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Commit de30ec47 authored by Nicholas Mc Guire's avatar Nicholas Mc Guire Committed by Ingo Molnar
Browse files

sched/completion: Remove unnecessary ->wait.lock serialization when reading completion state 



Signed-off-by: default avatarNicholas Mc Guire <der.herr@hofr.at>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1421467534-22834-1-git-send-email-der.herr@hofr.at


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 51587bcf

kernel/sched/completion.c

+1 −8
Original line number Diff line number Diff line
@@ -288,13 +288,6 @@ EXPORT_SYMBOL(try_wait_for_completion); 
 */

bool completion_done(struct completion *x)

{

	unsigned long flags;

	int ret = 1;



	spin_lock_irqsave(&x->wait.lock, flags);

	if (!x->done)

		ret = 0;

	spin_unlock_irqrestore(&x->wait.lock, flags);

	return ret;

	return !!ACCESS_ONCE(x->done);

}

EXPORT_SYMBOL(completion_done);