diff options
Diffstat (limited to 'block/blk-mq-tag.c')
| -rw-r--r-- | block/blk-mq-tag.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index 6c78c08865e3..a81b138e89fe 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -236,7 +236,11 @@ static void bt_clear_tag(struct blk_mq_bitmap_tags *bt, unsigned int tag) const int index = TAG_TO_INDEX(bt, tag); struct bt_wait_state *bs; - clear_bit(TAG_TO_BIT(bt, tag), &bt->map[index].word); + /* + * The unlock memory barrier need to order access to req in free + * path and clearing tag bit + */ + clear_bit_unlock(TAG_TO_BIT(bt, tag), &bt->map[index].word); bs = bt_wake_ptr(bt); if (bs && atomic_dec_and_test(&bs->wait_cnt)) { |