[01/45] mm: Introduce lm_alias

Message ID	1519908862-11425-2-git-send-email-alex.shi@linaro.org
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Headers	show Delivered-To: patch@linaro.org Received-SPF: pass (google.com: best guess record for domain of stable-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; From: Alex Shi <alex.shi@linaro.org> To: Marc Zyngier <marc.zyngier@arm.com>, Will Deacon <will.deacon@arm.com>, Ard Biesheuvel <ard.biesheuvel@linaro.org>, Catalin Marinas <catalin.marinas@arm.com>, stable@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Laura Abbott <labbott@redhat.com>, Alex Shi <alex.shi@linaro.org> Subject: [PATCH 01/45] mm: Introduce lm_alias Date: Thu, 1 Mar 2018 20:53:38 +0800 Message-Id: <1519908862-11425-2-git-send-email-alex.shi@linaro.org> In-Reply-To: <1519908862-11425-1-git-send-email-alex.shi@linaro.org> References: <1519908862-11425-1-git-send-email-alex.shi@linaro.org> Sender: stable-owner@vger.kernel.org Precedence: bulk
Series	[01/45] mm: Introduce lm_alias \| expand [01/45] mm: Introduce lm_alias [05/45] arm64: move TASK_* definitions to <asm/processor.h> [11/45] arm64: syscallno is secretly an int, make it official [15/45] arm64: uaccess: Mask __user pointers for __arch_{clear, copy_*}_user [22/45] arm64: Move post_ttbr_update_workaround to C code [26/45] arm64: entry: Apply BP hardening for high-priority synchronous exceptions [33/45] arm/arm64: KVM: Add smccc accessors to PSCI code

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1519908862-11425-2-git-send-email-alex.shi@linaro.org

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New

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Received-SPF: pass (google.com: best guess record for domain of
	stable-owner@vger.kernel.org designates 209.132.180.67 as
	permitted sender) client-ip=209.132.180.67; 
From: Alex Shi <alex.shi@linaro.org>
To: Marc Zyngier <marc.zyngier@arm.com>, Will Deacon <will.deacon@arm.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	stable@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Laura Abbott <labbott@redhat.com>, Alex Shi <alex.shi@linaro.org>
Subject: [PATCH 01/45] mm: Introduce lm_alias
Date: Thu,  1 Mar 2018 20:53:38 +0800
Message-Id: <1519908862-11425-2-git-send-email-alex.shi@linaro.org>
In-Reply-To: <1519908862-11425-1-git-send-email-alex.shi@linaro.org>
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Series

[01/45] mm: Introduce lm_alias | expand

Commit Message

Alex Shi March 1, 2018, 12:53 p.m. UTC

From: Laura Abbott <labbott@redhat.com>


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 <mark.rutland@arm.com>

Tested-by: Mark Rutland <mark.rutland@arm.com>

Signed-off-by: Laura Abbott <labbott@redhat.com>

Signed-off-by: Will Deacon <will.deacon@arm.com>

Signed-off-by: Alex Shi <alex.shi@linaro.org>

---
 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.

[01/45] mm: Introduce lm_alias

Commit Message

Patch