From 464027785ff633468ecbb683ede14672d514b3d3 Mon Sep 17 00:00:00 2001
From: Johannes Weiner <hannes@cmpxchg.org>
Date: Wed, 24 Jun 2015 16:57:10 -0700
Subject: [PATCH] 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>
---
 mm/oom_kill.c | 3 +--
 1 file changed, 1 insertion(+), 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);
 	/*
-- 
2.34.1