diff mbox series

[06/19] md: raid5-log: use __bio_add_page to add single page

Message ID 492cbaf4225065838d25e04f8488528e50a52e3e.1680108414.git.johannes.thumshirn@wdc.com (mailing list archive)
State New
Headers show
Series bio: check return values of bio_add_page | expand

Commit Message

Johannes Thumshirn March 29, 2023, 5:05 p.m. UTC 
The raid5 log metadata submission 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.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
 drivers/md/raid5-cache.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Damien Le Moal March 29, 2023, 11:32 p.m. UTC | #1 
On 3/30/23 02:05, Johannes Thumshirn wrote:
> The raid5 log metadata submission 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.
> 
> Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>

Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
diff mbox series

Patch

diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c
index 46182b955aef..852b265c5db4 100644
--- a/drivers/md/raid5-cache.c
+++ b/drivers/md/raid5-cache.c
@@ -792,7 +792,7 @@  static struct r5l_io_unit *r5l_new_meta(struct r5l_log *log)
 	io->current_bio = r5l_bio_alloc(log);
 	io->current_bio->bi_end_io = r5l_log_endio;
 	io->current_bio->bi_private = io;
-	bio_add_page(io->current_bio, io->meta_page, PAGE_SIZE, 0);
+	__bio_add_page(io->current_bio, io->meta_page, PAGE_SIZE, 0);
 
 	r5_reserve_log_entry(log, io);