diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2011-06-10 15:08:55 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-07-01 10:39:07 +0200 |
| commit | 307bf9803f25a8a3f53c1012110fb74e2f893eb0 (patch) | |
| tree | 72146cbf22ea0e7d36a0734cca9d46291c40ca89 /kernel/sched_rt.c | |
| parent | sched: Remove rcu_read_lock() from wake_affine() (diff) | |
| download | linux-307bf9803f25a8a3f53c1012110fb74e2f893eb0.tar.xz linux-307bf9803f25a8a3f53c1012110fb74e2f893eb0.zip | |
sched: Simplify mutex_spin_on_owner()
It does not make sense to rcu_read_lock/unlock() in every loop
iteration while spinning on the mutex.
Move the rcu protection outside the loop. Also simplify the
return path to always check for lock->owner == NULL which
meets the requirements of both owner changed and need_resched()
caused loop exits.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/alpine.LFD.2.02.1106101458350.11814@ionos
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_rt.c')
0 files changed, 0 insertions, 0 deletions