From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932260AbYEUHvj (ORCPT ); Wed, 21 May 2008 03:51:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757432AbYEUHv3 (ORCPT ); Wed, 21 May 2008 03:51:29 -0400 Received: from mta23.gyao.ne.jp ([125.63.38.249]:29263 "EHLO mx.gate01.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755590AbYEUHv2 (ORCPT ); Wed, 21 May 2008 03:51:28 -0400 Date: Wed, 21 May 2008 16:49:50 +0900 From: Paul Mundt To: Uwe Kleine-K?nig Cc: Magnus Damm , "Hans J. Koch" , linux-kernel@vger.kernel.org, gregkh@suse.de, linux-sh@vger.kernel.org Subject: Re: [PATCH 00/03][RFC] Reusable UIO Platform Driver Message-ID: <20080521074950.GA27310@linux-sh.org> Mail-Followup-To: Paul Mundt , Uwe Kleine-K?nig , Magnus Damm , "Hans J. Koch" , linux-kernel@vger.kernel.org, gregkh@suse.de, linux-sh@vger.kernel.org References: <20080520105132.1474.73941.sendpatchset@rx1.opensource.se> <20080520210713.GE3220@local> <20080521064938.GA11580@digi.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080521064938.GA11580@digi.com> User-Agent: Mutt/1.5.13 (2006-08-11) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 21, 2008 at 08:49:38AM +0200, Uwe Kleine-K?nig wrote: > Magnus Damm wrote: > > Extending uio_pdrv driver with a chunk of physically > > contiguous memory isn't a big deal though. > I wonder how you use that memory. Isn't it just some kind of shared > memory? If so, why not use normal shared memory? Do you really need > that? > Physically contiguous memory is a real requirement, especially for DMA. I'm not sure what's confusing about that?