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[73.95.159.87]) by smtp.gmail.com with ESMTPSA id c13sm22298080iok.84.2019.08.13.09.39.42 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Tue, 13 Aug 2019 09:39:42 -0700 (PDT) Date: Tue, 13 Aug 2019 09:39:41 -0700 (PDT) From: Paul Walmsley X-X-Sender: paulw@viisi.sifive.com To: Logan Gunthorpe Subject: Re: [PATCH v4 2/2] RISC-V: Implement sparsemem In-Reply-To: <5506c875-9387-acc9-a7fe-5b7c10036c40@deltatee.com> Message-ID: References: <20190109203911.7887-1-logang@deltatee.com> <20190109203911.7887-3-logang@deltatee.com> <0926a261-520e-4c40-f926-ddd40bb8ce44@deltatee.com> <96156909-1453-d487-ff66-a041d67c74d6@deltatee.com> <5506c875-9387-acc9-a7fe-5b7c10036c40@deltatee.com> User-Agent: Alpine 2.21.9999 (DEB 301 2018-08-15) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190813_093944_081555_81459912 X-CRM114-Status: UNSURE ( 7.54 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Herring , Albert Ou , Andrew Waterman , Palmer Dabbelt , Linux Kernel Mailing List , Stephen Bates , linux-mm@vger.kernel.org, Greentime Hu , Olof Johansson , greentime.hu@sifive.com, linux-riscv@lists.infradead.org, Michael Clark , Christoph Hellwig Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org On Tue, 13 Aug 2019, Logan Gunthorpe wrote: > On 2019-08-13 12:04 a.m., Greentime Hu wrote: > > > Every architecture with mmu defines their own pfn_valid(). > > Not true. Arm64, for example just uses the generic implementation in > mmzone.h. arm64 seems to define their own: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/Kconfig#n899 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/mm/init.c#n235 While there are many architectures which have their own pfn_valid(); oddly, almost none of them set HAVE_ARCH_PFN_VALID ? - Paul _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv