From patchwork Tue Jul 21 08:37:32 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongsheng Yang X-Patchwork-Id: 498067 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2001:1868:205::9]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id E29DC140D31 for ; Tue, 21 Jul 2015 18:45:22 +1000 (AEST) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZHT9W-0002xG-Aw; Tue, 21 Jul 2015 08:43:54 +0000 Received: from [59.151.112.132] (helo=heian.cn.fujitsu.com) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZHT9T-0002qt-Hs for linux-mtd@lists.infradead.org; Tue, 21 Jul 2015 08:43:52 +0000 X-IronPort-AV: E=Sophos;i="5.13,665,1427731200"; d="scan'208";a="98671190" Received: from unknown (HELO edo.cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 21 Jul 2015 16:47:10 +0800 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (localhost.localdomain [127.0.0.1]) by edo.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id t6L8fe7w004985; Tue, 21 Jul 2015 16:41:40 +0800 Received: from yds-PC.g08.fujitsu.local (10.167.226.66) by G08CNEXCHPEKD02.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.181.6; Tue, 21 Jul 2015 16:43:27 +0800 From: Dongsheng Yang To: , , Subject: [PATCH 01/25] fs: introduce a ->s_cdev field into struct super_block Date: Tue, 21 Jul 2015 16:37:32 +0800 Message-ID: <1437467876-22106-2-git-send-email-yangds.fnst@cn.fujitsu.com> X-Mailer: git-send-email 1.8.4.2 In-Reply-To: <1437467876-22106-1-git-send-email-yangds.fnst@cn.fujitsu.com> References: <1437467876-22106-1-git-send-email-yangds.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.66] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150721_014351_767080_0491339A X-CRM114-Status: UNSURE ( 8.53 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -1.1 (-) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-1.1 points) pts rule name description ---- ---------------------- -------------------------------------------------- -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] 0.8 RDNS_NONE Delivered to internal network by a host with no rDNS X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fsdevel@vger.kernel.org, Dongsheng Yang , linux-mtd@lists.infradead.org Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org There are some filesystems are running on char devs, such as ubifs. So we need a field in super_block to hold a reference to the char device. Signed-off-by: Dongsheng Yang --- include/linux/fs.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index 35ec87e..2f1d9499 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1284,6 +1284,7 @@ struct super_block { struct hlist_bl_head s_anon; /* anonymous dentries for (nfs) exporting */ struct list_head s_mounts; /* list of mounts; _not_ for fs use */ struct block_device *s_bdev; + struct cdev *s_cdev; struct backing_dev_info *s_bdi; struct mtd_info *s_mtd; struct hlist_node s_instances;