[PATCH for-6.18/block 16/16] md/raid0: convert raid0_make_request() to use bio_submit_split_bioset()

Yu Kuai
2025-09-05T07:16:11Z

From: Yu Kuai <yukuai3@huawei.com>

Currently, raid0_make_request() will remap the original bio to underlying
disks to prevent reordered IO. Now that bio_submit_split_bioset() will put
original bio to the head of current->bio_list, it's safe converting to use
this helper and bio will still be ordered.

CC: Jan Kara <jack@suse.cz>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
---
drivers/md/raid0.c | 13 ++-----------
1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index ca08ec2e1f27..adc9e68d064d 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -607,19 +607,10 @@ static bool raid0_make_request(struct mddev *mddev, struct bio *bio)
: sector_div(sector, chunk_sects));

if (sectors < bio_sectors(bio)) {
- struct bio *split = bio_split(bio, sectors, GFP_NOIO,
+ bio = bio_submit_split_bioset(bio, sectors,
&mddev->bio_set);
-
- if (IS_ERR(split)) {
- bio->bi_status = errno_to_blk_status(PTR_ERR(split));
- bio_endio(bio);
+ if (!bio)
return true;
- }
-
- bio_chain(split, bio);
- trace_block_split(split, bio->bi_iter.bi_sector);
- raid0_map_submit_bio(mddev, bio);
- bio = split;
}

raid0_map_submit_bio(mddev, bio);
--
2.39.2