From patchwork Wed Aug 21 06:14:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chaitanya Kulkarni X-Patchwork-Id: 11105489 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1E9C11813 for ; Wed, 21 Aug 2019 06:14:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F13272339E for ; Wed, 21 Aug 2019 06:14:35 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=wdc.com header.i=@wdc.com header.b="MaMiwGfR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727817AbfHUGOf (ORCPT ); Wed, 21 Aug 2019 02:14:35 -0400 Received: from esa6.hgst.iphmx.com ([216.71.154.45]:34498 "EHLO esa6.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727766AbfHUGOf (ORCPT ); Wed, 21 Aug 2019 02:14:35 -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=1566368074; x=1597904074; h=from:to:cc:subject:date:message-id:in-reply-to: references; bh=YxWj03mIGVcVbYKOln1UBPzCaYS0qRuFrw+e6W6O8fU=; b=MaMiwGfRcNgMb7+ytBS3Va8PMKEOCH0BlzZE0NcmTMppBfMs2a4eL9Yt LlqUkKVBkbdNaoCydPT9PzeCKEg7W0HHsQdchztkdxCLGbO0zNddy+MHN rC4VzB3J0JOQnZmEzVY2CEZxpazoPaY1QQJjkimpfxqCbMHTFFAkHHeC0 tM8atciSbm2GmRE/y8rLcsbhLYdDHzZN7SN9TBNMQUd8788htt4hFGIY2 k6pBiHt2SR8SLc05p2kqdIifHyGTf6hOqQTQDpnsl13ys9O0QFjkoBc4M BdX+qJWkkPJcBIv7hGasdC1WM/BuQSoDmFbhxizu+c8hhiLHwW6vUsuW+ Q==; IronPort-SDR: CgKU5uQFZOtXSnflEOa9Wxs+RJ2H0l+YiQq04NIRRiPSANXRhk4mzH4dB/m3raj2w44GTjkm4P a/crukhRhFmiZcz8klbtG2imv91wSvGz+HJ3PKo51XZ17g+rRh1ClTO2EHTpt7Aaee6z70c45U bcq022hcHPMPXjDOKRC4Ng4SlgJ9N3Bpy3v4W5y3AzgI/hCo52nprmQPTilc/66Ky8DbaXQRDa GvXMqLUdeMNeEO/EIdCPghc7zsfqzSxYTOnlhDjorSvktcKnhLxHPtBTb/wFqWhM6NNF7pof0Q Kn8= X-IronPort-AV: E=Sophos;i="5.64,411,1559491200"; d="scan'208";a="117904641" Received: from h199-255-45-15.hgst.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 21 Aug 2019 14:14:32 +0800 IronPort-SDR: enE0E3BSbWZ0lvkP1xxRNohhL4LJHuEUalT42vk5hP124w4r4S3JRwtN3HrwfLSDL0Ftv8a6By xpv4wuPtxypizvxVauvlYHuhmbJbnUAQ2+tUppy+naNEKGyOo5ZJdCkJ2RHH+N8dMakO0b4oH8 K1q9Jbmc7aX5KRCcpR1ctYV6EUKHGM3PGGxWp4vIXvwwDFxZY0jRlpy4Dm2SwC8D9v4FcY+qGD x9Iz5yoJsSruk9FLMaPPScNpzYPEXrn7pwBibknNp1xOWPVzkEHOIM+iyfjM8aKaImOJjt0n3K 3vVqLFTPT5mD6ElPXOvL/fQe Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep02.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Aug 2019 23:11:54 -0700 IronPort-SDR: J1I/5bgiTFIAu8nNl9kv6CSGMFr4yg0TlUcqLzMJdDy8EZZg8n4rfy/XPfR/JjpgmOnfkVltBx ssjiOGwNssK5XXLGHSuoQGzY72APilAq4AuufFX7XHX3TUf6fMAFSvIG+S4BOIvcE8H6g4FFk4 w6w8aEGbtPr28z7XjcaeIOJwLHNeebOJOnfEd1HlWA5+RnjTkgiUj/gkJ7B08lWbk1QlQ2RUaA iYA9zikhwLYCTW/T6a0mIofhJVPKp5ODf79l+YclGUXbyljEgCoXjsbem9ACoYAnj3ly4+ysyD mtk= WDCIronportException: Internal Received: from cvenusqemu.hgst.com ([10.202.66.73]) by uls-op-cesaip01.wdc.com with ESMTP; 20 Aug 2019 23:14:32 -0700 From: Chaitanya Kulkarni To: linux-block@vger.kernel.org Cc: colyli@suse.de, linux-bcache@vger.kernel.org, linux-btrace@vger.kernel.org, xen-devel@lists.xenproject.org, kent.overstreet@gmail.com, yuchao0@huawei.com, jaegeuk@kernel.org, damien.lemoal@wdc.com, konrad.wilk@oracle.com, roger.pau@citrix.com, bvanassche@acm.org, linux-scsi@vger.kernel.org, Chaitanya Kulkarni Subject: [PATCH V5 1/9] block: add a helper function to read nr_setcs Date: Tue, 20 Aug 2019 23:14:15 -0700 Message-Id: <20190821061423.3408-2-chaitanya.kulkarni@wdc.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20190821061423.3408-1-chaitanya.kulkarni@wdc.com> References: <20190821061423.3408-1-chaitanya.kulkarni@wdc.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org This patch introduces helper function to read the number of sectors from struct block_device->bd_part member. For more details Please refer to the comment in the include/linux/genhd.h for part_nr_sects_read(). Reviewed-by: Minwoo Im Reviewed-by: Martin K. Petersen Signed-off-by: Chaitanya Kulkarni --- include/linux/blkdev.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 4798bb25f1ee..aa5801c8ff73 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1468,6 +1468,11 @@ static inline void put_dev_sector(Sector p) put_page(p.v); } +static inline sector_t bdev_nr_sects(struct block_device *bdev) +{ + return part_nr_sects_read(bdev->bd_part); +} + int kblockd_schedule_work(struct work_struct *work); int kblockd_schedule_work_on(int cpu, struct work_struct *work); int kblockd_mod_delayed_work_on(int cpu, struct delayed_work *dwork, unsigned long delay);