thp: reduce khugepaged freezing latency

Use wait_event_freezable_timeout() instead of
schedule_timeout_interruptible() to avoid missing freezer wakeups.  A
try_to_freeze() would have been needed in the khugepaged_alloc_hugepage
tight loop too in case of the allocation failing repeatedly, and
wait_event_freezable_timeout will provide it too.

khugepaged would still freeze just fine by trying again the next minute
but it's better if it freezes immediately.

Reported-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Tested-by: Jiri Slaby <jslaby@suse.cz>
Cc: Tejun Heo <tj@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Cc: "Rafael J. Wysocki" <rjw@suse.com
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

fs/proc/meminfo.c: fix compilation error

Fix the error message "directives may not be used inside a macro argument"
which appears when the kernel is compiled for the cris architecture.

Signed-off-by: Claudio Scordino <claudio@evidence.eu.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

vmscan: use atomic-long for shrinker batching

Use atomic-long operations instead of looping around cmpxchg().

[akpm@linux-foundation.org: massage atomic.h inclusions]
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

vmscan: fix initial shrinker size handling

A shrinker function can return -1, means that it cannot do anything
without a risk of deadlock.  For example prune_super() does this if it
cannot grab a superblock refrence, even if nr_to_scan=0.  Currently we
interpret this -1 as a ULONG_MAX size shrinker and evaluate `total_scan'
according to this.  So the next time around this shrinker can cause really
big pressure.  Let's skip such shrinkers instead.

Also make total_scan signed, otherwise the check (total_scan < 0) below
never works.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Merge remote-tracking branch 'kvmtool/master'

Conflicts:
include/net/9p/9p.h
scripts/kconfig/Makefile

Merge remote-tracking branch 'vhost/linux-next'

Conflicts:
arch/hexagon/Kconfig
arch/m68k/Kconfig

Merge remote-tracking branch 'pinctrl/for-next'

Merge remote-tracking branch 'writeback/writeback-for-next'

Merge remote-tracking branch 'tmem/tmem'

Conflicts:
mm/swapfile.c

Merge remote-tracking branch 'char-misc/char-misc-next'

Merge remote-tracking branch 'staging/staging-next'

Conflicts:
drivers/staging/iio/adc/ad799x_core.c
drivers/staging/iio/industrialio-core.c

Merge remote-tracking branch 'usb/usb-next'

Merge remote-tracking branch 'tty/tty-next'

Conflicts:
drivers/tty/serial/Kconfig
drivers/tty/serial/Makefile

Merge remote-tracking branch 'driver-core/driver-core-next'

Merge remote-tracking branch 'hsi/for-next'

Merge remote-tracking branch 'regmap/for-next'

Merge remote-tracking branch 'namespace/master'

Merge remote-tracking branch 'sysctl/master'

Merge remote-tracking branch 'xen-two/linux-next'

Conflicts:
arch/x86/xen/Kconfig

Merge remote-tracking branch 'xen/upstream/xen'

Conflicts:
arch/x86/xen/Kconfig

Merge remote-tracking branch 'kmemleak/kmemleak'

Merge remote-tracking branch 'uprobes/for-next'

Merge remote-tracking branch 'tip/auto-latest'

Conflicts:
arch/mips/kernel/perf_event_mipsxx.c

Merge remote-tracking branch 'fsnotify/for-next'

Merge remote-tracking branch 'apm/for-next'

Merge remote-tracking branch 'pm/linux-next'

Conflicts:
kernel/cgroup_freezer.c

Merge remote-tracking branch 'trivial/for-next'

Merge remote-tracking branch 'osd/linux-next'

Merge remote-tracking branch 'cputime/cputime'

Merge remote-tracking branch 'iommu/next'

Merge remote-tracking branch 'watchdog/linux-next'

Merge remote-tracking branch 'security/next'

Conflicts:
lib/Makefile

Merge remote-tracking branch 'regulator/for-next'

Merge remote-tracking branch 'fbdev/fbdev-next'

Merge remote-tracking branch 'drm/drm-next'

Merge remote-tracking branch 'md/for-next'

Merge remote-tracking branch 'slab/for-next'

Merge remote-tracking branch 'kgdb/kgdb-next'

Merge remote-tracking branch 'mmc/mmc-next'

Merge remote-tracking branch 'battery/master'

Merge remote-tracking branch 'block/for-next'

Merge remote-tracking branch 'input/next'

Conflicts:
drivers/input/keyboard/samsung-keypad.c

Merge branch 'quilt/rr'

Merge remote-tracking branch 'cpufreq/next'

Merge remote-tracking branch 'sound-asoc/for-next'

Merge remote-tracking branch 'sound/for-next'

Merge remote-tracking branch 'crypto/master'

Merge remote-tracking branch 'l2-mtd/master'

Merge remote-tracking branch 'bluetooth/master'

Merge remote-tracking branch 'wireless-next/master'

Merge remote-tracking branch 'net-next/master'

Merge remote-tracking branch 'slave-dma/next'

Conflicts:
drivers/dma/pl330.c

Merge remote-tracking branch 'target-merge/for-next-merge'

Merge remote-tracking branch 'dlm/next'

Merge remote-tracking branch 'infiniband/for-next'

Merge remote-tracking branch 'libata/NEXT'

Merge remote-tracking branch 'kconfig/for-next'

Merge remote-tracking branch 'kbuild/for-next'

Merge remote-tracking branch 'v4l-dvb/master'

Conflicts:
drivers/staging/media/as102/as102_drv.h

Merge remote-tracking branch 'hwmon-staging/hwmon-next'

Merge branch 'quilt/jdelvare-hwmon'

Merge remote-tracking branch 'bjdooks-i2c/next-i2c'

Conflicts:
drivers/i2c/busses/i2c-designware-platdrv.c

Merge commit 'refs/next/20111128/hid'

Merge remote-tracking branch 'pci/linux-next'

Merge remote-tracking branch 'xfs/master'

Merge remote-tracking branch 'ubifs/linux-next'

Merge remote-tracking branch 'ocfs2/linux-next'

Merge remote-tracking branch 'nfsd/nfsd-next'

Merge remote-tracking branch 'logfs/master'

Conflicts:
fs/logfs/file.c

Merge remote-tracking branch 'gfs2/master'

Merge remote-tracking branch 'ecryptfs/next'

Merge remote-tracking branch 'cifs/master'

Merge remote-tracking branch 'xtensa/master'

Merge remote-tracking branch 's390/features'

Merge remote-tracking branch '52xx-and-virtex/powerpc/next'

Merge remote-tracking branch 'powerpc/next'

Merge remote-tracking branch 'parisc/for-next'

Merge remote-tracking branch 'mips/mips-for-linux-next'

Merge remote-tracking branch 'm68knommu/for-next'

Conflicts:
arch/m68k/Kconfig.debug

Merge remote-tracking branch 'm68k/for-next'

Merge remote-tracking branch 'ia64/next'

Merge branch 'quilt/hexagon'

Merge remote-tracking branch 'cris/for-next'

Merge remote-tracking branch 'c6x/for-linux-next'

Merge remote-tracking branch 'tegra/for-next'

Merge remote-tracking branch 's5p/for-next'

Conflicts:
arch/arm/mach-exynos/cpu.c
arch/arm/mach-exynos/include/mach/entry-macro.S

Merge remote-tracking branch 'i.MX/for-next'

Conflicts:
arch/arm/mach-imx/clock-mx51-mx53.c
arch/arm/mach-imx/devices-imx53.h
arch/arm/mach-imx/mm-imx5.c
arch/arm/mach-mx5/Kconfig
arch/arm/mach-mx5/Makefile
arch/arm/mach-mx5/pm-imx5.c
arch/arm/plat-mxc/include/mach/hardware.h

Merge remote-tracking branch 'at91/at91-next'

Conflicts:
arch/arm/mach-at91/at91cap9.c
arch/arm/mach-at91/at91sam9260.c
arch/arm/mach-at91/at91sam9261.c
arch/arm/mach-at91/at91sam9263.c
arch/arm/mach-at91/at91sam926x_time.c
arch/arm/mach-at91/at91sam9_alt_reset.S
arch/arm/mach-at91/at91sam9g45.c
arch/arm/mach-at91/at91sam9rl.c
arch/arm/mach-at91/generic.h
arch/arm/mach-at91/gpio.c
arch/arm/mach-at91/include/mach/at91cap9.h
arch/arm/mach-at91/include/mach/at91sam9260.h
arch/arm/mach-at91/include/mach/at91sam9261.h
arch/arm/mach-at91/include/mach/at91sam9263.h
arch/arm/mach-at91/include/mach/at91sam9g45.h
arch/arm/mach-at91/include/mach/at91sam9rl.h
arch/arm/mach-at91/include/mach/system.h
arch/arm/mach-at91/pm.c
arch/arm/mach-at91/setup.c

Merge remote-tracking branch 'arm-perf/for-next/perf'

Merge remote-tracking branch 'arm-soc/for-next'

Conflicts:
arch/arm/mach-at91/at91cap9.c
arch/arm/mach-at91/at91sam9260.c
arch/arm/mach-at91/at91sam9261.c
arch/arm/mach-at91/at91sam9263.c
arch/arm/mach-at91/at91sam9g45.c
arch/arm/mach-at91/at91sam9rl.c
arch/arm/mach-at91/setup.c
arch/arm/plat-omap/include/plat/common.h
arch/arm/tools/mach-types

Merge remote-tracking branch 'arm-lpae/for-next'

Conflicts:
arch/arm/include/asm/pgalloc.h
arch/arm/include/asm/pgtable.h
arch/arm/include/asm/tlb.h
arch/arm/mm/ioremap.c

Merge remote-tracking branch 'arm/for-next'

Merge remote-tracking branch 'staging.current/staging-linus'

Merge remote-tracking branch 'usb.current/usb-linus'

Merge remote-tracking branch 'wireless/master'

Merge remote-tracking branch 'sound-current/for-linus'

Merge remote-tracking branch 'net/master'

Merge remote-tracking branch 'arm-current/fixes'

net: Fix skb_update_prio RCU usage.

Change function rcu_dereference to rcu_dereference_bh to avoid warning

[ INFO: suspicious RCU usage. ]
-------------------------------
net/core/dev.c:2459 suspicious rcu_dereference_check() usage!

because we are locking with

rcu_read_lock_bh();

in function dev_queue_xmit(struct sk_buff *skb)

Signed-off-by: Igor Maravic <igorm@etf.rs>
Signed-off-by: David S. Miller <davem@davemloft.net>

PM / Domains: fix compilation failure for CONFIG_PM_GENERIC_DOMAINS unset

Fix the following compalitaion breakage:

In file included from linux/drivers/sh/pm_runtime.c:15:
linux/include/linux/pm_domain.h: In function 'dev_to_genpd':
linux/include/linux/pm_domain.h:142: error: implicit declaration of function 'ERR_PTR'
linux/include/linux/pm_domain.h:142: warning: return makes pointer from integer without a cast
In file included from linux/include/linux/sh_clk.h:10,
                 from linux/drivers/sh/pm_runtime.c:19:
linux/include/linux/err.h: At top level:
linux/include/linux/err.h:22: error: conflicting types for 'ERR_PTR'
linux/include/linux/pm_domain.h:142: note: previous implicit declaration of 'ERR_PTR' was here
make[3]: *** [drivers/sh/pm_runtime.o] Error 1

Reported-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>