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506,942 commits

Author SHA1 Message Date
Marek Vasut
e397ee0f22 crypto: caam - Sweep the remnants
Clean up the remnants from the rework. Constify function arguments.

Note that checkpatch again complains about this space before newline,
but this is the original code behavior, so I'm keeping it.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-08 21:58:11 +08:00
Marek Vasut
e22cdcfa13 crypto: caam - Kill SPRINTFCAT() with fire
This macro is just like an encyclopedia of string handling done wrong.
This must die. This is so wrong on so many levels.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-08 21:58:10 +08:00
Marek Vasut
4f0fa52a5d crypto: caam - Clean up report_deco_status()
Clean this function up and rework it into sensible shape. This function
now contains one single dev_err() instead of the previous insanity full
of memory allocation, chaotic string handling and use of SPRINTFCAT().

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-08 21:58:10 +08:00
Marek Vasut
1e16322da4 crypto: caam - Clean up report_ccb_status()
Clean this function up and rework it into sensible shape. This function
now contains one single dev_err() instead of the previous insanity full
of memory allocation, possible stack overwriting, chaotic string handling
and use of SPRINTFCAT().

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-08 21:58:09 +08:00
Marek Vasut
526243cc87 crypto: caam - Dissolve report_jump_idx()
Just dissolve this function so it's not in the way of applying
further white magic cleanup down the line.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-08 21:58:09 +08:00
Marek Vasut
e75880dd9a crypto: caam - Kill the easy targets
Fix the functions which can be obviously done right with a simple
dev_err() now. While at it, further press the on-stack allocation
of buffer for sprintf() voodoo down into the abominated functions.

This patch cleans up most of the functions and leaves just two
remaining functions, report_ccb_status() and report_deco_status()
ugly and unhappy.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-08 21:58:08 +08:00
Marek Vasut
8a47582682 crypto: caam - Pass error type into the functions
Pass the error type string into the functions, so they can handle
the printing of the string. This is now still using the very unsafe
sprintf(), but we will fix that.

While at this, pass the device pointer too, so we can dev_err()
functions readily when we start fixing this proper.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-08 21:58:08 +08:00
Marek Vasut
867e1ee395 crypto: caam - Implement fast-path for error codes with no handler
Implement fast-path error code printout for errors with no associated
handler function. This reduces calls to this kmalloc() nonsense in
SPRINTFCAT() already.

Note that the format of output is compatible with the old code, even
if -- exposed like this -- it looks a bit weird. Checkpatch complains
on this one as well.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-08 21:58:07 +08:00
Marek Vasut
9724d7adbb crypto: caam - Pull all the error codes out
Pull the error code <-> error string mapping tables out of the function
so the code becomes readable. This lets me see the real flesh of the
functions, without all that flab clouding the view.

Note: There is a checkpatch issue with quoted strings across multiple
      lines. I will fix that in a subsequent patch to keep the changes
      small and separate.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-08 21:58:07 +08:00
Marek Vasut
fa9659cd4d crypto: caam - Contain caam_jr_strstatus() ugliness
The tentacles of this function were firmly attached to various
places in the CAAM code. Just cut them, or this cthulhu function
will sprout them anew.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-08 21:58:06 +08:00
Arnd Bergmann
fe04e4297e PHY: Exynos: fix SATA phy license typo
If the license string doesn't match exactly, the module refuses to load.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
2014-05-08 19:24:35 +05:30
Roger Quadros
54f4d144eb phy: omap-usb2: Add clock names to Documentation binding
Add "wkupclk" and "refclk" information to DT binding information.

Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
2014-05-08 19:24:35 +05:30
Roger Quadros
9f1d8ed227 phy: omap-usb2: Use generic clock names "wkupclk" and "refclk"
As clocks might be named differently on multiple platforms, use a generic
name in the driver and allow device tree node to specify the platform
specific clock name.

Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
2014-05-08 19:22:16 +05:30
Harald Freudenberger
3901c1124e crypto: s390 - fix aes,des ctr mode concurrency finding.
An additional testcase found an issue with the last
series of patches applied: the fallback solution may
not save the iv value after operation. This very small
fix just makes sure the iv is copied back to the
walk/desc struct.

Cc: <stable@vger.kernel.org> # 3.14+
Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-05-08 21:46:09 +08:00
Gabriel L. Somlo
87c00572ba kvm: x86: emulate monitor and mwait instructions as nop
Treat monitor and mwait instructions as nop, which is architecturally
correct (but inefficient) behavior. We do this to prevent misbehaving
guests (e.g. OS X <= 10.7) from crashing after they fail to check for
monitor/mwait availability via cpuid.

Since mwait-based idle loops relying on these nop-emulated instructions
would keep the host CPU pegged at 100%, do NOT advertise their presence
via cpuid, to prevent compliant guests from using them inadvertently.

Signed-off-by: Gabriel L. Somlo <somlo@cmu.edu>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-05-08 15:40:49 +02:00
Mathieu Desnoyers
8058bd0faa tracepoint: Fix use of tracepoint funcs after rcu free
Commit de7b297390 "tracepoint: Use struct pointer instead of name hash
for reg/unreg tracepoints" introduces a use after free by calling
release_probes on the old struct tracepoint array before the newly
allocated array is published with rcu_assign_pointer. There is a race
window where tracepoints (RCU readers) can perform a
"use-after-grace-period-after-free", which shows up as a GPF in
stress-tests.

Link: http://lkml.kernel.org/r/53698021.5020108@oracle.com
Link: http://lkml.kernel.org/p/1399549669-25465-1-git-send-email-mathieu.desnoyers@efficios.com

Reported-by: Sasha Levin <sasha.levin@oracle.com>
CC: Oleg Nesterov <oleg@redhat.com>
CC: Dave Jones <davej@redhat.com>
Fixes: de7b297390 "tracepoint: Use struct pointer instead of name hash for reg/unreg tracepoints"
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-05-08 09:10:56 -04:00
Kuninori Morimoto
29e69fd2cd ASoC: rsnd: remove compatibility code
Now, all platform is using new style rsnd_dai_platform_info.
Keeping compatibility is no longer needed.
We can cleanup code.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-05-08 12:17:59 +01:00
Kuninori Morimoto
5e392ea0da ASoC: rsnd: remove old clock style support
All platform which used old style was
switched to new style.
R-Car sound can remove old style clock support,
use device dependent clock now.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-05-08 12:17:59 +01:00
Mark Brown
86327bb880 Renesas ARM Based SoC Clock Updates for v3.16
SH Mobile shared clock code
 * Introduce shmobile_clk_workaround()
 
 r8a7791 (R-Car M2) SoC
 * Rename VSP1_SY clocks to VSP1_S
 * Correct the I2C clocks parents
 
 r8a7790 (R-Car H2) SoC
 * Remove old style audio clock
 * Rename VSP1_(SY|RT) clocks to VSP1_(S|R)
 * Fix the I2C clocks parents
 
 r8a7778 (R-Car M1) SoC
 * Remove old style audio clock
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mergetag object a09b2f0ba1
 type commit
 tag renesas-boards-for-v3.16
 tagger Simon Horman <horms@verge.net.au> 1397774188 +0900
 
 Renesas ARM Based SoC Boards Updates for v3.16
 
 r8a7791 (R-Car M2) based Koelsch board
 * Enable Quad SPI transfers for the SPI FLASH
 * Clock workarounds for Ether, I2C, MSIOF, Quad SPI and SDHI
 * Use shmobile_clk_workaround()
 
 r8a7790 (R-Car H2) based Lager board
 * Enable Quad SPI transfers for the SPI FLASH
 * Switch to use dai info for R-Car sound
 * Clock workarounds for Ether, MSIOF, MMCIF, Quad SPI and SDHI
 * Use shmobile_clk_workaround()
 
 r8a7778 (R-Car M1) based Bock-W board
 * Switch to use dai info for R-Car sound
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Merge tags 'renesas-clock-for-v3.16' and 'renesas-boards-for-v3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into asoc-rcar

