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

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Signed-off-by: Nicholas Mc Guire <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: Linus Torvalds <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Nicholas Mc Guire authored and Ingo Molnar committed 2015-02-04 07:57:36 +01:00
1 parent 51587bcf31
commit de30ec4730
1 file changed
+1 -8
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kernel/sched/completion.c
+1 -8
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@@ -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);