[PATCH for-6.18/block 11/16] md/raid5: convert to use bio_submit_split_bioset()

Yu Kuai
2025-09-05T07:16:02Z

From: Yu Kuai <yukuai3@huawei.com>

Unify bio split code, prepare to fix reordered split IO.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
---
drivers/md/raid5.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 0fb838879844..3c9825ad3f07 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5468,7 +5468,6 @@ static int raid5_read_one_chunk(struct mddev *mddev, struct bio *raid_bio)

static struct bio *chunk_aligned_read(struct mddev *mddev, struct bio *raid_bio)
{
- struct bio *split;
sector_t sector = raid_bio->bi_iter.bi_sector;
unsigned chunk_sects = mddev->chunk_sectors;
unsigned sectors = chunk_sects - (sector & (chunk_sects-1));
@@ -5476,11 +5475,10 @@ static struct bio *chunk_aligned_read(struct mddev *mddev, struct bio *raid_bio)
if (sectors < bio_sectors(raid_bio)) {
struct r5conf *conf = mddev->private;

- split = bio_split(raid_bio, sectors, GFP_NOIO, &conf->bio_split);
- bio_chain(split, raid_bio);
- trace_block_split(split, raid_bio->bi_iter.bi_sector);
- submit_bio_noacct(raid_bio);
- raid_bio = split;
+ raid_bio = bio_submit_split_bioset(raid_bio, sectors,
+ &conf->bio_split);
+ if (!raid_bio)
+ return NULL;
}

if (!raid5_read_one_chunk(mddev, raid_bio))
--
2.39.2