From patchwork Tue May 2 10:19:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Thumshirn X-Patchwork-Id: 13228724 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 8F780C77B73 for ; Tue, 2 May 2023 10:22:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233958AbjEBKWu (ORCPT ); Tue, 2 May 2023 06:22:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59550 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233919AbjEBKVt (ORCPT ); Tue, 2 May 2023 06:21:49 -0400 Received: from esa5.hgst.iphmx.com (esa5.hgst.iphmx.com [216.71.153.144]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 45EBC5B89; Tue, 2 May 2023 03:21:27 -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=1683022887; x=1714558887; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=gvTmlyJDrtB3jz8iBa+x9pcB74OLTnG9vUDo5GkRHDI=; b=qH6Zt3CjDkhtvS8ZR9ANIjmSDl75HACGQRamghUShiGeks9cCHkG4nD+ wOa+GXeQ9UuuZzs4OXyPv7uMtoGlQKHQTbzCReoMzklLnfF4KpF818E58 7KF4FUxrytDoQIkDnfat1Fz+312alzaubdm4pyFG9pmWEhjKwf1cptzES zavqPzFNnNuT2+OlcVpK9GoTH2Y90tUBYWkqddZziln4RclydCsSPmkXS biM12Xy6zMip3q4B9qwI4uwEaZY7suyVXhTNy50SX1+k/PyAwEPkIFhE4 g4qvEQEdz3dBZtFFqtZJpR7R7Qt9F6aOAsKDb01mDipljbX2eKTtUvGPn A==; X-IronPort-AV: E=Sophos;i="5.99,243,1677513600"; d="scan'208";a="229597924" Received: from uls-op-cesaip02.wdc.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 02 May 2023 18:21:27 +0800 IronPort-SDR: GP3+8ePZ5M2R2YlmrdW5lIa2ySPUA26egLDWYMLOMkuHSkt7+n3nCbC4niJUrOTygkVMuD+iTZ /F641Dj/pUWrD5Cu8mHq2b7r0GDwRBtJE8bo1Z5Fej9dyKl/4BH6Su0rUftEDmtbXQDm/OCHLa zdwjwq/rKVFfx7W8aT5IJgYXnsKuAMqDrfhNiYBkun534BJ51g5N4YHw0ZW8tOcoqWHDNglne8 FbcMeOVw/HxM+sjeFOQrHGAI5KqWDTRRKvqbvUdtSRrS4crdP1EOXLluAmXZrMStNPzMY2SvUQ /4o= Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep02.wdc.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 02 May 2023 02:31:14 -0700 IronPort-SDR: wp2VCzSGIEBx+d279yxevBn1+XI3VuKvqj8oLKNceK55K/eOSJmgxWhB2EK2yL9r249YKUNO4M bGeHb0y1gSCYoZWdb1piBrcelHDZIIRDff/B8f6uw2wt+EBKzLtgHpS/if9aysTLwKYYR4CmyK Ut3+BZdj8uHy5barmhyvli41TJGJFb4YMPGI659Z9H7QJ+LTZHxcRB0MAMkzGM2yCWWsIECayM KNaUJNela6Ul6p5EBpXHf43F6gec7o7gG4gWdqANgAE+DXYIfyjuwn3+4ZYonG6bdrIN5mcSTK NIA= WDCIronportException: Internal Received: from myd008205.ad.shared (HELO localhost.localdomain) ([10.225.1.100]) by uls-op-cesaip02.wdc.com with ESMTP; 02 May 2023 03:21:23 -0700 From: Johannes Thumshirn To: "axboe @ kernel . dk" Cc: agruenba@redhat.com, cluster-devel@redhat.com, damien.lemoal@wdc.com, dm-devel@redhat.com, hare@suse.de, hch@lst.de, jfs-discussion@lists.sourceforge.net, kch@nvidia.com, linux-block@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, Johannes Thumshirn , Damien Le Moal , Sergey Senozhatsky Subject: [PATCH v5 11/20] zram: use __bio_add_page for adding single page to bio Date: Tue, 2 May 2023 12:19:25 +0200 Message-Id: <20230502101934.24901-12-johannes.thumshirn@wdc.com> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230502101934.24901-1-johannes.thumshirn@wdc.com> References: <20230502101934.24901-1-johannes.thumshirn@wdc.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org The zram writeback 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 Reviewed-by: Sergey Senozhatsky Signed-off-by: Johannes Thumshirn --- drivers/block/zram/zram_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index a84c4268257a..4b9ca6d41b92 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -700,7 +700,7 @@ static ssize_t writeback_store(struct device *dev, bio_init(&bio, zram->bdev, &bio_vec, 1, REQ_OP_WRITE | REQ_SYNC); bio.bi_iter.bi_sector = blk_idx * (PAGE_SIZE >> 9); - bio_add_page(&bio, page, PAGE_SIZE, 0); + __bio_add_page(&bio, page, PAGE_SIZE, 0); /* * XXX: A single page IO would be inefficient for write