Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762953AbZDAMDn (ORCPT ); Wed, 1 Apr 2009 08:03:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755959AbZDAMDe (ORCPT ); Wed, 1 Apr 2009 08:03:34 -0400 Received: from hera.kernel.org ([140.211.167.34]:55604 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754302AbZDAMDd (ORCPT ); Wed, 1 Apr 2009 08:03:33 -0400 Message-ID: <49D3580B.8040109@kernel.org> Date: Wed, 01 Apr 2009 21:03:23 +0900 From: Tejun Heo User-Agent: Thunderbird 2.0.0.19 (X11/20081227) MIME-Version: 1.0 To: FUJITA Tomonori CC: axboe@kernel.dk, bharrosh@panasas.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH 7/8] blk-map: let blk_rq_map_user_iov() support null mapping References: <1238583884-13517-1-git-send-email-tj@kernel.org> <1238583884-13517-8-git-send-email-tj@kernel.org> <20090401205232C.fujita.tomonori@lab.ntt.co.jp> In-Reply-To: <20090401205232C.fujita.tomonori@lab.ntt.co.jp> X-Enigmail-Version: 0.95.7 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.0 (hera.kernel.org [127.0.0.1]); Wed, 01 Apr 2009 12:03:26 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 678 Lines: 21 FUJITA Tomonori wrote: > On Wed, 1 Apr 2009 20:04:43 +0900 > Tejun Heo wrote: > >> Impact: API expansion >> >> Till now, only blk_rq_map() supported null mapping. Add null mapping >> support to blk_rq_map_user_iov() by moving BIO_NULL_MAPPED setting to >> bio_copy_user_iov(). > > Why does blk_rq_map_user_iov() need to support the null mapping? Because the next patch makes blk_rq_map_user() use it. -- tejun -- 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/