tree a9e5db4bb0cdd568002b735aa795109e9f9d4f32
parent e87ac1368700af66c295afa47e5c7df0d9d8b919
author Miao Xie <miaox@cn.fujitsu.com> 1392890935 +0800
committer Josef Bacik <jbacik@fb.com> 1394479001 -0400

Btrfs: remove unnecessary memory barrier in btrfs_sync_log()

Mutex unlock implies certain memory barriers to make sure all the memory
operation completes before the unlock, and the next mutex lock implies memory
barriers to make sure the all the memory happens after the lock. So it is
a full memory barrier(smp_mb), we needn't add memory barriers. Remove them.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>