linux-master/block/blk-lib.c

39 		sector_t nr_sects, gfp_t gfp_mask, struct bio **biop)
57 	if ((sector | nr_sects) & bs_mask)
60 	if (!nr_sects)
63 	while (nr_sects) {
65 			min(nr_sects, bio_discard_limit(bdev, sector));
71 		nr_sects -= req_sects;
91  * @nr_sects:	number of sectors to discard
98 		sector_t nr_sects, gfp_t gfp_mask)
105 	ret = __blkdev_issue_discard(bdev, sector, nr_sects, gfp_mask, &bio);
119 		sector_t sector, sector_t nr_sects, gfp_t gfp_mask,
134 	while (nr_sects) {
135 		unsigned int len = min_t(sector_t, nr_sects, max_sectors);
143 		nr_sects -= len;
156  * where nr_sects is lower than the number of sectors in a page.
158 static unsigned int __blkdev_sectors_to_bio_pages(sector_t nr_sects)
160 	sector_t pages = DIV_ROUND_UP_SECTOR_T(nr_sects, PAGE_SIZE / 512);
166 		sector_t sector, sector_t nr_sects, gfp_t gfp_mask,
176 	while (nr_sects != 0) {
177 		bio = blk_next_bio(bio, bdev, __blkdev_sectors_to_bio_pages(nr_sects),
181 		while (nr_sects != 0) {
182 			sz = min((sector_t) PAGE_SIZE, nr_sects << 9);
184 			nr_sects -= bi_size >> 9;
200  * @nr_sects:	number of sectors to write
216 		sector_t nr_sects, gfp_t gfp_mask, struct bio **biop,
223 	if ((sector | nr_sects) & bs_mask)
226 	ret = __blkdev_issue_write_zeroes(bdev, sector, nr_sects, gfp_mask,
231 	return __blkdev_issue_zero_pages(bdev, sector, nr_sects, gfp_mask,
240  * @nr_sects:	number of sectors to write
250 		sector_t nr_sects, gfp_t gfp_mask, unsigned flags)
259 	if ((sector | nr_sects) & bs_mask)
266 		ret = __blkdev_issue_write_zeroes(bdev, sector, nr_sects,
269 		ret = __blkdev_issue_zero_pages(bdev, sector, nr_sects,
301 		sector_t nr_sects, gfp_t gfp)
316 	if ((sector | nr_sects) & bs_mask)
322 	while (nr_sects) {
323 		unsigned int len = min_t(sector_t, nr_sects, max_sectors);
330 		nr_sects -= len;