Squashed update of kernel from 3.4.51 to 3.4.52
hrtimer: Introduce effective timer slack

task_get_effective_timer_slack() returns timer slack value to be used
to configure per-task timers. It can be equal or higher than task's
timer slack value.

For now task_get_effective_timer_slack() returns timer_slack_ns of the
task. Timer slack cgroup controller will implement a bit more
sophisticated logic.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Cristoforo Cataldo <cristoforo.cataldo@gmail.com>
hrtimer: Implement PR_GET_EFFECTIVE_TIMERSLACK

PR_GET_EFFECTIVE_TIMERSLACK allows process to know its effective timer
slack value.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Cristoforo Cataldo <cristoforo.cataldo@gmail.com>
cgroups: Introduce timer slack controller

Every task_struct has timer_slack_ns value. This value uses to round up
poll() and select() timeout values. This feature can be useful in
mobile environment where combined wakeups are desired.

Originally, prctl() was the only way to change timer slack value of
a process. So you was not able change timer slack value of another
process.

cgroup subsys "timer_slack" implements timer slack controller. It
provides a way to set minimal timer slack value for a group of tasks.
If a task belongs to a cgroup with minimal timer slack value higher than
task's value, cgroup's value will be applied.

Timer slack controller allows to implement setting timer slack value of
a process based on a policy. For example, you can create foreground and
background cgroups and move tasks between them based on system state.

Idea-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Cristoforo Cataldo <cristoforo.cataldo@gmail.com>
kernel: cgroup_timer_slack: Adaptations for 3.4 kernel

Signed-off-by: Cristoforo Cataldo <cristoforo.cataldo@gmail.com>
kernel: cgroup_timer_slack: Dynamic management of timer slack

This feature allows to use different minimal timer slack values and to
dynamically manage them when the system has been resumed (it's active)
or when has been suspended.

A new file is provided in addition to the two files provided by the
original timer slack controller:
- "timer_slack.min_slack_suspend_ns" is the minimal timer slack value
  to use when the system is suspended (screen off)

For further info, please refers to the timer slack documentation:
Documentation/cgroupd/timer_slack.txt

Signed-off-by: Cristoforo Cataldo <cristoforo.cataldo@gmail.com>
mmc: msm_sdcc: check for pending_resume in SDCC system suspend

If system comes out of suspend, msmsdcc_pm_resume() sets the
host->pending_resume flag if the SDCC wasn't runtime suspended.
Now if the system again goes to suspend without any SDCC activity
then host->pending_resume flag will remain set which may cause the SDCC
resume to happen first and then suspend.

To avoid this unnecessary resume/suspend, make sure that pending_resume
flag is cleared before calling the msmsdcc_runtime_suspend().

CRs-Fixed: 438081
Change-Id: I2b667bec704f938a532d4780dd9b7937e2eb12c7
Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Create Own Defconfig
Updated default and custom configs
+ PM / Sleep: Print name of wakeup source that aborts suspend -> https://www.codeaurora.org/gitweb/quic/la/?p=kernel/common.git;a=commitdiff;h=20a29931ecb3bd9b291b42a6ef62a412d2b3746e
+ wakeup: Use irqsave/irqrestore for events_lock by John Stultz -> https://kernel.googlesource.com/pub/scm/linux/kernel/git/kas/linux-android-ia/+/v3.5.3-aia2