[GIT PULL v2] posix cpu timers cleanups for 3.14

From: Frederic Weisbecker
Date: Mon Dec 09 2013 - 13:24:34 EST


Ingo, Thomas,

Please pull the timers/posix-timers-for-tip-v2 branch that can be found at:

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
timers/posix-timers-for-tip-v2

HEAD: 531f64fd6f46a3f2a3edb1b97ecc827c775932c5

This is the second version of the pull request that I sent you a few weeks ago:
http://lkml.kernel.org/r/1385221040-24731-1-git-send-email-fweisbec@xxxxxxxxx

Changes in this v2:

* rebase against latest tip:timers/core (there was a conflict with some dynticks
patches)

* add a cleanup suggested by Kosaki in patch 02/10: remove a useless group
timer sample snapshot and rearm on timer rescheduling.

Also the previous pull request lacked a high level overall description, so I'm
adding one here.

---

Posix cpu timers changes for 3.14:

* Remove dying thread/process timers caching that were complicating the code
for no significant win.

* Remove early task reference release on dying timer sample read. Again it was
not worth the code complication. The other timer's resources aren't released until
timer_delete() is called anyway (or when the whole process dies).

* Remove leftover arguments in reaped target cleanup

* Consolidate some timer sampling code

* Remove use of tasklist lock

* Robustify sighand locking against exec and exit by using the safer
lock_task_sighand() API instead of sighand raw locking.

* Convert some unnecessary BUG_ON() to WARN_ON()


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 | 312 +++++++++++++++++++---------------------------
1 file changed, 129 insertions(+), 183 deletions(-)
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