BLK_MQ_UNIQUE_TAG_BITS  558 block/blk-mq-tag.c 	return (rq->mq_hctx->queue_num << BLK_MQ_UNIQUE_TAG_BITS) |
BLK_MQ_UNIQUE_TAG_BITS 3057 block/blk-mq.c 	BUILD_BUG_ON(BLK_MQ_MAX_DEPTH > 1 << BLK_MQ_UNIQUE_TAG_BITS);