013 20:46:53 +0000 (13:46 -0700)]
mm: /proc/pid/pagemap: inspect _PAGE_SOFT_DIRTY only on present pages

If a page we are inspecting is in swap we may occasionally report it as
having soft dirty bit (even if it is clean).  The pte_soft_dirty helper
should be called on present pte only.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm: migration: do not lose soft dirty bit if page is in migration state
Cyrill Gorcunov [Wed, 16 Oct 2013 20:46:51 +0000 (13:46 -0700)]
mm: migration: do not lose soft dirty bit if page is in migration state

If page migration is turned on in config and the page is migrating, we
may lose the soft dirty bit.  If fork and mprotect are called on
migrating pages (once migration is complete) pages do not obtain the
soft dirty bit in the correspond pte entries.  Fix it adding an
appropriate test on swap entries.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agogcov: MAINTAINERS: Add an entry for gcov
Peter Oberparleiter [Wed, 16 Oct 2013 20:46:49 +0000 (13:46 -0700)]
gcov: MAINTAINERS: Add an entry for gcov

Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm/hugetlb.c: correct missing private flag clearing
Joonsoo Kim [Wed, 16 Oct 2013 20:46:48 +0000 (13:46 -0700)]
mm/hugetlb.c: correct missing private flag clearing

We should clear the page's private flag when returing the page to the
hugepage pool.  Otherwise, marked hugepage can be allocated to the user
who tries to allocate the non-reserved hugepage.  If this user fail to
map this hugepage, he would try to return the page to the hugepage pool.
Since this page has a private flag, resv_huge_pages would mistakenly
increase.  This patch fixes this situation.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm/vmscan.c: don't forget to free shrinker->nr_deferred
Andrew Vagin [Wed, 16 Oct 2013 20:46:46 +0000 (13:46 -0700)]
mm/vmscan.c: don't forget to free shrinker->nr_deferred

This leak was added by commit 1d3d4437eae1 ("vmscan: per-node deferred
work").

unreferenced object 0xffff88006ada3bd0 (size 8):
  comm "criu", pid 14781, jiffies 4295238251 (age 105.641s)
  hex dump (first 8 bytes):
    00 00 00 00 00 00 00 00                          ........
  backtrace:
    [<ffffffff8170caee>] kmemleak_alloc+0x5e/0xc0
    [<ffffffff811c0527>] __kmalloc+0x247/0x310
    [<ffffffff8117848c>] register_shrinker+0x3c/0xa0
    [<ffffffff811e115b>] sget+0x5ab/0x670
    [<ffffffff812532f4>] proc_mount+0x54/0x170
    [<ffffffff811e1893>] mount_fs+0x43/0x1b0
    [<ffffffff81202dd2>] vfs_kern_mount+0x72/0x110
    [<ffffffff81202e89>] kern_mount_data+0x19/0x30
    [<ffffffff812530a0>] pid_ns_prepare_proc+0x20/0x40
    [<ffffffff81083c56>] alloc_pid+0x466/0x4a0
    [<ffffffff8105aeda>] copy_process+0xc6a/0x1860
    [<ffffffff8105beab>] do_fork+0x8b/0x370
    [<ffffffff8105c1a6>] SyS_clone+0x16/0x20
    [<ffffffff8171f739>] stub_clone+0x69/0x90
    [<ffffffffffffffff>] 0xffffffffffffffff

Signed-off-by: Andrew Vagin <avagin@openvz.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Glauber Costa <glommer@openvz.org>
Cc: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoipc/sem.c: synchronize semop and semctl with IPC_RMID
Manfred Spraul [Wed, 16 Oct 2013 20:46:45 +0000 (13:46 -0700)]
ipc/sem.c: synchronize semop and semctl with IPC_RMID

After acquiring the semlock spinlock, operations must test that the
array is still valid.

 - semctl() and exit_sem() would walk stale linked lists (ugly, but
   should be ok: all lists are empty)

 - semtimedop() would sleep forever - and if woken up due to a signal -
   access memory after free.

The patch also:
 - standardizes the tests for .deleted, so that all tests in one
   function leave the function with the same approach.
 - unconditionally tests for .deleted immediately after every call to
   sem_lock - even it it means that for semctl(GETALL), .deleted will be
   tested twice.

