Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 11 Jun 2002 11:57:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 11 Jun 2002 11:57:22 -0400 Received: from earth.ayrnetworks.com ([64.166.72.139]:40628 "EHLO ayrnetworks.com") by vger.kernel.org with ESMTP id ; Tue, 11 Jun 2002 11:57:22 -0400 Date: Tue, 11 Jun 2002 08:57:11 -0700 From: William Jhun To: "David S. Miller" Cc: oliver@neukum.name, roland@topspin.com, paulus@samba.org, linux-kernel@vger.kernel.org Subject: Re: PCI DMA to small buffers on cache-incoherent arch Message-ID: <20020611085711.A7520@ayrnetworks.com> In-Reply-To: <20020610.233850.60926092.davem@redhat.com> <200206110938.52090.oliver@neukum.name> <20020611.003625.05877183.davem@redhat.com> <20020611.004305.96601553.davem@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 11, 2002 at 12:43:05AM -0700, David S. Miller wrote: > From: "David S. Miller" > Date: Tue, 11 Jun 2002 00:36:25 -0700 (PDT) > > The DMA_ALIGN attribute doesn't work, on some systems the PCI > cacheline size is determined at boot time not compile time. > > Another note, it could be per-PCI controller what this cacheline size > is. We'll need to pass in a pdev to the alignment interfaces to > do this correctly. > > So none of this can be done at compile time folks. Why is this a problem? So you just make a static inline that takes the pdev and does the Right Thing at runtime... It's implementation- dependent whether it's a compile-time macro or a more elaborate inline... - 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/