blk_mq_insert_request
blk_mq_insert_request(rq, at_head ? BLK_MQ_INSERT_AT_HEAD : 0);
blk_mq_insert_request(rq, at_head ? BLK_MQ_INSERT_AT_HEAD : 0);
blk_mq_insert_request(rq, BLK_MQ_INSERT_AT_HEAD);
blk_mq_insert_request(rq, 0);
blk_mq_insert_request(rq, 0);
blk_mq_insert_request(rq, 0);
blk_mq_insert_request(rq, 0);
blk_mq_insert_request(rq, 0);
static void blk_mq_insert_request(struct request *rq, blk_insert_t flags);