blk_mq_alloc_sched_tags
res->et = blk_mq_alloc_sched_tags(set, nr_hw_queues,
struct elevator_tags *blk_mq_alloc_sched_tags(struct blk_mq_tag_set *set,
et = blk_mq_alloc_sched_tags(set, q->nr_hw_queues, nr);