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md: simplify sync_page_io 

Use an on-stack bio and biovec for the single page synchronous I/O.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Song Liu <song@kernel.org>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Acked-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-01-26 15:52:42 +01:00 committed by Jens Axboe
parent a78f18da66
commit 32637385b8
1 changed files with 13 additions and 13 deletions
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26
drivers/md/md.c
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@ -1021,29 +1021,29 @@ int md_super_wait(struct mddev *mddev)
int sync_page_io(struct md_rdev *rdev, sector_t sector, int size,
struct page *page, int op, int op_flags, bool metadata_op)
{
struct bio *bio = md_bio_alloc_sync(rdev->mddev);
int ret;
struct bio bio;
struct bio_vec bvec;
bio_init(&bio, &bvec, 1);
if (metadata_op && rdev->meta_bdev)
bio_set_dev(bio, rdev->meta_bdev);
bio_set_dev(&bio, rdev->meta_bdev);
else
bio_set_dev(bio, rdev->bdev);
bio_set_op_attrs(bio, op, op_flags);
bio_set_dev(&bio, rdev->bdev);
bio.bi_opf = op | op_flags;
if (metadata_op)
bio->bi_iter.bi_sector = sector + rdev->sb_start;
bio.bi_iter.bi_sector = sector + rdev->sb_start;
else if (rdev->mddev->reshape_position != MaxSector &&
(rdev->mddev->reshape_backwards ==
(sector >= rdev->mddev->reshape_position)))
bio->bi_iter.bi_sector = sector + rdev->new_data_offset;
bio.bi_iter.bi_sector = sector + rdev->new_data_offset;
else
bio->bi_iter.bi_sector = sector + rdev->data_offset;
bio_add_page(bio, page, size, 0);
bio.bi_iter.bi_sector = sector + rdev->data_offset;
bio_add_page(&bio, page, size, 0);
submit_bio_wait(bio);
submit_bio_wait(&bio);
ret = !bio->bi_status;
bio_put(bio);
return ret;
return !bio.bi_status;
}
EXPORT_SYMBOL_GPL(sync_page_io);