BLK_MQ_UNIQUE_TAG_BITS 288 include/linux/blk-mq.h BLK_MQ_UNIQUE_TAG_BITS = 16, BLK_MQ_UNIQUE_TAG_BITS 289 include/linux/blk-mq.h BLK_MQ_UNIQUE_TAG_MASK = (1 << BLK_MQ_UNIQUE_TAG_BITS) - 1, BLK_MQ_UNIQUE_TAG_BITS 296 include/linux/blk-mq.h return unique_tag >> BLK_MQ_UNIQUE_TAG_BITS;