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[217.140.101.70]) by mx.google.com with ESMTP id l14si3802171edv.262.2019.05.29.03.03.43 for ; Wed, 29 May 2019 03:03:43 -0700 (PDT) Received-SPF: pass (google.com: domain of will.deacon@arm.com designates 217.140.101.70 as permitted sender) client-ip=217.140.101.70; Authentication-Results: mx.google.com; spf=pass (google.com: domain of will.deacon@arm.com designates 217.140.101.70 as permitted sender) smtp.mailfrom=will.deacon@arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9374A341; Wed, 29 May 2019 03:03:42 -0700 (PDT) Received: from fuggles.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 6034F3F5AF; Wed, 29 May 2019 03:03:41 -0700 (PDT) Date: Wed, 29 May 2019 11:03:38 +0100 From: Will Deacon To: Robin Murphy , akpm@linux-foundation.org Cc: catalin.marinas@arm.com, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3.1 4/4] arm64: mm: Implement pte_devmap support Message-ID: <20190529100338.GB4485@fuggles.cambridge.arm.com> References: <817d92886fc3b33bcbf6e105ee83a74babb3a5aa.1558547956.git.robin.murphy@arm.com> <13026c4e64abc17133bbfa07d7731ec6691c0bcd.1559050949.git.robin.murphy@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <13026c4e64abc17133bbfa07d7731ec6691c0bcd.1559050949.git.robin.murphy@arm.com> User-Agent: Mutt/1.11.1+86 (6f28e57d73f2) () X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, May 28, 2019 at 02:46:59PM +0100, Robin Murphy wrote: > In order for things like get_user_pages() to work on ZONE_DEVICE memory, > we need a software PTE bit to identify device-backed PFNs. Hook this up > along with the relevant helpers to join in with ARCH_HAS_PTE_DEVMAP. > > Signed-off-by: Robin Murphy > --- > > Fix to build correctly under all combinations of > CONFIG_PGTABLE_LEVELS and CONFIG_TRANSPARENT_HUGEPAGE. > > arch/arm64/Kconfig | 1 + > arch/arm64/include/asm/pgtable-prot.h | 1 + > arch/arm64/include/asm/pgtable.h | 21 +++++++++++++++++++++ > 3 files changed, 23 insertions(+) Acked-by: Will Deacon Andrew -- please can you update the previous version of this patch, which I think you picked up? Thanks, Will