Re: [dm-devel] [PATCH 16/19] md: raid1: use __bio_add_page for adding single page to bio

2023-03-29 Thread Damien Le Moal
On 3/30/23 02:06, Johannes Thumshirn wrote:
> 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.
> 
> Signed-off-by: Johannes Thumshirn 

Reviewed-by: Damien Le Moal 

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Damien Le Moal
Western Digital Research

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[dm-devel] [PATCH 16/19] md: raid1: use __bio_add_page for adding single page to bio

2023-03-29 Thread Johannes Thumshirn
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.

Signed-off-by: Johannes Thumshirn 
---
 drivers/md/raid1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index bd7c339a84a1..c226d293992f 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2915,7 +2915,7 @@ 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;
-- 
2.39.2

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