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Commit 8a1c1757 authored by Andrew Morton's avatar Andrew Morton Committed by Linus Torvalds
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[PATCH] schedule_timeout_[un]interruptible() speedup 



These functions don't need schedule_timeout()'s barrier.

Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 498d0c57

kernel/timer.c

+6 −3
Original line number Diff line number Diff line
@@ -1151,19 +1151,22 @@ fastcall signed long __sched schedule_timeout(signed long timeout) 
 out:

	return timeout < 0 ? 0 : timeout;

}



EXPORT_SYMBOL(schedule_timeout);



/*

 * We can use __set_current_state() here because schedule_timeout() calls

 * schedule() unconditionally.

 */

signed long __sched schedule_timeout_interruptible(signed long timeout)

{

       set_current_state(TASK_INTERRUPTIBLE);

       __set_current_state(TASK_INTERRUPTIBLE);

       return schedule_timeout(timeout);

}

EXPORT_SYMBOL(schedule_timeout_interruptible);



signed long __sched schedule_timeout_uninterruptible(signed long timeout)

{

       set_current_state(TASK_UNINTERRUPTIBLE);

       __set_current_state(TASK_UNINTERRUPTIBLE);

       return schedule_timeout(timeout);

}

EXPORT_SYMBOL(schedule_timeout_uninterruptible);