203  * bvec_split_segs - verify whether or not a bvec should be split in the middle
204  * @lim:      [in] queue limits to split based on
216  * big to fit in a single segment and hence that it has to be split in the
246 	/* tell the caller to split the bvec if it is too big to fit */  in bvec_split_segs()
251  * bio_split_rw - split a bio in two bios
252  * @bio:  [in] bio to be split
253  * @lim:  [in] queue limits to split based on
268  * split bio has finished.
283 			goto split;  in bio_split_rw()
293 				goto split;  in bio_split_rw()
302 split:  in bio_split_rw()
307 	 * split size so that each bio is properly block size aligned, even if  in bio_split_rw()
315 	 * big IO can be trival, disable iopoll when split needed.  in bio_split_rw()
322  * __bio_split_to_limits - split a bio to fit the queue limits
323  * @bio:     bio to be split
324  * @lim:     queue limits to split based on
327  * Check if @bio needs splitting based on the queue limits, and if so split off
331  * The split bio is allocated from @q->bio_split, which is provided by the
338 	struct bio *split;  in __bio_split_to_limits()  local
343 		split = bio_split_discard(bio, lim, nr_segs, bs);  in __bio_split_to_limits()
346 		split = bio_split_write_zeroes(bio, lim, nr_segs, bs);  in __bio_split_to_limits()
349 		split = bio_split_rw(bio, lim, nr_segs, bs,  in __bio_split_to_limits()
354 	if (split) {  in __bio_split_to_limits()
356 		split->bi_opf |= REQ_NOMERGE;  in __bio_split_to_limits()
358 		blkcg_bio_issue_init(split);  in __bio_split_to_limits()
359 		bio_chain(split, bio);  in __bio_split_to_limits()
360 		trace_block_split(split, bio->bi_iter.bi_sector);  in __bio_split_to_limits()
362 		return split;  in __bio_split_to_limits()
368  * bio_split_to_limits - split a bio to fit the queue limits
369  * @bio:     bio to be split
372  * if so split off a bio fitting the limits from the beginning of @bio and
375  * The split bio is allocated from @q->bio_split, which is provided by the