arm64: introduce VA_START macro - the first kernel virtual address.

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>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index 6b4c3ad..11ccf6c 100644 (file)
--- 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 26b0666..581d140 100644 (file)
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -41,7 +41,7 @@
  *     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))