554 				struct request *next)  in ll_merge_requests_fn()  argument
558 		req->biotail->bi_seg_back_size + next->bio->bi_seg_front_size;  in ll_merge_requests_fn()
564 	if (req_no_special_merge(req) || req_no_special_merge(next))  in ll_merge_requests_fn()
567 	if (req_gap_back_merge(req, next->bio))  in ll_merge_requests_fn()
573 	if ((blk_rq_sectors(req) + blk_rq_sectors(next)) >  in ll_merge_requests_fn()
577 	total_phys_segments = req->nr_phys_segments + next->nr_phys_segments;  in ll_merge_requests_fn()
578 	if (blk_phys_contig_segment(q, req->biotail, next->bio)) {  in ll_merge_requests_fn()
581 		if (next->nr_phys_segments == 1)  in ll_merge_requests_fn()
582 			next->biotail->bi_seg_back_size = seg_size;  in ll_merge_requests_fn()
589 	if (blk_integrity_merge_rq(q, req, next) == false)  in ll_merge_requests_fn()
648 			  struct request *next)  in attempt_merge()  argument
650 	if (!rq_mergeable(req) || !rq_mergeable(next))  in attempt_merge()
653 	if (!blk_check_merge_flags(req->cmd_flags, next->cmd_flags))  in attempt_merge()
659 	if (blk_rq_pos(req) + blk_rq_sectors(req) != blk_rq_pos(next))  in attempt_merge()
662 	if (rq_data_dir(req) != rq_data_dir(next)  in attempt_merge()
663 	    || req->rq_disk != next->rq_disk  in attempt_merge()
664 	    || req_no_special_merge(next))  in attempt_merge()
668 	    !blk_write_same_mergeable(req->bio, next->bio))  in attempt_merge()
677 	if (!ll_merge_requests_fn(q, req, next))  in attempt_merge()
686 	if ((req->cmd_flags | next->cmd_flags) & REQ_MIXED_MERGE ||  in attempt_merge()
688 	    (next->cmd_flags & REQ_FAILFAST_MASK)) {  in attempt_merge()
690 		blk_rq_set_mixed_merge(next);  in attempt_merge()
699 	if (time_after(req->start_time, next->start_time))  in attempt_merge()
700 		req->start_time = next->start_time;  in attempt_merge()
702 	req->biotail->bi_next = next->bio;  in attempt_merge()
703 	req->biotail = next->biotail;  in attempt_merge()
705 	req->__data_len += blk_rq_bytes(next);  in attempt_merge()
707 	elv_merge_requests(q, req, next);  in attempt_merge()
712 	blk_account_io_merge(next);  in attempt_merge()
714 	req->ioprio = ioprio_best(req->ioprio, next->ioprio);  in attempt_merge()
715 	if (blk_rq_cpu_valid(next))  in attempt_merge()
716 		req->cpu = next->cpu;  in attempt_merge()
719 	next->bio = NULL;  in attempt_merge()
720 	__blk_put_request(q, next);  in attempt_merge()
726 	struct request *next = elv_latter_request(q, rq);  in attempt_back_merge()  local
728 	if (next)  in attempt_back_merge()
729 		return attempt_merge(q, rq, next);  in attempt_back_merge()
745 			  struct request *next)  in blk_attempt_req_merge()  argument
747 	return attempt_merge(q, rq, next);  in blk_attempt_req_merge()