From patchwork Thu Mar 30 10:43:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Thumshirn X-Patchwork-Id: 13193886 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 74E94C6FD1D for ; Thu, 30 Mar 2023 10:46:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231338AbjC3KqM (ORCPT ); Thu, 30 Mar 2023 06:46:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230321AbjC3Kpb (ORCPT ); Thu, 30 Mar 2023 06:45:31 -0400 Received: from esa2.hgst.iphmx.com (esa2.hgst.iphmx.com [68.232.143.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 35D397A8F; Thu, 30 Mar 2023 03:45:03 -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=1680173103; x=1711709103; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=r2Sf5mUt9HArXYNHtNNZG9NyfVeVIuPp2J4v5VCyro0=; b=pNKHTlKdjtAr66z8itc+R2bSBm/dF236chhGC6KgQICGMN964S5dQg8y XGqjnwD4F1KOeJ/zZBApvVIi73fEiDI9Xb8S3FYjy2P2tHppD22RKd4KF 15ioZk1WQSjzIEI7ww9e/opuNTObiSIWhuhLkpzOMwAYv8MV3f0cH85Dr R4rOS4IdOBCZyd9rLQomdpJRKV9tEazflzcFjf5yDAKI11ZO+VIjRIFgh 2Ljag3Ksj75Oz4eQIyEXWycCCGCk3kUbi7KPQUBlr52c+C5T8O7LdmDy9 Ts75ghdbLjSb3Bpl++mg2SfEGtrzXfEHtckyM06GRufUeaQQUzXQ4CFxg w==; X-IronPort-AV: E=Sophos;i="5.98,303,1673884800"; d="scan'208";a="331317841" 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 Mar 2023 18:44:26 +0800 IronPort-SDR: gLp0YoUfK+2189GRSg+8eK4AKUvglaignSnQSZWY5IEpxibvclkwRozVxi58f/jWIgXAraY5+J 7MAPFoJZ02cCwgiFhixeSJcDAHNTUFri4sRSYS9SdC28/gxSeTqj4xqhAcoosOx9QZVDzznoab AAUwtej3vr1mJA7gpD6ETz3DnV+/YBbMQTfHKyMGk5tF2Wi4cE8fRLmnBvd8/7wphN4JwRVskk GP2P6K1ST4PgIMRr2VrHC5cuFaFvn84thYWpI6M1GnIoncouPWaRPgpYzW5tF/mMtWVSx741Y4 7Zc= Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 30 Mar 2023 03:00:34 -0700 IronPort-SDR: Rnq9MYYdPgA09fnMFGRGvOdylFjRCrkzOVUrlWYy+L3Pme/NCk8sA6Zn7WCywdDLeWt/7Id+So 1032rM9LOkm6qL/hQgb+OsbJJwqKy6GZX5osAi0JcBf/+HCsJ3q7zLHVPXdvUb7yKaauSdhmYJ UDmdNwRTrKFtqsgT9GXLB7RhMWPPebX288EPBWtvMGFgihtyj6p7/rQAmgavpLeyucAJfIzx2x S6vPkaGyF+tI9E7e6BtHitbJy6rXVY95zbtc7Z9n0bymNi2mvwGRpwXi+6ApwH7c67oPbylcoo uXQ= WDCIronportException: Internal Received: from unknown (HELO redsun91.ssa.fujisawa.hgst.com) ([10.149.66.72]) by uls-op-cesaip01.wdc.com with ESMTP; 30 Mar 2023 03:44:24 -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 , David Sterba , linux-btrfs@vger.kernel.org, Johannes Thumshirn , Damien Le Moal Subject: [PATCH v2 07/19] md: raid5: use __bio_add_page to add single page to new bio Date: Thu, 30 Mar 2023 03:43:49 -0700 Message-Id: <29a2488aa641319199c597d1dc1151c700e32430.1680172791.git.johannes.thumshirn@wdc.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org 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);