If the process using the hibernate user space interface closes
/dev/snapshot after creating a hibernation image without thawing
tasks, snapshot_release() should call pm_restore_gfp_mask() to
restore the GFP mask used before the creation of the image.  Make
that happen.
Tested-by: Alexandre Felipe Muller de Souza <alexandrefm@mandriva.com.br>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: stable@kernel.org

A warning is printed by pm_restrict_gfp_mask() while the
SNAPSHOT_S2RAM ioctl is being executed after creating a hibernation
image, because pm_restrict_gfp_mask() has been called once already
before the image creation and suspend_devices_and_enter() calls it
once again.  This happens after commit 452aa699
(mm/pm: force GFP_NOIO during suspend/hibernation and resume).

To avoid this issue, move pm_restrict_gfp_mask() and
pm_restore_gfp_mask() from suspend_devices_and_enter() to its caller
in kernel/power/suspend.c.
Reported-by: Alexandre Felipe Muller de Souza <alexandrefm@mandriva.com.br>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: stable@kernel.org

* 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus: (28 commits)
  MIPS: Alchemy: fix xxs1500 build error
  MIPS: Invalidate old TLB mappings when updating huge page PTEs.
  MIPS: Hibernation: Fixes for PAGE_SIZE >= 64kb
  MIPS: JZ4740: Set one-shot feature flag for the clockevent
  MIPS: JZ4740: Export symbols to the watchdog driver module
  MIPS: JZ4740: Fix GCC 4.6.0 build error.
  MIPS: Audit: Fix success success argument pass to audit_syscall_exit
  MIPS: Fix calc_vmlinuz_load_addr build warnings.
  MIPS: Alchemy: Fix GCC 4.6.0 build error.
  MIPS: Document former use of timerfd(2) syscall number.
  MIPS: IP27: Fix GCC 4.6.0 build error.
  MIPS: IP27: Fix GCC 4.6.0 build error.
  MIPS: bcm63xx: Fix header_crc comment in bcm963xx_tag.h
  MIPS: Octeon: Guard the Kconfig body with CPU_CAVIUM_OCTEON
  MIPS: Octeon: Cleanup Kconfig IRQ_CPU* symbols.
  MIPS: Rename .data..mostly and properly handle it in linker script
  MIPS: MSP: Fix build error
  MIPS: MSP71xx: Fix typo in msp_per_irq_controller
  MIPS: Loongson: Fix GCC 2.6.0 build error.
  MIPS: Jazz: Fix GCC 4.6.0 build error
  ...

* 'for-linus' of git://oss.sgi.com/xfs/xfs:
  xfs: fix race condition in AIL push trigger
  xfs: make AIL target updates and compares 32bit safe.
  xfs: always push the AIL to the target
  xfs: exit AIL push work correctly when AIL is empty
  xfs: ensure reclaim cursor is reset correctly at end of AG

This fixes:
alchemy/xxs1500/init.c: In function 'prom_init':
alchemy/xxs1500/init.c:57:17: error: ignoring return value of 'kstrtoul', declared with attribute warn_unused_result
Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/2340/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Without this, stale Icache or TLB entries may be used.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
https://patchwork.linux-mips.org/patch/2318/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

PAGE_SIZE >= 64kb (1 << 16) is too big to be the immediate of the
addiu/daddiu instruction, so, use addu/daddu instruction instead.

The following compiling error is fixed:

AS      arch/mips/power/hibernate.o
arch/mips/power/hibernate.S: Assembler messages:
arch/mips/power/hibernate.S:38: Error: expression out of range
make[2]: *** [arch/mips/power/hibernate.o] Error 1
make[1]: *** [arch/mips/power] Error 2
Reported-by: Roman Mamedov <rm@romanrm.ru>
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2313/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

