staging: binder: Change binder mutex to rtmutex.

Surfaceflinger uses binder heavily to receive/send frames from applications
while compositing the screen. Change the binder mutex to an rt mutex to minimize
instances where high priority surfaceflinger binder work is blocked by lower
priority binder ipc.

Signed-off-by: Riley Andrews <riandrews@google.com>
Change-Id: I086a715267648448f0c5f62b037a3093d1079a79
Power: add an API to log wakeup reasons

Add API log_wakeup_reason() and expose it to userspace via sysfs path
/sys/kernel/wakeup_reasons/last_resume_reason

Change-Id: I81addaf420f1338255c5d0638b0d244a99d777d1
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
POWER: fix compile warnings in log_wakeup_reason

Change I81addaf420f1338255c5d0638b0d244a99d777d1 introduced compile
warnings, fix these.

Change-Id: I05482a5335599ab96c0a088a7d175c8d4cf1cf69
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
Power: Add guard condition for maximum wakeup reasons

Ensure the array for the wakeup reason IRQs does not overflow.

Change-Id: Iddc57a3aeb1888f39d4e7b004164611803a4d37c
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
(cherry picked from commit b5ea40cdfcf38296535f931a7e5e7bf47b6fad7f)
power: wakeup_reason: rename irq_count to irqcount

On x86, irq_count conflicts with a declaration in
arch/x86/include/asm/processor.h

Change-Id: I3e4fde0ff64ef59ff5ed2adc0ea3a644641ee0b7
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Power: Changes the permission to read only for sysfs file
/sys/kernel/wakeup_reasons/last_resume_reason

Change-Id: I8ac568a7cb58c31decd379195de517ff3c6f9c65
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>