Messages in this thread Patch in this message | | | From | Stephen Boyd <> | Subject | [PATCH v2 4/5] arm64: Add support for arch_memremap_ro() | Date | Fri, 14 Jun 2019 13:37:16 -0700 |
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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 <evgreen@chromium.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: Andy Gross <agross@kernel.org> Cc: Will Deacon <will.deacon@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dan Williams <dan.j.williams@intel.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Stephen Boyd <swboyd@chromium.org> --- 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 b807cb9b517d..cc33f4c8647b 100644 --- a/arch/arm64/include/asm/io.h +++ b/arch/arm64/include/asm/io.h @@ -183,6 +183,7 @@ 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
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