212  * bvec_split_segs - verify whether or not a bvec should be split in the middle
213  * @lim:      [in] queue limits to split based on
225  * big to fit in a single segment and hence that it has to be split in the
255 	/* tell the caller to split the bvec if it is too big to fit */  in bvec_split_segs()
260  * bio_split_rw - split a bio in two bios
261  * @bio:  [in] bio to be split
262  * @lim:  [in] queue limits to split based on
277  * split bio has finished.
292 			goto split;  in bio_split_rw()
302 				goto split;  in bio_split_rw()
311 split:  in bio_split_rw()
326 	 * split size so that each bio is properly block size aligned, even if  in bio_split_rw()
334 	 * big IO can be trival, disable iopoll when split needed.  in bio_split_rw()
342  * __bio_split_to_limits - split a bio to fit the queue limits
343  * @bio:     bio to be split
344  * @lim:     queue limits to split based on
347  * Check if @bio needs splitting based on the queue limits, and if so split off
351  * The split bio is allocated from @q->bio_split, which is provided by the
359 	struct bio *split;  in __bio_split_to_limits()  local
364 		split = bio_split_discard(bio, lim, nr_segs, bs);  in __bio_split_to_limits()
367 		split = bio_split_write_zeroes(bio, lim, nr_segs, bs);  in __bio_split_to_limits()
370 		split = bio_split_rw(bio, lim, nr_segs, bs,  in __bio_split_to_limits()
372 		if (IS_ERR(split))  in __bio_split_to_limits()
377 	if (split) {  in __bio_split_to_limits()
378 		/* there isn't chance to merge the split bio */  in __bio_split_to_limits()
379 		split->bi_opf |= REQ_NOMERGE;  in __bio_split_to_limits()
381 		blkcg_bio_issue_init(split);  in __bio_split_to_limits()
382 		bio_chain(split, bio);  in __bio_split_to_limits()
383 		trace_block_split(split, bio->bi_iter.bi_sector);  in __bio_split_to_limits()
385 		return split;  in __bio_split_to_limits()
391  * bio_split_to_limits - split a bio to fit the queue limits
392  * @bio:     bio to be split
395  * if so split off a bio fitting the limits from the beginning of @bio and
398  * The split bio is allocated from @q->bio_split, which is provided by the