md: dm-crypt: Add option to re-use a new global work-queue.

Typically, dm-crypt instances each have their own set of kcrypt/kcrypt_io
work-queues. This patch adds an option which will create one set of
work-queues on init, and re-uses them for all dm-crypt target instances
in order to cut down on resource overhead on embedded systems.

NOTE: If you use stacked dm-crypt instances, then enabling this option
may cause a deadlock.

Cc: Milan Broz <mbroz@redhat.com>
Cc: Brian Swetland <swetland@google.com>
Cc: Andrew Morton <apkm@linux-foundation.org>
Cc: Christophe Saout <christophe@saout.de>
Signed-off-by: San Mehat <san@google.com>
msm: Quiet remap message

Make the arch_ioremap message a pr_debug as it isn't very
useful normally.

Change-Id: I2a6198024f6692c0e4648445d0ab6428e3952028
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
scripts:conf.c Fix warning: variable 'type' set but not used

Not sure if this is correct or not, but with
make menuconfig
  HOSTCC  scripts/kconfig/conf.o
scripts/kconfig/conf.c: In function 'conf_sym':
scripts/kconfig/conf.c:159:6: warning: variable 'type' set but not used
scripts/kconfig/conf.c: In function 'conf_choice':
scripts/kconfig/conf.c:231:6: warning: variable 'type' set but not used
  HOSTLD  scripts/kconfig/mconf

I get this using gcc 4.6.0 the below change fixes this form me.

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
staging: binder: Fix use of uninitialized variable.

Under an extremely rare condition, the variable return_error may
not be set.  This patch initializes the value to a known "bad"
value, and checks before return to ensure return_error has been
set.

Signed-off-by: Nick Kralevich <nnk@google.com>
ashmem: Fix flush routine of ashmem

The ashmem flush function ashmem_flush_cache_range was calling
dmac_clean_range and dmac_flush_range with a user virtual address
which is not allowed. Instead of calling dmac_clean_range or
dmac_flush_range use flush_cache_user_range which can be called
with a user vitual address.

Change-Id: I5dd137fb248b45ef2c7ea5f7bdb4b540b8310af9
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>
mm: ashmem: Add cache clean and invalidate ioctls for ashmem

Change-Id: Idc120f9f869c1a68e5f012327aa7f599ac065fce
CRs-fixed: 291124
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>
Fix spelling mistake in jhash

Fix a spelling mistake.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Kbuild: Export ashmem header file to user space

Change-Id: I60c49b3b85b88e98843c27160dbf1c9bc5032302
CRs-fixed: 291124
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>
The new jhash implementation

The current jhash.h implements the lookup2() hash function by Bob Jenkins.
However, lookup2() is outdated as Bob wrote a new hash function called
lookup3(). The patch replaces the lookup2() implementation of the 'jhash*'
functions with that of lookup3().

You can read a longer comparison of the two and other hash functions at
http://burtleburtle.net/bob/hash/doobs.html.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
ipv6: Prepare the tree for un-inlined jhash.

jhash is widely used in the kernel and because the functions
are inlined, the cost in size is significant. Also, the new jhash
functions are slightly larger than the previous ones so better un-inline.
As a preparation step, the calls to the internal macros are replaced
with the plain jhash function calls.

Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>
cgroups: export cgroup_iter_{start,next,end}

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
cgroups: introduce timer slack subsystem

Provides a way of tasks grouping by timer slack value. Introduces per
cgroup max and min timer slack value. When a task attaches to a cgroup,
its timer slack value adjusts (if needed) to fit min-max range.

It also provides a way to set timer slack value for all tasks in the
cgroup at once.

This functionality is useful in mobile devices where certain background
apps are attached to a cgroup and minimum wakeups are desired.

Idea-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
PM: wakelocks: Don't report wake up wakelock if suspend aborted

If the wakelock driver aborts suspend due to an already-held
wakelock, don't report the next wakelock held as the "wake up
wakelock".

Change-Id: I582ffbb87a3c361739a77d839a0c62921cff11a6
Signed-off-by: Todd Poynor <toddpoynor@google.com>
PM: wakelocks: Display wakelocks preventing suspend by default

Use DEBUG_WAKEUP flag to show wakelocks that abort suspend, in
addition to showing wakelocks held during system resume.
DEBUG_WAKEUP is enabled by default.

Change-Id: If6fa68e8afbc482a5300ffab2964694b02b34f41
Signed-off-by: Todd Poynor <toddpoynor@google.com>
lib/sha1: use the git implementation of SHA-1

For ChromiumOS, we use SHA-1 to verify the integrity of the root
filesystem.  The speed of the kernel sha-1 implementation has a major
impact on our boot performance.

To improve boot performance, we investigated using the heavily optimized
sha-1 implementation used in git.  With the git sha-1 implementation, we
see a 11.7% improvement in boot time.

10 reboots, remove slowest/fastest.

Before:

  Mean: 6.58 seconds Stdev: 0.14

After (with git sha-1, this patch):

  Mean: 5.89 seconds Stdev: 0.07

The other cool thing about the git SHA-1 implementation is that it only
needs 64 bytes of stack for the workspace while the original kernel
implementation needed 320 bytes.

Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Cc: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Cc: Nicolas Pitre <nico@cam.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: David S. Miller <davem@davemloft.net>
Cc: linux-crypto@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arm: remove "optimized" SHA1 routines

Since commit 1eb19a12bd22 ("lib/sha1: use the git implementation of
SHA-1"), the ARM SHA1 routines no longer work.  The reason? They
depended on the larger 320-byte workspace, and now the sha1 workspace is
just 16 words (64 bytes).  So the assembly version would overwrite the
stack randomly.

The optimized asm version is also probably slower than the new improved
C version, so there's no reason to keep it around.  At least that was
the case in git, where what appears to be the same assembly language
version was removed two years ago because the optimized C BLK_SHA1 code
was faster.

Reported-and-tested-by: Joachim Eastwood <manabian@gmail.com>
Cc: Andreas Schwab <schwab@linux-m68k.org>
Cc: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arm: remove stale export of 'sha_transform'

The generic library code already exports the generic function, this was
left-over from the ARM-specific version that just got removed.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
PM QoS: Correct pr_debug() misuse and improve parameter checks

Correct some pr_debug() misuse and add a stronger parameter check to
pm_qos_write() for the ASCII hex value case.  Thanks to Dan Carpenter
for pointing out the problem!

Signed-off-by: mark gross <markgross@thegnar.org>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
[CPUFREQ] drivers/cpufreq: Adjust confusing if indentation

Indent the body of for_each_cpu.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r disable braces4@
position p1,p2;
statement S1,S2;
@@

(
if (...) { ... }
|
if (...) S1@p1 S2@p2
)

@script:python@
p1 << r.p1;
p2 << r.p2;
@@

if (p1[0].column == p2[0].column):
  cocci.print_main("branch",p1)
  cocci.print_secs("after",p2)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Dave Jones <davej@redhat.com>
[CPUFREQ] Remove the pm_message_t argument from driver suspend

None of the existing cpufreq drivers uses the second argument of
its .suspend() callback (which isn't useful anyway), so remove it.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Dave Jones <davej@redhat.com>