Commit 3f5ab8cf authored by Johannes Weiner's avatar Johannes Weiner Committed by Linus Torvalds

mm: oom_kill: remove unnecessary locking in oom_enable()

Setting oom_killer_disabled to false is atomic, there is no need for
further synchronization with ongoing allocations trying to OOM-kill.
Signed-off-by: default avatarJohannes Weiner <hannes@cmpxchg.org>
Acked-by: default avatarMichal Hocko <mhocko@suse.cz>
Acked-by: default avatarDavid Rientjes <rientjes@google.com>
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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent febd5949
...@@ -488,9 +488,7 @@ bool oom_killer_disable(void) ...@@ -488,9 +488,7 @@ bool oom_killer_disable(void)
*/ */
void oom_killer_enable(void) void oom_killer_enable(void)
{ {
down_write(&oom_sem);
oom_killer_disabled = false; oom_killer_disabled = false;
up_write(&oom_sem);
} }
#define K(x) ((x) << (PAGE_SHIFT-10)) #define K(x) ((x) << (PAGE_SHIFT-10))
......
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