From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8337CA9ECB for ; Thu, 31 Oct 2019 18:06:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 77B6B20650 for ; Thu, 31 Oct 2019 18:06:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729191AbfJaSGY (ORCPT ); Thu, 31 Oct 2019 14:06:24 -0400 Received: from foss.arm.com ([217.140.110.172]:53562 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726602AbfJaSGY (ORCPT ); Thu, 31 Oct 2019 14:06:24 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id AC1D41FB; Thu, 31 Oct 2019 11:06:23 -0700 (PDT) Received: from arrakis.emea.arm.com (arrakis.cambridge.arm.com [10.1.197.42]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A95563F6C4; Thu, 31 Oct 2019 11:06:21 -0700 (PDT) Date: Thu, 31 Oct 2019 18:06:19 +0000 From: Catalin Marinas To: Christoph Hellwig Cc: Nicolas Saenz Julienne , Marek Szyprowski , Robin Murphy , Will Deacon , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, iommu@lists.linux-foundation.org Subject: Re: [PATCH] dma/direct: turn ARCH_ZONE_DMA_BITS into a variable Message-ID: <20191031180619.GI39590@arrakis.emea.arm.com> References: <20191031152837.15253-1-nsaenzjulienne@suse.de> <20191031154759.GA7162@lst.de> <40d06d463c05d36968e8b64924d78f7794f8de50.camel@suse.de> <20191031155750.GA7394@lst.de> <6726a651c12d91ca22b9d8984745d90db5d507ec.camel@suse.de> <20191031165853.GA8532@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191031165853.GA8532@lst.de> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Oct 31, 2019 at 05:58:53PM +0100, Christoph Hellwig wrote: > On Thu, Oct 31, 2019 at 05:22:59PM +0100, Nicolas Saenz Julienne wrote: > > OK, I see what you mean now. It's wrong indeed. > > > > The trouble is the ZONE_DMA series[1] in arm64, also due for v5.5, will be > > affected by this patch. I don't know the right way to approach this problem > > since depending on the merge order, this patch should be updated or the arm64 > > ZONE_DMA series fixed. > > > > Maybe it's easier to just wait for v5.6. > > Ok, I can wait. Or the arm64 maintainers can pick up this patch if > you want to add it to that series. This branch is stable (may add a fix but not I'm not rebasing it) if you want to base this patch on top: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/zone-dma Otherwise, with your ack, I can add it on top of the above branch (aimed at 5.5). -- Catalin