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From: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Subject: [PATCH v6 1/6] arm64: introduce VA_START macro - the first kernel virtual address.
Date: Thu, 17 Sep 2015 12:38:07 +0300
Message-Id: <1442482692-6416-2-git-send-email-ryabinin.a.a@gmail.com>
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References: <1442482692-6416-1-git-send-email-ryabinin.a.a@gmail.com>
Sender: owner-linux-mm@kvack.org
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To: Will Deacon <will.deacon@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, linux-arm-kernel@lists.infradead.org
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>, Linus Walleij <linus.walleij@linaro.org>, Alexander Potapenko <glider@google.com>, Dmitry Vyukov <dvyukov@google.com>, Arnd Bergmann <arnd@arndb.de>, linux-kernel@vger.kernel.org, David Keitel <dkeitel@codeaurora.org>, linux-mm@kvack.org, Alexey Klimov <klimov.linux@gmail.com>, Yury <yury.norov@gmail.com>, Andrey Konovalov <andreyknvl@google.com>

In order to not use lengthy (UL(0xffffffffffffffff) << VA_BITS) everywhere,
replace it with VA_START.

Signed-off-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/include/asm/memory.h  | 2 ++
 arch/arm64/include/asm/pgtable.h | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index 6b4c3ad..11ccf6c 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -42,12 +42,14 @@
  * PAGE_OFFSET - the virtual address of the start of the kernel image (top
  *		 (VA_BITS - 1))
  * VA_BITS - the maximum number of bits for virtual addresses.
+ * VA_START - the first kernel virtual address.
  * TASK_SIZE - the maximum size of a user space task.
  * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area.
  * The module space lives between the addresses given by TASK_SIZE
  * and PAGE_OFFSET - it must be within 128MB of the kernel text.
  */
 #define VA_BITS			(CONFIG_ARM64_VA_BITS)
+#define VA_START		(UL(0xffffffffffffffff) << VA_BITS)
 #define PAGE_OFFSET		(UL(0xffffffffffffffff) << (VA_BITS - 1))
 #define MODULES_END		(PAGE_OFFSET)
 #define MODULES_VADDR		(MODULES_END - SZ_64M)
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 6900b2d9..a53a126 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -45,7 +45,7 @@
  *	fixed mappings and modules
  */
 #define VMEMMAP_SIZE		ALIGN((1UL << (VA_BITS - PAGE_SHIFT)) * sizeof(struct page), PUD_SIZE)
-#define VMALLOC_START		(UL(0xffffffffffffffff) << VA_BITS)
+#define VMALLOC_START		(VA_START)
 #define VMALLOC_END		(PAGE_OFFSET - PUD_SIZE - VMEMMAP_SIZE - SZ_64K)
 
 #define vmemmap			((struct page *)(VMALLOC_END + SZ_64K))
-- 
2.4.6

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