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Tue, 10 Sep 2019 09:09:07 -0700 (PDT) From: Stephen Boyd To: Dan Williams Subject: [PATCH v3 4/5] arm64: Add support for arch_memremap_ro() Date: Tue, 10 Sep 2019 09:09:02 -0700 Message-Id: <20190910160903.65694-5-swboyd@chromium.org> X-Mailer: git-send-email 2.23.0.162.g0b9fbb3734-goog In-Reply-To: <20190910160903.65694-1-swboyd@chromium.org> References: <20190910160903.65694-1-swboyd@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190910_090909_065247_916878E5 X-CRM114-Status: GOOD ( 11.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, Will Deacon , linux-kernel@vger.kernel.org, Evan Green , Bjorn Andersson , Rob Herring , Andy Gross , Catalin Marinas , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Pass in PAGE_KERNEL_RO to the underlying IO mapping mechanism to get a read-only mapping for the MEMREMAP_RO type of memory mappings that memremap() supports. Cc: Evan Green Cc: Rob Herring Cc: Bjorn Andersson Cc: Andy Gross Cc: Will Deacon Cc: Catalin Marinas Cc: Dan Williams Reviewed-by: Bjorn Andersson Acked-by: Catalin Marinas Signed-off-by: Stephen Boyd --- arch/arm64/include/asm/io.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h index 7ed92626949d..c623e75d9152 100644 --- a/arch/arm64/include/asm/io.h +++ b/arch/arm64/include/asm/io.h @@ -172,6 +172,7 @@ extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size); #define ioremap_nocache(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE)) #define ioremap_wc(addr, size) __ioremap((addr), (size), __pgprot(PROT_NORMAL_NC)) #define ioremap_wt(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE)) +#define arch_memremap_ro(addr, size) __ioremap((addr), (size), PAGE_KERNEL_RO) #define iounmap __iounmap /* -- Sent by a computer through tubes _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel