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kernel/watchdog.c: add comment to watchdog() exit path

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Revelation from Peter.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@tglx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton 2012-03-23 15:01:56 -07:00 committed by Linus Torvalds
parent 4501980aae
commit b60f796c4c
1 changed files with 4 additions and 0 deletions
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4
kernel/watchdog.c
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@ -349,6 +349,10 @@ static int watchdog(void *unused)
set_current_state(TASK_INTERRUPTIBLE);
}
/*
* Drop the policy/priority elevation during thread exit to avoid a
* scheduling latency spike.
*/
__set_current_state(TASK_RUNNING);
sched_setscheduler(current, SCHED_NORMAL, &param);
return 0;