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[176.122.172.82]) by smtp.gmail.com with ESMTPSA id o86sm1422706pfi.87.2018.02.26.00.21.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 26 Feb 2018 00:21:14 -0800 (PST) From: Alex Shi To: Marc Zyngier , Will Deacon , Ard Biesheuvel , Catalin Marinas , stable@vger.kernel.org, linux-mm@kvack.org (open list:MEMORY MANAGEMENT), linux-kernel@vger.kernel.org (open list) Cc: Laura Abbott Subject: [PATCH 01/52] mm: Introduce lm_alias Date: Mon, 26 Feb 2018 16:19:35 +0800 Message-Id: <1519633227-29832-2-git-send-email-alex.shi@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1519633227-29832-1-git-send-email-alex.shi@linaro.org> References: <1519633227-29832-1-git-send-email-alex.shi@linaro.org> Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Laura Abbott commit 568c5fe5a54 upstream. Certain architectures may have the kernel image mapped separately to alias the linear map. Introduce a macro lm_alias to translate a kernel image symbol into its linear alias. This is used in part with work to add CONFIG_DEBUG_VIRTUAL support for arm64. Reviewed-by: Mark Rutland Tested-by: Mark Rutland Signed-off-by: Laura Abbott Signed-off-by: Will Deacon Signed-off-by: Alex Shi --- include/linux/mm.h | 4 ++++ 1 file changed, 4 insertions(+) -- 2.7.4 diff --git a/include/linux/mm.h b/include/linux/mm.h index 2217e2f..edd2480 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -76,6 +76,10 @@ extern int mmap_rnd_compat_bits __read_mostly; #define page_to_virt(x) __va(PFN_PHYS(page_to_pfn(x))) #endif +#ifndef lm_alias +#define lm_alias(x) __va(__pa_symbol(x)) +#endif + /* * To prevent common memory management code establishing * a zero page mapping on a read fault.