BLK_MQ_UNIQUE_TAG_MASK 559 block/blk-mq-tag.c (rq->tag & BLK_MQ_UNIQUE_TAG_MASK); BLK_MQ_UNIQUE_TAG_MASK 289 include/linux/blk-mq.h BLK_MQ_UNIQUE_TAG_MASK = (1 << BLK_MQ_UNIQUE_TAG_BITS) - 1,