18 		struct request *prev_rq, struct bio *prev, struct bio *next)  in bio_will_gap()  argument
47 	bio_get_first_bvec(next, &nb);  in bio_will_gap()
643 		struct request *next)  in req_attempt_discard_merge()  argument
649 	if (blk_rq_sectors(req) + bio_sectors(next->bio) >  in req_attempt_discard_merge()
653 	req->nr_phys_segments = segments + blk_rq_nr_discard_segments(next);  in req_attempt_discard_merge()
661 				struct request *next)  in ll_merge_requests_fn()  argument
665 	if (req_gap_back_merge(req, next->bio))  in ll_merge_requests_fn()
671 	if ((blk_rq_sectors(req) + blk_rq_sectors(next)) >  in ll_merge_requests_fn()
675 	total_phys_segments = req->nr_phys_segments + next->nr_phys_segments;  in ll_merge_requests_fn()
679 	if (!blk_cgroup_mergeable(req, next->bio))  in ll_merge_requests_fn()
682 	if (blk_integrity_merge_rq(q, req, next) == false)  in ll_merge_requests_fn()
685 	if (!bio_crypt_ctx_merge_rq(req, next))  in ll_merge_requests_fn()
733 					struct request *next)  in blk_try_req_merge()  argument
737 	else if (blk_rq_pos(req) + blk_rq_sectors(req) == blk_rq_pos(next))  in blk_try_req_merge()
748 				     struct request *req, struct request *next)  in attempt_merge()  argument
750 	if (!rq_mergeable(req) || !rq_mergeable(next))  in attempt_merge()
753 	if (req_op(req) != req_op(next))  in attempt_merge()
756 	if (rq_data_dir(req) != rq_data_dir(next)  in attempt_merge()
757 	    || req->rq_disk != next->rq_disk)  in attempt_merge()
761 	    !blk_write_same_mergeable(req->bio, next->bio))  in attempt_merge()
768 	if (req->write_hint != next->write_hint)  in attempt_merge()
771 	if (req->ioprio != next->ioprio)  in attempt_merge()
782 	switch (blk_try_req_merge(req, next)) {  in attempt_merge()
784 		if (!req_attempt_discard_merge(q, req, next))  in attempt_merge()
788 		if (!ll_merge_requests_fn(q, req, next))  in attempt_merge()
801 	if (((req->rq_flags | next->rq_flags) & RQF_MIXED_MERGE) ||  in attempt_merge()
803 	    (next->cmd_flags & REQ_FAILFAST_MASK)) {  in attempt_merge()
805 		blk_rq_set_mixed_merge(next);  in attempt_merge()
813 	if (next->start_time_ns < req->start_time_ns)  in attempt_merge()
814 		req->start_time_ns = next->start_time_ns;  in attempt_merge()
816 	req->biotail->bi_next = next->bio;  in attempt_merge()
817 	req->biotail = next->biotail;  in attempt_merge()
819 	req->__data_len += blk_rq_bytes(next);  in attempt_merge()
822 		elv_merge_requests(q, req, next);  in attempt_merge()
824 	blk_crypto_rq_put_keyslot(next);  in attempt_merge()
829 	blk_account_io_merge_request(next);  in attempt_merge()
831 	trace_block_rq_merge(next);  in attempt_merge()
837 	next->bio = NULL;  in attempt_merge()
838 	return next;  in attempt_merge()
844 	struct request *next = elv_latter_request(q, rq);  in attempt_back_merge()  local
846 	if (next)  in attempt_back_merge()
847 		return attempt_merge(q, rq, next);  in attempt_back_merge()
869 			   struct request *next)  in blk_attempt_req_merge()  argument
871 	return attempt_merge(q, rq, next);  in blk_attempt_req_merge()