diff mbox series

[v2,10/19] jfs: logmgr: use __bio_add_page to add single page to bio

Message ID 820f11140138c2deb4a649014556aef27474c13b.1680172791.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 30, 2023, 10:43 a.m. UTC 
The JFS IO 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>
---
 fs/jfs/jfs_logmgr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Dave Kleikamp March 30, 2023, 4:50 p.m. UTC | #1 
On 3/30/23 5:43AM, Johannes Thumshirn wrote:
> The JFS IO 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>

Acked-by: Dave Kleikamp <dave.kleikamp@oracle.com>

> ---
>   fs/jfs/jfs_logmgr.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
> index 695415cbfe98..15c645827dec 100644
> --- a/fs/jfs/jfs_logmgr.c
> +++ b/fs/jfs/jfs_logmgr.c
> @@ -1974,7 +1974,7 @@ static int lbmRead(struct jfs_log * log, int pn, struct lbuf ** bpp)
>   
>   	bio = bio_alloc(log->bdev, 1, REQ_OP_READ, GFP_NOFS);
>   	bio->bi_iter.bi_sector = bp->l_blkno << (log->l2bsize - 9);
> -	bio_add_page(bio, bp->l_page, LOGPSIZE, bp->l_offset);
> +	__bio_add_page(bio, bp->l_page, LOGPSIZE, bp->l_offset);
>   	BUG_ON(bio->bi_iter.bi_size != LOGPSIZE);
>   
>   	bio->bi_end_io = lbmIODone;
> @@ -2115,7 +2115,7 @@ static void lbmStartIO(struct lbuf * bp)
>   
>   	bio = bio_alloc(log->bdev, 1, REQ_OP_WRITE | REQ_SYNC, GFP_NOFS);
>   	bio->bi_iter.bi_sector = bp->l_blkno << (log->l2bsize - 9);
> -	bio_add_page(bio, bp->l_page, LOGPSIZE, bp->l_offset);
> +	__bio_add_page(bio, bp->l_page, LOGPSIZE, bp->l_offset);
>   	BUG_ON(bio->bi_iter.bi_size != LOGPSIZE);
>   
>   	bio->bi_end_io = lbmIODone;
diff mbox series

Patch

diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index 695415cbfe98..15c645827dec 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -1974,7 +1974,7 @@  static int lbmRead(struct jfs_log * log, int pn, struct lbuf ** bpp)
 
 	bio = bio_alloc(log->bdev, 1, REQ_OP_READ, GFP_NOFS);
 	bio->bi_iter.bi_sector = bp->l_blkno << (log->l2bsize - 9);
-	bio_add_page(bio, bp->l_page, LOGPSIZE, bp->l_offset);
+	__bio_add_page(bio, bp->l_page, LOGPSIZE, bp->l_offset);
 	BUG_ON(bio->bi_iter.bi_size != LOGPSIZE);
 
 	bio->bi_end_io = lbmIODone;
@@ -2115,7 +2115,7 @@  static void lbmStartIO(struct lbuf * bp)
 
 	bio = bio_alloc(log->bdev, 1, REQ_OP_WRITE | REQ_SYNC, GFP_NOFS);
 	bio->bi_iter.bi_sector = bp->l_blkno << (log->l2bsize - 9);
-	bio_add_page(bio, bp->l_page, LOGPSIZE, bp->l_offset);
+	__bio_add_page(bio, bp->l_page, LOGPSIZE, bp->l_offset);
 	BUG_ON(bio->bi_iter.bi_size != LOGPSIZE);
 
 	bio->bi_end_io = lbmIODone;