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>
This commit is contained in:
parent
0289b2e110
commit
60f2df8a29
|
@ -244,7 +244,6 @@ static void bt_clear_tag(struct blk_mq_bitmap_tags *bt, unsigned int tag)
|
|||
|
||||
bs = bt_wake_ptr(bt);
|
||||
if (bs && atomic_dec_and_test(&bs->wait_cnt)) {
|
||||
smp_mb__after_clear_bit();
|
||||
atomic_set(&bs->wait_cnt, bt->wake_cnt);
|
||||
bt_index_inc(&bt->wake_index);
|
||||
wake_up(&bs->wait);
|
||||
|
|
Loading…
Reference in a new issue