Renesas ARM Based SoC Clock Updates for v3.16

SH Mobile shared clock code
* Introduce shmobile_clk_workaround()

r8a7791 (R-Car M2) SoC
* Rename VSP1_SY clocks to VSP1_S
* Correct the I2C clocks parents

r8a7790 (R-Car H2) SoC
* Remove old style audio clock
* Rename VSP1_(SY|RT) clocks to VSP1_(S|R)
* Fix the I2C clocks parents

r8a7778 (R-Car M1) SoC
* Remove old style audio clock

Renesas ARM Based SoC Boards Updates for v3.16

r8a7791 (R-Car M2) based Koelsch board
* Enable Quad SPI transfers for the SPI FLASH
* Clock workarounds for Ether, I2C, MSIOF, Quad SPI and SDHI
* Use shmobile_clk_workaround()

r8a7790 (R-Car H2) based Lager board
* Enable Quad SPI transfers for the SPI FLASH
* Switch to use dai info for R-Car sound
* Clock workarounds for Ether, MSIOF, MMCIF, Quad SPI and SDHI
* Use shmobile_clk_workaround()

r8a7778 (R-Car M1) based Bock-W board
* Switch to use dai info for R-Car sound
2014-05-08 12:17:31 +01:00
Stratos Karafotis
5eeaf1f189 cpufreq: Fix build error on some platforms that use cpufreq_for_each_*
On platforms that use cpufreq_for_each_* macros, build fails if
CONFIG_CPU_FREQ=n, e.g. ARM/shmobile/koelsch/non-multiplatform:

drivers/built-in.o: In function `clk_round_parent':
clkdev.c:(.text+0xcf168): undefined reference to `cpufreq_next_valid'
drivers/built-in.o: In function `clk_rate_table_find':
clkdev.c:(.text+0xcf820): undefined reference to `cpufreq_next_valid'
make[3]: *** [vmlinux] Error 1

Fix this making cpufreq_next_valid function inline and move it to
cpufreq.h.

Fixes: 27e289dce2 (cpufreq: Introduce macros for cpufreq_frequency_table iteration)
Reported-and-tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-08 13:10:56 +02:00
Rafael J. Wysocki
37c1479487 Merge back earlier 'pm-cpufreq' material. 2014-05-08 13:06:38 +02:00
Romain Izard
098507ae3e trace: module: Maintain a valid user count
The replacement of the 'count' variable by two variables 'incs' and
'decs' to resolve some race conditions during module unloading was done
in parallel with some cleanup in the trace subsystem, and was integrated
as a merge.

Unfortunately, the formula for this replacement was wrong in the tracing
code, and the refcount in the traces was not usable as a result.

Use 'count = incs - decs' to compute the user count.

Link: http://lkml.kernel.org/p/1393924179-9147-1-git-send-email-romain.izard.pro@gmail.com

Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: stable@vger.kernel.org # 2.6.35
Fixes: c1ab9cab75 "merge conflict resolution"
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2014-05-08 07:05:18 -04:00
Igor Mammedov
0b9d46dd7d ACPI / processor: do not mark present at boot but not onlined CPU as onlined
acpi_processor_add() assumes that present at boot CPUs
are always onlined, it is not so if a CPU failed to become
onlined. As result acpi_processor_add() will mark such CPU
device as onlined in sysfs and following attempts to
online/offline it using /sys/device/system/cpu/cpuX/online
attribute will fail.

Do not poke into device internals in acpi_processor_add()
and touch "struct device { .offline }" attribute, since
for CPUs onlined at boot it's set by:
  topology_init() -> arch_register_cpu() -> register_cpu()
before ACPI device tree is parsed, and for hotplugged
CPUs it's set when userspace onlines CPU via sysfs.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>
Cc: 3.11+ <stable@vger.kernel.org> # 3.11+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-08 12:59:36 +02:00
Luciano Coelho
f29f58a9e5 mac80211: fix sparse warning caused by __ieee80211_channel_switch()
Commit 59af6928 (mac80211: fix CSA tx queue stopping) introduced a
sparse warning:

net/mac80211/cfg.c:3274:5: warning: symbol '__ieee80211_channel_switch' was not declared. Should it be static?

Fix it by declaring the function static.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-05-08 12:00:12 +02:00
Luciano Coelho
c3d620362d cfg80211: fix docbook warning
When trying to generate documentation, at least xmldocs, we get the
following warning:

Warning(include/net/cfg80211.h:461): No description found for parameter 'nl80211_iftype'

Fix it by adding the iftype argument name to the
cfg80211_chandef_dfs_required() function declaration.

Reported-and-tested-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-05-08 11:59:35 +02:00
Michal Kazior
cf8767dd76 mac80211: disconnect iface if CSA unexpectedly fails
It doesn't make much sense to leave a crippled
interface running.

As a side effect this will unblock tx queues with
CSA reason immediately after failure instead of
until after userspace requests interface to stop.

This also gives userspace an opportunity to
indirectly see CSA failure.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
[small code cleanup]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-05-08 11:57:27 +02:00
Ard Biesheuvel
190f1ca85d arm64: add support for kernel mode NEON in interrupt context
This patch modifies kernel_neon_begin() and kernel_neon_end(), so
they may be called from any context. To address the case where only
a couple of registers are needed, kernel_neon_begin_partial(u32) is
introduced which takes as a parameter the number of bottom 'n' NEON
q-registers required. To mark the end of such a partial section, the
regular kernel_neon_end() should be used.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
2014-05-08 11:31:57 +02:00
Ard Biesheuvel
005f78cd88 arm64: defer reloading a task's FPSIMD state to userland resume
If a task gets scheduled out and back in again and nothing has touched
its FPSIMD state in the mean time, there is really no reason to reload
it from memory. Similarly, repeated calls to kernel_neon_begin() and
kernel_neon_end() will preserve and restore the FPSIMD state every time.

This patch defers the FPSIMD state restore to the last possible moment,
i.e., right before the task returns to userland. If a task does not return to
userland at all (for any reason), the existing FPSIMD state is preserved
and may be reused by the owning task if it gets scheduled in again on the
same CPU.

This patch adds two more functions to abstract away from straight FPSIMD
register file saves and restores:
- fpsimd_restore_current_state -> ensure current's FPSIMD state is loaded
- fpsimd_flush_task_state -> invalidate live copies of a task's FPSIMD state

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
2014-05-08 11:31:57 +02:00
Ard Biesheuvel
c51f92693c arm64: add abstractions for FPSIMD state manipulation
There are two tacit assumptions in the FPSIMD handling code that will no longer
hold after the next patch that optimizes away some FPSIMD state restores:
. the FPSIMD registers of this CPU contain the userland FPSIMD state of
  task 'current';
. when switching to a task, its FPSIMD state will always be restored from
  memory.

This patch adds the following functions to abstract away from straight FPSIMD
register file saves and restores:
- fpsimd_preserve_current_state -> ensure current's FPSIMD state is saved
- fpsimd_update_current_state -> replace current's FPSIMD state

Where necessary, the signal handling and fork code are updated to use the above
wrappers instead of poking into the FPSIMD registers directly.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
2014-05-08 11:31:41 +02:00
Chao Yu
70ff5dfeb6 f2fs: use inode_init_owner() to simplify codes
This patch uses exported inode_init_owner() to simplify codes in
f2fs_new_inode().

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-08 18:23:21 +09:00
Chao Yu
adf8d90b6a f2fs: avoid to use slab memory in f2fs_issue_flush for efficiency
If we use slab memory in f2fs_issue_flush(), we will face memory pressure and
latency time caused by racing of kmem_cache_{alloc,free}.

Let's alloc memory in stack instead of slab.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
2014-05-08 18:23:21 +09:00
Ard Biesheuvel
0567f5facb asm-generic: allow generic unaligned access if the arch supports it
Switch the default unaligned access method to 'hardware implemented'
if HAVE_EFFICIENT_UNALIGNED_ACCESS is set.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2014-05-08 10:22:23 +02:00
Oder Chiou
71bfa9b4d6 ASoC: rt5645: fix coccinelle warnings
Return statements in functions returning bool should use
true/false instead of 1/0.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-05-08 09:02:41 +01:00
Oder Chiou
0f776efd86 ASoC: rt5645: Correct the cache sync function
The patch corrects the cache sync function

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-05-08 09:02:41 +01:00
Oder Chiou
4809b96ebb ASoC: rt5645: Move settings from probe() to reg_default struct
The patch moves the private register settings from probe() to reg_default
struct.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-05-08 09:02:41 +01:00
Micky Ching
98fcc5762d mmc: rtsx: Revert "mmc: rtsx: add support for pre_req and post_req"
This reverts commit c42deffd5b.

commit <mmc: rtsx: add support for pre_req and post_req> did use
mutex_unlock() in tasklet, but mutex_unlock() can't be used in
tasklet(atomic context). The driver needs to use mutex to avoid
concurrency, so we can't use tasklet here, the patch need to be
removed.

The spinlock host->lock and pcr->lock may deadlock, one way to solve
the deadlock is remove host->lock in sd_isr_done_transfer(), but if
using workqueue the we can avoid using the spinlock and also avoid
the problem.

Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-05-08 08:44:50 +01:00
Rafael J. Wysocki
08c373e512 sched/idle: Make cpuidle_idle_call() void
The only value ever returned by cpuidle_idle_call() is 0 and its
only caller ignores that value anyway, so make it void.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/4717784.WmVEpDoliM@vostro.rjw.lan
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-05-08 09:17:00 +02:00
Peter Zijlstra
37352273ad sched/idle: Reflow cpuidle_idle_call()
Apply goto to reduce lines and nesting levels.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/n/tip-cc6vb0snt3sr7op6rlbfeqfh@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-05-08 09:16:59 +02:00
Peter Zijlstra
c444117f0f sched/idle: Delay clearing the polling bit
With the generic idle functions assuming !polling we should only clear
the polling bit at the very last opportunity in order to avoid
spurious IPIs.

Ideally we'd flip the default to polling, but that means auditing all
arch idle functions.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/n/tip-vq7719foqzf6z5h4j7eh7f9e@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-05-08 09:16:58 +02:00
Peter Zijlstra
fd99f91aa0 sched/idle: Avoid spurious wakeup IPIs
Because mwait_idle_with_hints() gets called from !idle context it must
call current_clr_polling(). This however means that resched_task() is
very likely to send an IPI even when we were polling:

  CPU0					CPU1

  if (current_set_polling_and_test())
    goto out;

  __monitor(&ti->flags);
  if (!need_resched())
    __mwait(eax, ecx);
					set_tsk_need_resched(p);
					smp_mb();
out:
  current_clr_polling();
					if (!tsk_is_polling(p))
					  smp_send_reschedule(cpu);

So while it is correct (extra IPIs aren't a problem, whereas a missed
IPI would be) it is a performance problem (for some).

Avoid this issue by using fetch_or() to atomically set NEED_RESCHED
and test if POLLING_NRFLAG is set.

Since a CPU stuck in mwait is unlikely to modify the flags word,
contention on the cmpxchg is unlikely and thus we should mostly
succeed in a single go.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/n/tip-kf5suce6njh5xf5d3od13rr0@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-05-08 09:16:58 +02:00
Peter Zijlstra
69dd0f8488 sched/idle: Remove TS_POLLING support
Now that there are no architectures left using it, kill the support
for TS_POLLING.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/n/tip-6yurip2tfix2f4bfc5agu2s0@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-05-08 09:16:57 +02:00
Peter Zijlstra
f80c5b39b8 sched/idle, x86: Switch from TS_POLLING to TIF_POLLING_NRFLAG
Standardize the idle polling indicator to TIF_POLLING_NRFLAG such that
both TIF_NEED_RESCHED and TIF_POLLING_NRFLAG are in the same word.
This will allow us, using fetch_or(), to both set NEED_RESCHED and
check for POLLING_NRFLAG in a single operation and avoid pointless
wakeups.

