Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752226AbbKPJ2h (ORCPT ); Mon, 16 Nov 2015 04:28:37 -0500 Received: from mx2.suse.de ([195.135.220.15]:44845 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750911AbbKPJ2e (ORCPT ); Mon, 16 Nov 2015 04:28:34 -0500 Date: Mon, 16 Nov 2015 10:28:32 +0100 Message-ID: From: Takashi Iwai To: Boaz Harrosh Cc: Stable Tree , Greg KH , Dan Williams , linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org, linux-nvdimm@ml01.01.org, Jaroslav Kysela , Jeff Moyer Subject: Re: [PATCH] sound: depend on ZONE_DMA In-Reply-To: <56499AB4.6060507@plexistor.com> References: <20151112201357.11045.22705.stgit@dwillia2-desk3.jf.intel.com> <56486417.7090802@plexistor.com> <56499AB4.6060507@plexistor.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL/10.8 Emacs/24.5 (x86_64-suse-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1938 Lines: 57 On Mon, 16 Nov 2015 09:58:28 +0100, Boaz Harrosh wrote: > > On 11/16/2015 09:40 AM, Takashi Iwai wrote: > > On Sun, 15 Nov 2015 11:53:11 +0100, > > Boaz Harrosh wrote: > >> > >> On 11/12/2015 10:38 PM, Takashi Iwai wrote: > >>> On Thu, 12 Nov 2015 21:13:57 +0100, > >>> Dan Williams wrote: > >>>> > >>>> There are several sound drivers that 'select ZONE_DMA'. This is > >>>> backwards as ZONE_DMA is an architecture capability exported to drivers. > >>>> Switch the polarity of the dependency to disable these drivers when the > >>>> architecture does not support ZONE_DMA. This was discovered in the > >>>> context of testing/enabling devm_memremap_pages() which depends on > >>>> ZONE_DEVICE. ZONE_DEVICE in turn depends on !ZONE_DMA. > >>> > >>> Makes sense. I applied it now, thanks. > >>> > >> > >> Please add: > >> CC: Stable Tree > > > > Sorry, too late, already merged. > > > > > > Takashi > > > > Hi Greg > > Please include the mainline patch: > [2db1a57] ALSA: pci: depend on ZONE_DMA (by Dan Williams) > > To the stable tree for v4.3.X Kernel. > > This patch is needed for proper operation of the 4.3 pmem.ko driver. Long > story, but without this patch the persistent-memory will not be able to > work with the new 4.3 support of page-struct which is needed if we want to > RDMA and/or IO directly to persistent memory. > [Is to do with the new ZONE_DEVICE and too many ZONE(s) if ZONE_DMA is enabled] Well, it's not exactly true: you just need to deselect some drivers to allow CONFIG_ZONE_DMA to be disabled. It's merely another side of coin. I don't mind including this to 4.3, though, but just want to correct the statement. Takashi -- 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/