From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from verein.lst.de ([213.95.11.211]:52524 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729027AbfJaSc7 (ORCPT ); Thu, 31 Oct 2019 14:32:59 -0400 Date: Thu, 31 Oct 2019 19:32:55 +0100 From: Christoph Hellwig 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> Sender: linux-s390-owner@vger.kernel.org List-ID: To: Catalin Marinas Cc: Christoph Hellwig , 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 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