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30 May 2023 08:49:38 -0700 From: Johannes Thumshirn To: Jens Axboe Cc: Christoph Hellwig , Hannes Reinecke , Chaitanya Kulkarni , Damien Le Moal , Ming Lei , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, dm-devel@redhat.com, Song Liu , linux-raid@vger.kernel.org, Mike Snitzer , Matthew Wilcox , Dave Kleikamp , jfs-discussion@lists.sourceforge.net, cluster-devel@redhat.com, Bob Peterson , Andreas Gruenbacher , Mikulas Patocka , gouhao@uniontech.com, Johannes Thumshirn , Damien Le Moal Subject: [PATCH v6 04/20] fs: buffer: use __bio_add_page to add single page to bio Date: Tue, 30 May 2023 08:49:07 -0700 Message-Id: X-Mailer: git-send-email 2.40.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: D923C160018 X-Stat-Signature: gizfhrbyyirdqdgt54qr39oqkfi9cke1 X-Rspam-User: X-HE-Tag: 1685461782-776563 X-HE-Meta: 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 9PLj98Bz uH6b415RCvmR69RPlTAY9HWcS+OEJJmVYTfAat5StIrZjg0Xxx49DqAy3DxcI2OAR9tsB9UifU3GYESKoqtKpTVoWik131jmmH/uml6nSa59LoXT08Nr4J9fdPx/ReajhYi++IpgzxyVwCRrVo/8Wwigms238kvxtxTf0flGdPIA5BYPuEdhBJv8VZ6XwrQ2GNixqMuYbWEiZx4zgfpt4Ys6sk+GqftDBlcg3a/PVRyrjLvh9XDY8gntRyadrGw0ifs6PQAxAgl+EVdJbAUyn3Rc+7vvcKJ4eOz3ZfBSvVIjv4f6Xu/sgQ0/uwPf/Zksg8n7IFBhKfwwaCVY5kDx5qC5OX8C94lveqK70uonJcgUIm3HQ2h9aDAa4ONYHNsmOQ7ytnFSqamHKc9A= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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: Damien Le Moal Signed-off-by: Johannes Thumshirn --- fs/buffer.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index a7fc561758b1..63da30ce946a 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; -- 2.40.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id D9239C77B73 for ; Wed, 31 May 2023 11:38:23 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 7ABA76B0078; 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31 May 2023 04:38:16 -0700 From: Johannes Thumshirn To: Jens Axboe Cc: Christoph Hellwig , Hannes Reinecke , Chaitanya Kulkarni , Damien Le Moal , Ming Lei , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, dm-devel@redhat.com, Song Liu , linux-raid@vger.kernel.org, Mike Snitzer , Matthew Wilcox , Dave Kleikamp , jfs-discussion@lists.sourceforge.net, cluster-devel@redhat.com, Bob Peterson , Andreas Gruenbacher , Mikulas Patocka , gouha7@uniontech.com, Johannes Thumshirn , Damien Le Moal Subject: [PATCH v6 04/20] fs: buffer: use __bio_add_page to add single page to bio Date: Wed, 31 May 2023 04:37:46 -0700 Message-ID: X-Mailer: git-send-email 2.40.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: E5D1E80010 X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: 73fahk8onfrt14u3s7jmx4utpn4do64y X-HE-Tag: 1685533100-154281 X-HE-Meta: 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 7rLJ379Y 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Message-ID: <20230531113746.SYNqpwmfl2T5hhr87Cv_FlyjpUZCxws5kcqn5Qy9aPg@z> 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: Damien Le Moal Signed-off-by: Johannes Thumshirn --- fs/buffer.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/fs/buffer.c b/fs/buffer.c index a7fc561758b1..63da30ce946a 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; -- 2.40.1