From patchwork Thu Jun 13 14:59:52 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chaitanya Kulkarni X-Patchwork-Id: 10991971 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7B60714BB for ; Thu, 13 Jun 2019 15:00:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 69BE9205A8 for ; Thu, 13 Jun 2019 15:00:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 5DDDE208C2; Thu, 13 Jun 2019 15:00:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0FE19205A4 for ; Thu, 13 Jun 2019 15:00:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732907AbfFMPAb (ORCPT ); Thu, 13 Jun 2019 11:00:31 -0400 Received: from esa4.hgst.iphmx.com ([216.71.154.42]:28031 "EHLO esa4.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732901AbfFMPAa (ORCPT ); Thu, 13 Jun 2019 11:00:30 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1560438030; x=1591974030; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=dPhUA1+cc13a48v9hC5jFZOu/fNuKpP1r0BY+977toE=; b=TtC2JPv89mwKfznCzrNa6iXc0sfMHC5RgOEq8MHmjdBH6cf9giFS4x0A h2kqI194vbbUK3nNvKfLiWdI8cyMo8S3ghcwbBoRZeMPnweTNk/je00+L EjIOaLUbIkmVh8YGFKbgbuQ/87w2Gph9qBHoxkoJLobE2ooFS7XxRjpMa HWlYSOgzR5fcM8uR5PfZqjb0Q70/fkvMduW10Hb9H09GjO9OW1/88qV1B nEeYNu5G/b+Ouw4WLWQpEcdEY3IfzlXiGVh+t1zr9f5hOLKvQEiGcQiYH hQmQY8KMcdcSrlixOz6LCBSkHtgcluAsh5O/Ri5wCeJwEZAzFcM1aIBJG A==; X-IronPort-AV: E=Sophos;i="5.63,369,1557158400"; d="scan'208";a="110477927" 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; 13 Jun 2019 23:00:30 +0800 IronPort-SDR: 5FoQPSooDdZfaEzgVHwrNyHKUERLDa8BbmKJySmBJyxmDfflSV9r5CNkQcJ4VtlHvBth0pk/kj rhGJwEbTh7YwnHkdjaZ/QnLGsYfvOIXyby5PhyHxAbomBzc1rRDYihmbyLbyzSO+pkRFQqqxwA 7CySiSSpgL3MPJibXNq060rlxLxUvl6YljMDghtd7a6n/H+AWLsgBcUZ24JFi4lGkPcDcYZIBp dwExuyCmBdYYyhwG/X8Q9iZs171r85/atnsPJkHaHQO/9krBt1X9M2PZeqcUTseyJQPNNiqkiY w4fzj3NXB5OPjdZxaXCJUjcn Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep01.wdc.com with ESMTP; 13 Jun 2019 08:00:13 -0700 IronPort-SDR: LMUwsamurQJ27M9W1XdZRzdaCX62e6fvBH48L5GtZmtaP5/Cfr7XkPolh0Ovj7TECZYOmHmCSe WaZKa3XZP+9Zqx4j+h/dW3Kh/UGLXfDzNsVgPFufk4rj59Wecn+VMK1SwGe0Mfdcvbd639u8xV tTejOOrYQXnXK7jyHMcURl1TEjTI7nDT+jWqifhYNMkbnLbjCOBZGHoQIgJuSgLfpmdS9sdo/+ RWeH0JkgKC6NgjsavVjQ/Js98NRhXPhA2vlDi/jR2E6Ag3J8WxewFyry/kjz48krJeV+b+qS0G uQg= Received: from cmercuryqemu.hgst.com ([10.202.65.32]) by uls-op-cesaip01.wdc.com with ESMTP; 13 Jun 2019 08:00:29 -0700 From: Chaitanya Kulkarni To: linux-block@vger.kernel.org Cc: colyli@suse.de, linux-bcache@vger.kernel.org, linux-scsi@vger.kernel.org, linux-btrace@vger.kernel.org, kent.overstreet@gmail.com, jaegeuk@kernel.org, damien.lemoal@wdc.com, Chaitanya Kulkarni Subject: [PATCH 5/8] bcache: update cached_dev_init() with helper Date: Thu, 13 Jun 2019 07:59:52 -0700 Message-Id: <20190613145955.4813-6-chaitanya.kulkarni@wdc.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190613145955.4813-1-chaitanya.kulkarni@wdc.com> References: <20190613145955.4813-1-chaitanya.kulkarni@wdc.com> MIME-Version: 1.0 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In the bcache when initializing the cached device we don't actually use any sort of locking when reading the number of sectors from the part. This patch updates the cached_dev_init() with newly introduced helper function to read the nr_sects from block device's hd_parts with the help if part_nr_sects_read() protected by appropriate locking. Signed-off-by: Chaitanya Kulkarni --- drivers/md/bcache/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 1b63ac876169..6a29ba89dae1 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1263,7 +1263,7 @@ static int cached_dev_init(struct cached_dev *dc, unsigned int block_size) q->limits.raid_partial_stripes_expensive; ret = bcache_device_init(&dc->disk, block_size, - dc->bdev->bd_part->nr_sects - dc->sb.data_offset); + bdev_nr_sects(dc->bdev) - dc->sb.data_offset); if (ret) return ret;