Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266544AbUFVD2h (ORCPT ); Mon, 21 Jun 2004 23:28:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266545AbUFVD2e (ORCPT ); Mon, 21 Jun 2004 23:28:34 -0400 Received: from fw.osdl.org ([65.172.181.6]:29850 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S266544AbUFVD2d (ORCPT ); Mon, 21 Jun 2004 23:28:33 -0400 Date: Mon, 21 Jun 2004 20:26:39 -0700 (PDT) From: Linus Torvalds To: Jeff Garzik cc: Russell King , Takashi Iwai , Matt Porter , Jamey Hicks , Ian Molton , linux-kernel@vger.kernel.org, greg@kroah.com, tony@atomide.com, david-b@pacbell.net, joshua@joshuawise.com Subject: Re: DMA API issues In-Reply-To: Message-ID: References: <20040618175902.778e616a.spyro@f2s.com> <20040618110721.B3851@home.com> <40D3356E.8040800@hp.com> <20040618122112.D3851@home.com> <20040618204322.C17516@flint.arm.linux.org.uk> <20040622000838.B7802@flint.arm.linux.org.uk> <40D7941F.3020909@pobox.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 877 Lines: 21 On Mon, 21 Jun 2004, Linus Torvalds wrote: > > The argument at some point was that some architectures may not even _have_ > a "struct page" for DMA memory, since it's not "normal" memory (ie "slow > memory" on m68k). However, I thought we all agreed that such a "struct > page" could be furnished if that architecture wants so support mmap'ing. .. which is not to say that we shouldn't have a "pci_mmap_pages()" thing _too_. Pretty clearly the easiest interface often is to just map the pages at mmap() time, and then we should just have a helper function to do that. I thought we did one already, but hey, maybe not. Linus - 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/