mutex: Use p->on_cpu for the adaptive spin
authorPeter Zijlstra <a.p.zijlstra@chello.nl>
Tue, 5 Apr 2011 15:23:41 +0000 (17:23 +0200)
committerIngo Molnar <mingo@elte.hu>
Thu, 14 Apr 2011 06:52:33 +0000 (08:52 +0200)
commitc6eb3dda25892f1f974f5420f63e6721aab02f6f
treeb9be3e193dcfeda3589832be10189085cde496c5
parent3ca7a440da394808571dad32d33d3bc0389982e6
mutex: Use p->on_cpu for the adaptive spin

Since we now have p->on_cpu unconditionally available, use it to
re-implement mutex_spin_on_owner.

Requested-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frank Rowand <frank.rowand@am.sony.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20110405152728.826338173@chello.nl
include/linux/mutex.h
include/linux/sched.h
kernel/mutex-debug.c
kernel/mutex-debug.h
kernel/mutex.c
kernel/mutex.h
kernel/sched.c