From patchwork Tue May 30 15:49:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Thumshirn X-Patchwork-Id: 13260593 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A2F9C7EE31 for ; Tue, 30 May 2023 15:50:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232566AbjE3PuD (ORCPT ); Tue, 30 May 2023 11:50:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39132 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232531AbjE3Pto (ORCPT ); Tue, 30 May 2023 11:49:44 -0400 Received: from esa4.hgst.iphmx.com (esa4.hgst.iphmx.com [216.71.154.42]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 525F3F1; Tue, 30 May 2023 08:49:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1685461782; x=1716997782; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=asDmkxFBDABNDNnwDePSoyQARa0UoC2pBVbkyHt1eyc=; b=S9udaRYncrp56ozvBX/C6nYCqgh/jxrIsukVkVOlfEFOY0eGfUwQwG3N 2jbsrK8ZjArpyF9oz6krmxeHEjWHB/5XATKvM8Z3gmNX/qG5zAA0bpZHl lowffwyF/V1pG08obImxobY4K7k8n+t4txtxCumsj5IcGXz1+Azxi6SCM j45r8GVqGAPLiCory9y/xKNwVDCkqlK4oi/6Qo7dJ/baV2LkxZIASADHE UySLItJFvsxXpqrDQxt4KvhTTIa5vOAQvagFQtZZFlynMKezwrXxbx8c7 hpcNF61V0ymP74BaV8k4VHbgnryhuYI9Y6mpXg0H3ENFzfDx4o0APVe7/ Q==; X-IronPort-AV: E=Sophos;i="6.00,204,1681142400"; d="scan'208";a="230129750" Received: from h199-255-45-14.hgst.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 30 May 2023 23:49:41 +0800 IronPort-SDR: VRr3yQD3a3m9yEDRqdZ9CsEJT7PrpNl+UJQGzNKqoYlJYt2vMfr6ajUWCG5Tc1GaZCB+/g3Egn 8gQdHUjw6I9Pb3MMzWpyU4k2Emyys7RqmGXpkYY81JGKHdThupDgxF2W2rSg0w5tCJX7gGSuh4 MVa08/klxsJm9aitPIDjxNsiZ3beWRovaMz+IEqk5Z0t6zEYxf/+T0+gTDGq1VrxzA1Eqjsat2 al3xQPapCAPPKTuNFTsEUpyGkxKBCNDT4ihda1vP135j+vYYWJb3DrJCZenh2v679CfU7qX9M7 dZY= Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 30 May 2023 08:04:35 -0700 IronPort-SDR: flqRBN6t8oeSRa1BabMxnUCvrp7PztzsM6fP6YmtGqWahobry6jFcPjHqu76BmTmRg0k7xB+eW Xd41xDIbR1903c6oA+KNiyFakHUZmxnJUerK8kgF9kwCVwoChx0oBjxovMtZJ/BUIUTKUH9A2r 71Gjv2BTIfgq1jrGmK0RWrNe0WL9Ca0Hz/IorQC319U3yD+iig7YZY1mUOiG90XjQrt9L7sEd2 guJGoE6VxoZaYn17klSHxaUFROzgECTIVBStNd3SnsVgan18w3VkwfB17pJewsQNiwzdzvk0B0 ZGE= WDCIronportException: Internal Received: from unknown (HELO redsun91.ssa.fujisawa.hgst.com) ([10.149.66.6]) by uls-op-cesaip02.wdc.com with ESMTP; 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 Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org 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 Reviewed-by: Gou Hao Reviewed-by: Christoph Hellwig --- 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;