From patchwork Thu Apr 20 10:04:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Thumshirn X-Patchwork-Id: 13218318 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 4CB03C77B78 for ; Thu, 20 Apr 2023 10:06:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234039AbjDTKGm (ORCPT ); Thu, 20 Apr 2023 06:06:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46970 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234530AbjDTKGL (ORCPT ); Thu, 20 Apr 2023 06:06:11 -0400 Received: from mail-wr1-f50.google.com (mail-wr1-f50.google.com [209.85.221.50]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5177F5248; Thu, 20 Apr 2023 03:06:00 -0700 (PDT) Received: by mail-wr1-f50.google.com with SMTP id ffacd0b85a97d-2fbb99cb297so417760f8f.1; Thu, 20 Apr 2023 03:06:00 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681985159; x=1684577159; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=F5xZASE6AX0FDAF9QaXMQYNUIt4BDoCJAIYtVfQg3gg=; b=lxk37erp0ZNKKr6UKOi8VqogOq3sM1+6I9J6z2BCwzmmPy0vsBzYyJYeGq9NXLY8LB Xc5lGBgq8GVYSKRMlxNeQq96dIfeXABZ0gPS3bUO2OowqdnR7WR0dRPd1kp8FREFlzOX BBiuwbM3byglPXXfZkMrIwtFZ0ef23T/ecIIEteC911DE3UD5vZTJKORL1EjuxWyMFnL AY6AuqukFrH7kDh2PJ673JSw3i2zjCnfkzueI/xF1CevMnXA7ORKly/r47peSO0Si9Un bLCUVAi2034lxjb8++qEuxP0+0cRBk8WLyfnt/I6IfQqr+YcomRlmoKS3at1x+Qslktj AIww== X-Gm-Message-State: AAQBX9cioLwUwMcDP5PbY74/hGlbecv+VzVuQGi/LL+GZCuUHa6exbEI nL9e74tn260uDIb52rzK8JA= X-Google-Smtp-Source: AKy350ZtHgDeegvxG35rcf9J1FTRXDJsZRNH6d7HbvfRC6w+FAYR7ZZW0+ZSIUUQqHYhj0zTMP2AFw== X-Received: by 2002:adf:ebc4:0:b0:2fe:c0ea:18ad with SMTP id v4-20020adfebc4000000b002fec0ea18admr814816wrn.47.1681985158713; Thu, 20 Apr 2023 03:05:58 -0700 (PDT) Received: from localhost.localdomain (aftr-62-216-205-208.dynamic.mnet-online.de. [62.216.205.208]) by smtp.googlemail.com with ESMTPSA id l11-20020a5d674b000000b0030276f42f08sm201410wrw.88.2023.04.20.03.05.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 Apr 2023 03:05:58 -0700 (PDT) From: Johannes Thumshirn To: axboe@kernel.dk Cc: johannes.thumshirn@wdc.com, agruenba@redhat.com, cluster-devel@redhat.com, damien.lemoal@wdc.com, dm-devel@redhat.com, dsterba@suse.com, hare@suse.de, hch@lst.de, jfs-discussion@lists.sourceforge.net, kch@nvidia.com, linux-block@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-raid@vger.kernel.org, ming.lei@redhat.com, rpeterso@redhat.com, shaggy@kernel.org, snitzer@kernel.org, song@kernel.org, willy@infradead.org, Damien Le Moal Subject: [PATCH v4 07/22] md: raid5: use __bio_add_page to add single page to new bio Date: Thu, 20 Apr 2023 12:04:46 +0200 Message-Id: <20230420100501.32981-8-jth@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230420100501.32981-1-jth@kernel.org> References: <20230420100501.32981-1-jth@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Johannes Thumshirn The raid5-ppl 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. For adding consecutive pages, the return is actually checked and a new bio is allocated if adding the page fails. 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 Acked-by: Song Liu --- drivers/md/raid5-ppl.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/md/raid5-ppl.c b/drivers/md/raid5-ppl.c index e495939bb3e0..eaea57aee602 100644 --- a/drivers/md/raid5-ppl.c +++ b/drivers/md/raid5-ppl.c @@ -465,7 +465,7 @@ static void ppl_submit_iounit(struct ppl_io_unit *io) bio->bi_end_io = ppl_log_endio; bio->bi_iter.bi_sector = log->next_io_sector; - bio_add_page(bio, io->header_page, PAGE_SIZE, 0); + __bio_add_page(bio, io->header_page, PAGE_SIZE, 0); pr_debug("%s: log->current_io_sector: %llu\n", __func__, (unsigned long long)log->next_io_sector); @@ -496,7 +496,7 @@ static void ppl_submit_iounit(struct ppl_io_unit *io) prev->bi_opf, GFP_NOIO, &ppl_conf->bs); bio->bi_iter.bi_sector = bio_end_sector(prev); - bio_add_page(bio, sh->ppl_page, PAGE_SIZE, 0); + __bio_add_page(bio, sh->ppl_page, PAGE_SIZE, 0); bio_chain(bio, prev); ppl_submit_iounit_bio(io, prev);