The code for supporting one-shot mode for the clockevent is already there,
only the feature flag was not set.  Setting the one-shot flag allows the
kernel to run in tickless mode.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2261/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  MODPOST 356 modules
ERROR: "jz4740_timer_disable_watchdog" [drivers/watchdog/jz4740_wdt.ko] undefine
d!
ERROR: "jz4740_timer_enable_watchdog" [drivers/watchdog/jz4740_wdt.ko] undefined
!
make[1]: *** [__modpost] Error 1
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/jz4740/dma.o
arch/mips/jz4740/dma.c: In function 'jz4740_dma_chan_irq':
arch/mips/jz4740/dma.c:245:11: error: variable 'status' set but not used [-Werro
r=unused-but-set-variable]
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  HOSTCC  arch/mips/boot/compressed/calc_vmlinuz_load_addr
arch/mips/boot/compressed/calc_vmlinuz_load_addr.c: In function 'main':
arch/mips/boot/compressed/calc_vmlinuz_load_addr.c:35:2: warning: format '%llx' expects type 'long long unsigned int *', but argument 3 has type 'uint64_t *'
arch/mips/boot/compressed/calc_vmlinuz_load_addr.c:54:2: warning: format '%llx' expects type 'long long unsigned int', but argument 2 has type 'uint64_t'
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/alchemy/devboards/db1x00/board_setup.o
arch/mips/alchemy/devboards/db1x00/board_setup.c: In function 'board_setup':
arch/mips/alchemy/devboards/db1x00/board_setup.c:130:6: error: variable 'pin_func' set but not used [-Werror=unused-but-set-variable]
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/sgi-ip27/ip27-hubio.o
arch/mips/sgi-ip27/ip27-hubio.c: In function 'hub_pio_map':
arch/mips/sgi-ip27/ip27-hubio.c:32:20: error: variable 'junk' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/sgi-ip27/ip27-hubio.o
arch/mips/sgi-ip27/ip27-hubio.c: In function 'hub_pio_map':
arch/mips/sgi-ip27/ip27-hubio.c:32:20: error: variable 'junk' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

The CRC32 actually includes the tag_version.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2275/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Instead of making each Octeon specific option depend on
CPU_CAVIUM_OCTEON, gate the body of the entire file with
CPU_CAVIUM_OCTEON.  With this change, CAVIUM_OCTEON_SPECIFIC_OPTIONS
becomes useless, so get rid of it as well.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2091/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Octeon doesn't use IRQ_CPU, so don't select it.

IRQ_CPU_OCTEON is a completely unused symbol, remove it completely.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2086/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Reported and original patch by Yoichi Yuasa <yuasa@linux-mips.org>.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/pmc-sierra/msp71xx/msp_irq_per.o
arch/mips/pmc-sierra/msp71xx/msp_irq_per.c:101:2: error: expected identifier before '.' token
make[2]: *** [arch/mips/pmc-sierra/msp71xx/msp_irq_per.o] Error 1
Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/2246/
Cc: linux-mips <linux-mips@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/loongson/common/env.o
arch/mips/loongson/common/env.c: In function 'prom_init_env':
arch/mips/loongson/common/env.c:50:12: error: variable 'ret' set but not used [-Werror=unused-but-set-variable]
arch/mips/loongson/common/env.c:51:12: error: variable 'ret' set but not used [-Werror=unused-but-set-variable]
arch/mips/loongson/common/env.c:52:12: error: variable 'ret' set but not used [-Werror=unused-but-set-variable]
arch/mips/loongson/common/env.c:53:12: error: variable 'ret' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/jazz/jazzdma.o
arch/mips/jazz/jazzdma.c: In function 'vdma_remap':
arch/mips/jazz/jazzdma.c:214:20: error: variable 'npages' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/sni/time.o
arch/mips/sni/time.c: In function 'dosample':
arch/mips/sni/time.c:98:19: error: variable 'lsb' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/mti-malta/malta-int.o
arch/mips/mti-malta/malta-int.c: In function 'mips_pcibios_iack':
arch/mips/mti-malta/malta-int.c:59:6: error: variable 'dummy' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/mti-malta/malta-init.o
arch/mips/mti-malta/malta-init.c: In function 'prom_init':
arch/mips/mti-malta/malta-init.c:196:6: error: variable 'result' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/sgi-ip22/ip22-platform.o
arch/mips/sgi-ip22/ip22-platform.c: In function 'sgiseeq_devinit':
arch/mips/sgi-ip22/ip22-platform.c:135:15: error: variable 'tmp' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors

While at it rename the variable to pbdma for readability; there is a
local variable tmp of different type being used in two nested blocks.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/sgi-ip22/ip22-time.o
arch/mips/sgi-ip22/ip22-time.c: In function 'dosample':
arch/mips/sgi-ip22/ip22-time.c:35:10: error: variable 'lsb' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/mm/tlbex.o
arch/mips/mm/tlbex.c: In function 'build_r4000_tlb_refill_handler':
arch/mips/mm/tlbex.c:1155:22: error: variable 'vmalloc_mode' set but not used [-Werror=unused-but-set-variable]
arch/mips/mm/tlbex.c:1154:28: error: variable 'htlb_info' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

  CC      arch/mips/mm/c-r4k.o
arch/mips/mm/c-r4k.c: In function 'probe_scache':
arch/mips/mm/c-r4k.c:1078:6: error: variable 'tmp' set but not used [-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors

Older GCC versions didn't warn about the unused variable tmp because it was
getting initialized.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

The current code is abusing the uasm interface by passing jump target
addresses with high bits set.  Mask the addresses to avoid annoying
messages at boot time.
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Wu Zhangjin <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/1922/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2:
  nilfs2: fix infinite loop in nilfs_palloc_freev function

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  net/9p: Handle get_user_pages_fast return properly

After having applied commit 9954e7af ("nilfs2: add free
entries count only if clear bit operation succeeded"), a free routine
of nilfs came to fall into an infinite loop, outputting the same
message endlessly:

 nilfs_palloc_freev: entry number 29497 already freed
 nilfs_palloc_freev: entry number 29497 already freed
 nilfs_palloc_freev: entry number 29497 already freed
 nilfs_palloc_freev: entry number 29497 already freed
 nilfs_palloc_freev: entry number 29497 already freed ...

That patch broke the routine so that a loop counter is never updated
in an abnormal state.  This fixes the regression.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

Use proper data type to handle get_user_pages_fast error condition. Also
do not treat EFAULT error as fatal.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

Commit a626ca6a ("vm: fix vm_pgoff wrap in stack expansion") fixed
the case of an expanding mapping causing vm_pgoff wrapping when you had
downward stack expansion.  But there was another case where IA64 and
PA-RISC expand mappings: upward expansion.

This fixes that case too.
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux-2.6:
  drm/i915/lvds: Only act on lid notify when the device is on
  drm/i915: fix intel_crtc_clock_get pipe reads after "cleanup cleanup"
  drm/i915: Only enable the plane after setting the fb base (pre-ILK)
  drm/i915/dp: Be paranoid in case we disable a DP before it is attached
  drm/i915: Release object along create user fb error path

The recent conversion of the xfsaild functionality to a work queue
introduced a hard-to-hit log space grant hang. One is caused by a
race condition in determining whether there is a psh in progress or
not.

The XFS_AIL_PUSHING_BIT is used to determine whether a push is
currently in progress.  When the AIL push work completes, it checked
whether the target changed and cleared the PUSHING bit to allow a
new push to be requeued. The race condition is as follows:

	Thread 1		push work

	smp_wmb()
				smp_rmb()
				check ailp->xa_target unchanged
	update ailp->xa_target
	test/set PUSHING bit
	does not queue
				clear PUSHING bit
				does not requeue

Now that the push target is updated, new attempts to push the AIL
will not trigger as the push target will be the same, and hence
despite trying to push the AIL we won't ever wake it again.

The fix is to ensure that the AIL push work clears the PUSHING bit
before it checks if the target is unchanged.

As a result, both push triggers operate on the same test/set bit
criteria, so even if we race in the push work and miss the target
update, the thread requesting the push will still set the PUSHING
bit and queue the push work to occur. For safety sake, the same
queue check is done if the push work detects the target change,
though only one of the two will will queue new work due to the use
of test_and_set_bit() checks.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>

(cherry picked from commit e4d3c4a4)