struct gendisk *__blk_mq_alloc_disk(struct blk_mq_tag_set *set, void *queuedata,
		struct lock_class_key *lkclass)
struct gendisk *__blk_mq_alloc_disk(struct blk_mq_tag_set *set,
		struct queue_limits *lim, void *queuedata,
		struct lock_class_key *lkclass)