Both changes make the review simpler: After every sem_lock, there must
be a test of .deleted, followed by a goto to the cleanup code (if the
function uses "goto cleanup").

The only exception is semctl_down(): If sem_ids().rwsem is locked, then
the presence in ids->ipcs_idr is equivalent to !.deleted, thus no
additional test is required.

Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Cc: Mike Galbraith <efault@gmx.de>
Acked-by: Davidlohr Bueso <davidlohr@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoipc: update locking scheme comments
Davidlohr Bueso [Wed, 16 Oct 2013 20:46:45 +0000 (13:46 -0700)]
ipc: update locking scheme comments

The initial documentation was a bit incomplete, update accordingly.

[akpm@linux-foundation.org: make it more readable in 80 columns]
Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Acked-by: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agomm, memcg: protect mem_cgroup_read_events for cpu hotplug
David Rientjes [Wed, 16 Oct 2013 20:46:43 +0000 (13:46 -0700)]
mm, memcg: protect mem_cgroup_read_events for cpu hotplug

for_each_online_cpu() needs the protection of {get,put}_online_cpus() so
cpu_online_mask doesn't change during the iteration.

cpu_hotplug.lock is held while a cpu is going down, it's a coarse lock
that is used kernel-wide to synchronize cpu hotplug activity.  Memcg has
a cpu hotplug notifier, called while there may not be any cpu hotplug
refcounts, which drains per-cpu event counts to memcg->nocpu_base.events
to maintain a cumulative event count as cpus disappear.  Without
get_online_cpus() in mem_cgroup_read_events(), it's possible to account
for the event count on a dying cpu twice, and this value may be
significantly large.

In fact, all memcg->pcp_counter_lock use should be nested by
{get,put}_online_cpus().

This fixes that issue and ensures the reported statistics are not vastly
over-reported during cpu hotplug.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
11 years agoStaging: rtl8192u: use gfp_t instead of int
Teodora Baluta [Wed, 16 Oct 2013 20:53:33 +0000 (23:53 +0300)]
Staging: rtl8192u: use gfp_t instead of int

This patch fixes the following type of sparse warnings:

drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c:247:17: warning: incorrect type in argument 2 (different base types)
drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c:247:17:    expected restricted gfp_t [usertype] flags
drivers/staging/rtl8192u/ieee80211/ieee80211_tx.c:247:17:    got int [signed] gfp_mask

Signed-off-by: Teodora Baluta <teobaluta@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoStaging: rtl8192u: fix functions that should not be declared extern
Teodora Baluta [Wed, 16 Oct 2013 20:53:32 +0000 (23:53 +0300)]
Staging: rtl8192u: fix functions that should not be declared extern

These functions are already marked extern in the header file

drivers/staging/rtl8192u/r819xU_phy.c:1716:13: warning: function 'InitialGainOperateWorkItemCallBack' with external linkage has definition
drivers/staging/rtl8192u/r819xU_cmdpkt.c:497:12: warning: function 'cmpk_message_handle_rx' with external linkage has definition

Signed-off-by: Teodora Baluta <teobaluta@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoStaging: vt6655: Removal of Unused Function
Rashika Kheria [Wed, 16 Oct 2013 19:40:36 +0000 (01:10 +0530)]
Staging: vt6655: Removal of Unused Function

This patch removes unused function 'RFbShutDown' from file rf.c

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoStaging: vt6655: Fix Sparse Warning for Static Declarations
Rashika Kheria [Wed, 16 Oct 2013 19:37:30 +0000 (01:07 +0530)]
Staging: vt6655: Fix Sparse Warning for Static Declarations

This patch fixes the following Sparse Warnings in rf.c:

