Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762374AbXHaWme (ORCPT ); Fri, 31 Aug 2007 18:42:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754980AbXHaWmY (ORCPT ); Fri, 31 Aug 2007 18:42:24 -0400 Received: from mx1.redhat.com ([66.187.233.31]:51529 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752022AbXHaWmX (ORCPT ); Fri, 31 Aug 2007 18:42:23 -0400 Date: Fri, 31 Aug 2007 18:41:46 -0400 (EDT) Message-Id: <20070831.184146.18307878.k-ueda@ct.jp.nec.com> To: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-ide@vger.kernel.org, jens.axboe@oracle.com, mike.miller@hp.com, grant.likely@secretlab.ca Cc: dm-devel@redhat.com, j-nomura@ce.jp.nec.com, k-ueda@ct.jp.nec.com Subject: [PATCH 2/7] blk_end_request: add blk_rq_size() macros From: Kiyoshi Ueda X-Mailer: Mew version 3.3 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1599 Lines: 34 This patch adds macros to get the size of request in bytes. They are useful because blk_end_request() takes bytes as a completed I/O size instead of sectors. Signed-off-by: Kiyoshi Ueda Signed-off-by: Jun'ichi Nomura --- blkdev.h | 9 +++++++++ 1 files changed, 9 insertions(+) diff -rupN 01-blkendreq-interface/include/linux/blkdev.h 02-sect2byte-macro/include/linux/blkdev.h --- 01-blkendreq-interface/include/linux/blkdev.h 2007-08-23 17:22:50.000000000 -0400 +++ 02-sect2byte-macro/include/linux/blkdev.h 2007-08-23 17:25:59.000000000 -0400 @@ -737,6 +737,15 @@ extern void end_request(struct request * extern void blk_complete_request(struct request *); /* + * blk_end_request() takes bytes instead of sectors as a complete size. + * blk_rq_size() returns the entire size left to complete in the request. + * blk_rq_cur_size() returns the size left to complete in the current segment. + */ +#define sect2byte(nr_sectors) ((nr_sectors) << 9) +#define blk_rq_size(rq) (sect2byte((rq)->hard_nr_sectors)) +#define blk_rq_cur_size(rq) (sect2byte((rq)->current_nr_sectors)) + +/* * end_that_request_first/chunk() takes an uptodate argument. we account * any value <= as an io error. 0 means -EIO for compatability reasons, * any other < 0 value is the direct error type. An uptodate value of - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/