diff mbox series

[12/19] zonefs: use __bio_add_page for adding single page to bio

Message ID ef742ee32fd0623008114e929d9a3e688fd721f7.1680108414.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 zonefs superblock reading 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>
---
 fs/zonefs/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Damien Le Moal March 29, 2023, 11:35 p.m. UTC | #1 
On 3/30/23 02:05, Johannes Thumshirn wrote:
> The zonefs superblock reading 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>

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

Patch

diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c
index 23b8b299c64e..9350221abfc5 100644
--- a/fs/zonefs/super.c
+++ b/fs/zonefs/super.c
@@ -1128,7 +1128,7 @@  static int zonefs_read_super(struct super_block *sb)
 
 	bio_init(&bio, sb->s_bdev, &bio_vec, 1, REQ_OP_READ);
 	bio.bi_iter.bi_sector = 0;
-	bio_add_page(&bio, page, PAGE_SIZE, 0);
+	__bio_add_page(&bio, page, PAGE_SIZE, 0);
 
 	ret = submit_bio_wait(&bio);
 	if (ret)