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[2620:137:e000::1:20]) by mx.google.com with ESMTP id io16-20020a17090312d000b0019ce74dd5c8si3739405plb.529.2023.03.14.19.08.04; Tue, 14 Mar 2023 19:08:23 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=huawei.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230122AbjCOBdC (ORCPT + 99 others); Tue, 14 Mar 2023 21:33:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43460 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230133AbjCOBcw (ORCPT ); Tue, 14 Mar 2023 21:32:52 -0400 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1CD293865D; Tue, 14 Mar 2023 18:32:19 -0700 (PDT) Received: from kwepemm600013.china.huawei.com (unknown [172.30.72.57]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4PbtD2607KzKmrn; Wed, 15 Mar 2023 09:32:02 +0800 (CST) Received: from huawei.com (10.175.127.227) by kwepemm600013.china.huawei.com (7.193.23.68) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.21; Wed, 15 Mar 2023 09:32:16 +0800 From: Zhihao Cheng To: , , , CC: , , , Subject: [PATCH v3 2/6] ext4: ext4_put_super: Remove redundant checking for 'sbi->s_journal_bdev' Date: Wed, 15 Mar 2023 09:31:24 +0800 Message-ID: <20230315013128.3911115-3-chengzhihao1@huawei.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230315013128.3911115-1-chengzhihao1@huawei.com> References: <20230315013128.3911115-1-chengzhihao1@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.127.227] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemm600013.china.huawei.com (7.193.23.68) X-CFilter-Loop: Reflected X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1760397731861938926?= X-GMAIL-MSGID: =?utf-8?q?1760397731861938926?= As discussed in [1], 'sbi->s_journal_bdev != sb->s_bdev' will always become true if sbi->s_journal_bdev exists. Filesystem block device and journal block device are both opened with 'FMODE_EXCL' mode, so these two devices can't be same one. Then we can remove the redundant checking 'sbi->s_journal_bdev != sb->s_bdev' if 'sbi->s_journal_bdev' exists. [1] https://lore.kernel.org/lkml/f86584f6-3877-ff18-47a1-2efaa12d18b2@huawei.com/ Signed-off-by: Zhihao Cheng Reviewed-by: Jan Kara --- fs/ext4/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 61511b7ba017..a22417d113ca 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1277,7 +1277,7 @@ static void ext4_put_super(struct super_block *sb) sync_blockdev(sb->s_bdev); invalidate_bdev(sb->s_bdev); - if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { + if (sbi->s_journal_bdev) { sync_blockdev(sbi->s_journal_bdev); ext4_blkdev_remove(sbi); }