[GIT PULL] posix cpu timers cleanups for 3.14

[Frederic Weisbecker <fweisbec@gmail.com>]

Ingo, Thomas,

Please pull the timers/posix-timers-for-tip branch that can be found at:

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
	timers/posix-timers-for-tip

HEAD: 239dd62b5c41bf606f3a3b3adb9e70341a62dbd3
It passed through 0-day testing.

This is another series of posix cpu timers cleanups. Note it's essentially the same
as: "posix-timers: Various cleanups" at http://lkml.org/lkml/2013/10/12/107 which
Peter Zijlstra had a look into. He told me that it looked ok. This version brings
almost no code change (just fix a NULL check ommitted somewhere), it's mostly a rebase
against 2.6.12 with refined changelogs.

It's a first pile but more is to come, as I have some more cleanups in mind. Plus
I plan to integrate more fixes from Kosaki Motohiro.

Changes:

* Remove a few irrelevant optimizations that were complicating the code a lot
* Consolidate local and remote clock read
* Remove dead leftovers
* Optimize the locking by removing unnecessary uses of tasklist lock
* Various other cleanups...

Thanks,
	Frederic
---

Frederic Weisbecker (10):
      posix-timers: Remove dead thread posix cpu timers caching
      posix-timers: Remove dead process posix cpu timers caching
      posix-timers: Cleanup reaped target handling
      posix-timers: Remove dead task special case
      posix-timers: Remove useless clock sample on timers cleanup
      posix-timers: Consolidate posix_cpu_clock_get()
      posix-timers: Use sighand lock instead of tasklist_lock for task clock sample
      posix-timers: Use sighand lock instead of tasklist_lock on timer deletion
      posix-timers: Remove remaining uses of tasklist_lock
      posix-timers: Convert abuses of BUG_ON to WARN_ON


 kernel/posix-cpu-timers.c | 309 +++++++++++++++++++---------------------------
 1 file changed, 129 insertions(+), 180 deletions(-)