179  * bvec_split_segs - verify whether or not a bvec should be split in the middle
192  * big to fit in a single segment and hence that it has to be split in the
223 	/* tell the caller to split the bvec if it is too big to fit */  in bvec_split_segs()
228  * blk_bio_segment_split - split a bio in two bios
230  * @bio:  [in] bio to be split
244  * split bio has finished.
263 			goto split;  in blk_bio_segment_split()
272 			goto split;  in blk_bio_segment_split()
281 split:  in blk_bio_segment_split()
287  * __blk_queue_split - split a bio and submit the second half
288  * @bio:     [in, out] bio to be split
291  * Split a bio into two bios, chain the two bios, submit the second half and
293  * big it will be split by a recursive call to this function. Since this
297  * split bio has finished.
302 	struct bio *split = NULL;  in __blk_queue_split()  local
307 		split = blk_bio_discard_split(q, *bio, &q->bio_split, nr_segs);  in __blk_queue_split()
310 		split = blk_bio_write_zeroes_split(q, *bio, &q->bio_split,  in __blk_queue_split()
314 		split = blk_bio_write_same_split(q, *bio, &q->bio_split,  in __blk_queue_split()
333 		split = blk_bio_segment_split(q, *bio, &q->bio_split, nr_segs);  in __blk_queue_split()
337 	if (split) {  in __blk_queue_split()
339 		split->bi_opf |= REQ_NOMERGE;  in __blk_queue_split()
341 		bio_chain(split, *bio);  in __blk_queue_split()
342 		trace_block_split(q, split, (*bio)->bi_iter.bi_sector);  in __blk_queue_split()
344 		*bio = split;  in __blk_queue_split()
351  * blk_queue_split - split a bio and submit the second half
352  * @bio: [in, out] bio to be split
354  * Split a bio into two bios, chains the two bios, submit the second half and
358  * after processing of the split bio has finished.