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GFS2: Remove unnecessary memory barrier

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Function test_and_clear_bit implies a memory barrier, so subsequent
memory barriers are unnecessary.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Bob Peterson 2013-07-25 09:53:49 -04:00 committed by Steven Whitehouse
parent 9d35814355
commit 068213f7d3
1 changed files with 0 additions and 1 deletions
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fs/gfs2/glock.c
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@ -1411,7 +1411,6 @@ __acquires(&lru_lock)
if (demote_ok(gl))
handle_callback(gl, LM_ST_UNLOCKED, 0, false);
WARN_ON(!test_and_clear_bit(GLF_LOCK, &gl->gl_flags));
smp_mb__after_clear_bit();
if (queue_delayed_work(glock_workqueue, &gl->gl_work, 0) == 0)
gfs2_glock_put_nolock(gl);
spin_unlock(&gl->gl_spin);