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authorJohannes Weiner <hannes@cmpxchg.org>2015-06-24 16:57:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-06-24 17:49:43 -0700
commit464027785ff633468ecbb683ede14672d514b3d3 (patch)
tree8b4666cc3d1f2e25af0ba78fa9f328fc65b7406c
parent16e951966f05da5ccd650104176f6ba289f7fa20 (diff)
downloadlinux-464027785ff633468ecbb683ede14672d514b3d3.tar.bz2
mm: oom_kill: switch test-and-clear of known TIF_MEMDIE to clear
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>
-rw-r--r--mm/oom_kill.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index b2f081fe4b1a..4b9547be9170 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -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);
/*