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mm: oom_kill: switch test-and-clear of known TIF_MEMDIE to clear

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exit_oom_victim() already knows that TIF_MEMDIE is set, and nobody else
can clear it concurrently.  Use clear_thread_flag() directly.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner 2015-06-24 16:57:10 -07:00 committed by Linus Torvalds
parent 16e951966f
commit 464027785f
1 changed files with 1 additions and 2 deletions
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3
mm/oom_kill.c
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@ -435,8 +435,7 @@ void mark_oom_victim(struct task_struct *tsk)
*/
void exit_oom_victim(void)
{
if (!test_and_clear_thread_flag(TIF_MEMDIE))
return;
clear_thread_flag(TIF_MEMDIE);
down_read(&oom_sem);
/*