writeback: remove smp_mb(), it's not needed with list_add_tail_rcu()
authorNick Piggin <npiggin@suse.de>
Tue, 15 Sep 2009 19:32:58 +0000 (21:32 +0200)
committerJens Axboe <jens.axboe@oracle.com>
Wed, 16 Sep 2009 13:18:52 +0000 (15:18 +0200)
list_add_tail_rcu contains required barriers.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

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