From 741af75d4027b1229fc6e62f4e3c4378dfe04897 Mon Sep 17 00:00:00 2001 From: Johannes Thumshirn Date: Wed, 31 May 2023 04:50:27 -0700 Subject: [PATCH] fs: buffer: use __bio_add_page to add single page to bio The buffer_head 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. Reviewed-by: Gou Hao Reviewed-by: Christoph Hellwig Reviewed-by: Damien Le Moal Signed-off-by: Johannes Thumshirn Link: https://lore.kernel.org/r/84ff2dcbe81b258a73ad900adb5266e208b61a4d.1685532726.git.johannes.thumshirn@wdc.com Signed-off-by: Jens Axboe --- fs/buffer.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index a7fc561758b1a..63da30ce946a4 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -2760,8 +2760,7 @@ static void submit_bh_wbc(blk_opf_t opf, struct buffer_head *bh, bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9); - bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh)); - BUG_ON(bio->bi_iter.bi_size != bh->b_size); + __bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh)); bio->bi_end_io = end_bio_bh_io_sync; bio->bi_private = bh; -- 2.47.2