[v6,14/20] md: raid1: use __bio_add_page for adding single page to bio

Commit Message

Johannes Thumshirn May 30, 2023, 3:49 p.m. UTC

The sync request code uses bio_add_page() to add a page to a newly created bio.
bio_add_page() can fail, but the return value is never checked.

Use __bio_add_page() as adding a single page to a newly created bio is
guaranteed to succeed.

This brings us a step closer to marking bio_add_page() as __must_check.

Reviewed-by: Damien Le Moal <[e-mail]>
Acked-by: Song Liu <[e-mail]>
Signed-off-by: Johannes Thumshirn <[e-mail]>
---
 drivers/md/raid1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Christoph Hellwig May 31, 2023, 4:23 a.m. UTC | #1

Looks good:

Reviewed-by: Christoph Hellwig <[e-mail]>

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Patch

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 8283ef177f6c..ff89839455ec 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2917,7 +2917,7 @@  static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
 				 * won't fail because the vec table is big
 				 * enough to hold all these pages
 				 */
-				bio_add_page(bio, page, len, 0);
+				__bio_add_page(bio, page, len, 0);
 			}
 		}
 		nr_sectors += len>>9;