21 static inline void bio_get_first_bvec(struct bio *bio, struct bio_vec *bv)  in bio_get_first_bvec()  argument
23 	*bv = mp_bvec_iter_bvec(bio->bi_io_vec, bio->bi_iter);  in bio_get_first_bvec()
26 static inline void bio_get_last_bvec(struct bio *bio, struct bio_vec *bv)  in bio_get_last_bvec()  argument
31 	bio_get_first_bvec(bio, bv);  in bio_get_last_bvec()
32 	if (bv->bv_len == bio->bi_iter.bi_size)  in bio_get_last_bvec()
42 	*bv = bio->bi_io_vec[idx];  in bio_get_last_bvec()
49 		bv->bv_len = iter.bi_bvec_done;  in bio_get_last_bvec()
222 static bool bvec_split_segs(struct queue_limits *lim, const struct bio_vec *bv,  in bvec_split_segs()  argument
227 	unsigned len = min(bv->bv_len, max_len);  in bvec_split_segs()
232 		seg_size = get_max_segment_size(lim, bv->bv_page,  in bvec_split_segs()
233 						bv->bv_offset + total_len);  in bvec_split_segs()
240 		if ((bv->bv_offset + total_len) & lim->virt_boundary_mask)  in bvec_split_segs()
247 	return len > 0 || bv->bv_len > max_len;  in bvec_split_segs()
273 	struct bio_vec bv, bvprv, *bvprvp = NULL;  in bio_split_rw()  local
277 	bio_for_each_bvec(bv, bio, iter) {  in bio_split_rw()
282 		if (bvprvp && bvec_gap_to_prev(lim, bvprvp, bv.bv_offset))  in bio_split_rw()
286 		    bytes + bv.bv_len <= max_bytes &&  in bio_split_rw()
287 		    bv.bv_offset + bv.bv_len <= PAGE_SIZE) {  in bio_split_rw()
289 			bytes += bv.bv_len;  in bio_split_rw()
291 			if (bvec_split_segs(lim, &bv, &nsegs, &bytes,  in bio_split_rw()
296 		bvprv = bv;  in bio_split_rw()
394 	struct bio_vec bv;  in blk_recalc_rq_segments()  local
416 	rq_for_each_bvec(bv, rq, iter)  in blk_recalc_rq_segments()
417 		bvec_split_segs(&rq->q->limits, &bv, &nr_phys_segs, &bytes,  in blk_recalc_rq_segments()
474 static inline int __blk_bvec_map_sg(struct bio_vec bv,  in __blk_bvec_map_sg()  argument
478 	sg_set_page(*sg, bv.bv_page, bv.bv_len, bv.bv_offset);  in __blk_bvec_map_sg()