Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751975AbaJJMHb (ORCPT ); Fri, 10 Oct 2014 08:07:31 -0400 Received: from cam-admin0.cambridge.arm.com ([217.140.96.50]:50930 "EHLO cam-admin0.cambridge.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751043AbaJJMH3 (ORCPT ); Fri, 10 Oct 2014 08:07:29 -0400 Date: Fri, 10 Oct 2014 13:07:03 +0100 From: Will Deacon To: Stefano Stabellini Cc: "xen-devel@lists.xensource.com" , "konrad.wilk@oracle.com" , "Ian.Campbell@citrix.com" , "david.vrabel@citrix.com" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux@arm.linux.org.uk" , Catalin Marinas Subject: Re: [PATCH v4 3/7] [RFC] arm/arm64: introduce is_dma_coherent Message-ID: <20141010120702.GI7755@arm.com> References: <1412941908-5850-3-git-send-email-stefano.stabellini@eu.citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1412941908-5850-3-git-send-email-stefano.stabellini@eu.citrix.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 10, 2014 at 12:51:44PM +0100, Stefano Stabellini wrote: > Introduce a function to check whether a device is dma coherent. > > Signed-off-by: Stefano Stabellini > CC: linux@arm.linux.org.uk > CC: catalin.marinas@arm.com > CC: will.deacon@arm.com > CC: linux-arm-kernel@lists.infradead.org > --- > arch/arm/include/asm/dma-mapping.h | 6 ++++++ > arch/arm64/include/asm/dma-mapping.h | 5 +++++ > 2 files changed, 11 insertions(+) > > diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h > index c45b61a..bededbb 100644 > --- a/arch/arm/include/asm/dma-mapping.h > +++ b/arch/arm/include/asm/dma-mapping.h > @@ -126,6 +126,12 @@ static inline int set_arch_dma_coherent_ops(struct device *dev) > set_dma_ops(dev, &arm_coherent_dma_ops); > return 0; > } > + > +static inline bool is_dma_coherent(struct device *dev) > +{ > + return (__generic_dma_ops(dev) == &arm_coherent_dma_ops); > +} Hmm, what about the IOMMU ops? Will -- 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/