drivers/staging/vt6655/rf.c:58:21: warning: symbol 'dwAL2230InitTable' was not declared. Should it be static?
drivers/staging/vt6655/rf.c:76:21: warning: symbol 'dwAL2230ChannelTable0' was not declared. Should it be static?
drivers/staging/vt6655/rf.c:93:21: warning: symbol 'dwAL2230ChannelTable1' was not declared. Should it be static?
drivers/staging/vt6655/rf.c:110:15: warning: symbol 'dwAL2230PowerTable' was not declared. Should it be static?
drivers/staging/vt6655/rf.c:180:21: warning: symbol 'dwAL7230InitTable' was not declared. Should it be static?
drivers/staging/vt6655/rf.c:203:21: warning: symbol 'dwAL7230InitTableAMode' was not declared. Should it be static?
drivers/staging/vt6655/rf.c:222:21: warning: symbol 'dwAL7230ChannelTable0' was not declared. Should it be static?
drivers/staging/vt6655/rf.c:288:21: warning: symbol 'dwAL7230ChannelTable1' was not declared. Should it be static?
drivers/staging/vt6655/rf.c:352:21: warning: symbol 'dwAL7230ChannelTable2' was not declared. Should it be static?
drivers/staging/vt6655/rf.c:431:6: warning: symbol 's_bAL7230Init' was not declared. Should it be static?
drivers/staging/vt6655/rf.c:474:6: warning: symbol 's_bAL7230SelectChannel' was not declared. Should it be static?
drivers/staging/vt6655/rf.c:634:6: warning: symbol 'RFbAL2230Init' was not declared. Should it be static?
drivers/staging/vt6655/rf.c:681:6: warning: symbol 'RFbAL2230SelectChannel' was not declared. Should it be static?

Signed-off-by: Rashika Kheria <rashika.kheria@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agodriver core: Release device_hotplug_lock when store_mem_state returns EINVAL
Yasuaki Ishimatsu [Fri, 11 Oct 2013 06:36:25 +0000 (15:36 +0900)]
driver core: Release device_hotplug_lock when store_mem_state returns EINVAL

When inserting a wrong value to /sys/devices/system/memory/memoryX/state file,
following messages are shown. And device_hotplug_lock is never released.

================================================
[ BUG: lock held when returning to user space! ]
3.12.0-rc4-debug+ #3 Tainted: G        W
------------------------------------------------
bash/6442 is leaving the kernel with locks still held!
1 lock held by bash/6442:
 #0:  (device_hotplug_lock){+.+.+.}, at: [<ffffffff8146cbb5>] lock_device_hotplug_sysfs+0x15/0x50

This issue was introdued by commit fa2be40 (drivers: base: use standard
device online/offline for state change).

This patch releases device_hotplug_lcok when store_mem_state returns EINVAL.

Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Reviewed-by: Toshi Kani <toshi.kani@hp.com>
CC: Seth Jennings <sjenning@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
11 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Thu, 17 Oct 2013 00:18:18 +0000 (17:18 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/viro/vfs

Pull tmpfile fix from Al Viro:
 "A fix for double iput() in ->tmpfile() on ext3 and ext4; I'd fucked it
  up, Miklos has caught it"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  ext[34]: fix double put in tmpfile

11 years agoMerge tag 'dm-3.12-fix-cve' of git://git.kernel.org/pub/scm/linux/kernel/git/device...
Linus Torvalds [Thu, 17 Oct 2013 00:16:57 +0000 (17:16 -0700)]
Merge tag 'dm-3.12-fix-cve' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device-mapper fix from Alasdair Kergon:
 "A patch to avoid data corruption in a device-mapper snapshot.

  This is primarily a data corruption bug that all users of
  device-mapper snapshots will want to fix.  The CVE is due to a data
  leak under specific circumstances if, for example, the snapshot is
  presented to a virtual machine: a block written as data inside the VM
  can get interpreted incorrectly on the host outside the VM as
  metadata, causing the host to provide the VM with access to blocks it
  would not otherwise see.  This is likely to affect few, if any,
  people"

* tag 'dm-3.12-fix-cve' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm snapshot: fix data corruption

11 years agoMerge tag 'gpio-v3.12-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Thu, 17 Oct 2013 00:15:57 +0000 (17:15 -0700)]
Merge tag 'gpio-v3.12-3' of git://git./linux/kernel/git/linusw/linux-gpio

Pull gpio fixes from Linus Walleij:
 "Three GPIO fixes for the v3.12 series:
   - A fix to the Lynxpoint IRQ handler
   - Two late fixes to fallout from the gpiod refactoring"

* tag 'gpio-v3.12-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpiolib: let gpiod_request() return -EPROBE_DEFER
  gpiolib: safer implementation of desc_to_gpio()
  gpio/lynxpoint: check if the interrupt is enabled in IRQ handler