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=-7.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable 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 1D1BBCA9ECB for ; Thu, 31 Oct 2019 18:35:09 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6DA0C2086D for ; Thu, 31 Oct 2019 18:35:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6DA0C2086D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 473vBf2dkWzF5xx for ; Fri, 1 Nov 2019 05:35:06 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lst.de (client-ip=213.95.11.211; helo=verein.lst.de; envelope-from=hch@lst.de; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=lst.de Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 473v8G0gGmzF5Xm for ; Fri, 1 Nov 2019 05:33:00 +1100 (AEDT) Received: by verein.lst.de (Postfix, from userid 2407) id DC3F5227A81; Thu, 31 Oct 2019 19:32:55 +0100 (CET) Date: Thu, 31 Oct 2019 19:32:55 +0100 From: Christoph Hellwig To: Catalin Marinas Subject: Re: [PATCH] dma/direct: turn ARCH_ZONE_DMA_BITS into a variable Message-ID: <20191031183255.GA10116@lst.de> 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> <20191031180619.GI39590@arrakis.emea.arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191031180619.GI39590@arrakis.emea.arm.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-s390@vger.kernel.org, Vasily Gorbik , linuxppc-dev@lists.ozlabs.org, Heiko Carstens , Robin Murphy , linux-kernel@vger.kernel.org, Christian Borntraeger , iommu@lists.linux-foundation.org, Paul Mackerras , linux-arm-kernel@lists.infradead.org, Will Deacon , Christoph Hellwig , Nicolas Saenz Julienne , Marek Szyprowski Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Thu, Oct 31, 2019 at 06:06:19PM +0000, Catalin Marinas wrote: > 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). Please go ahead: Acked-by: Christoph Hellwig