Changing from the non-atomic thread_info::status flags to the atomic
thread_info::flags shouldn't be a big issue since most polling state
changes were followed/preceded by a full memory barrier anyway.

Also, fix up the apm_32 idle function, clearly that was forgotten in
the last conversion. The default idle state is !POLLING so just kill
the lot.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <srostedt@redhat.com>
Link: http://lkml.kernel.org/n/tip-7yksmqtlv4nfowmlqr1rifoi@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-05-08 09:16:56 +02:00
Peter Zijlstra
0407542533 sched/idle, ia64: Switch from TS_POLLING to TIF_POLLING_NRFLAG
Standardize the idle polling indicator to TIF_POLLING_NRFLAG such that
both TIF_NEED_RESCHED and TIF_POLLING_NRFLAG are in the same word.
This will allow us, using fetch_or(), to both set NEED_RESCHED and
check for POLLING_NRFLAG in a single operation and avoid pointless
wakeups.

Changing from the non-atomic thread_info::status flags to the atomic
thread_info::flags shouldn't be a big issue since most polling state
changes were followed/preceded by a full memory barrier anyway.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: linux-ia64@vger.kernel.org
Link: http://lkml.kernel.org/n/tip-6633akuird5hi3si4gbegkm8@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-05-08 09:16:55 +02:00
Peter Zijlstra
b3a8cb18ce sched/idle, tile: Switch from TS_POLLING to TIF_POLLING_NRFLAG
Standardize the idle polling indicator to TIF_POLLING_NRFLAG such that
both TIF_NEED_RESCHED and TIF_POLLING_NRFLAG are in the same word.
This will allow us, using fetch_or(), to both set NEED_RESCHED and
check for POLLING_NRFLAG in a single operation and avoid pointless
wakeups.

Changing from the non-atomic thread_info::status flags to the atomic
thread_info::flags shouldn't be a big issue since most polling state
changes were followed/preceded by a full memory barrier anyway.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/n/tip-35zzwlvwr7cp8xj196y10yyx@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-05-08 09:16:54 +02:00
Peter Zijlstra
2a705ad65c sched/idle, alpha: Switch from TS_POLLING to TIF_POLLING_NRFLAG
Standardize the idle polling indicator to TIF_POLLING_NRFLAG such that
both TIF_NEED_RESCHED and TIF_POLLING_NRFLAG are in the same word.
This will allow us, using fetch_or(), to both set NEED_RESCHED and
check for POLLING_NRFLAG in a single operation and avoid pointless
wakeups.

Changing from the non-atomic thread_info::status flags to the atomic
thread_info::flags shouldn't be a big issue since most polling state
changes were followed/preceded by a full memory barrier anyway.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Richard Henderson <rth@twiddle.net>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: 蔡正龙 <zhenglong.cai@cs2c.com.cn>
Cc: linux-alpha@vger.kernel.org
Link: http://lkml.kernel.org/n/tip-9tfzr196gs0n2afxv0ga8pc3@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-05-08 09:16:53 +02:00
Oder Chiou
9e22f7826a ASoC: rt5645: Staticise non-exported symbols
The patch is for staticising non-exported symbols

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-05-08 08:00:43 +01:00
Oder Chiou
92e160ddf6 ASoC: rt5645: Remove the unused variable
The patch is for removing the unused variable.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2014-05-08 08:00:43 +01:00
Xiubo Li
0c9a03b685 leds: Remove duplicated OOM message for individual driver
The OOM message of individual driver is unnecessary, and this is
duplicate the memory subsystem generic OOM message.

Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
2014-05-08 14:28:08 +08:00
Christoph Lameter
24c9301ffd drivers/leds: Replace __get_cpu_var use through this_cpu_ptr
Use this_cpu_ptr for the address calculation instead of __get_cpu_var.

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
2014-05-08 14:28:08 +08:00
Daniel Mack
9ef8c877e4 leds: lp55xx: add DT bindings for LP55231
The TI55231 appears to be fully compatible to the 5523 model from
National Semicondutor. This patch just adds DT bindings for it.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
2014-05-08 14:28:08 +08:00