tree 29357144d3693b6569e6d525873c31c273c9cc56
parent 0289b2e110b7824b2f76d194ad6f8f0844e270ad
author Ming Lei <tom.leiming@gmail.com> 1399741309 +0800
committer Jens Axboe <axboe@fb.com> 1399758133 -0600

blk-mq: bitmap tag: remove barrier in bt_clear_tag()

The barrier isn't necessary because both atomic_dec_and_test()
and wake_up() implicate one barrier.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@fb.com>