diff options
| author | Will Deacon <will@kernel.org> | 2019-08-13 16:58:36 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2019-08-14 13:08:40 +0100 |
| commit | a5ac40f53bfa5e43d9c76e3c23415ee4afd71932 (patch) | |
| tree | 7bd6af379dccf8cb0590181103bd4101fa9e11aa | |
| parent | 9ba33dcc6bef4e56c762b446f0000f27ee737b8b (diff) | |
arm64: memory: Simplify _VA_START and _PAGE_OFFSET definitions
Rather than subtracting from -1 and then adding 1, we can simply
subtract from 0.
Tested-by: Steve Capper <steve.capper@arm.com>
Reviewed-by: Steve Capper <steve.capper@arm.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
| -rw-r--r-- | arch/arm64/include/asm/memory.h | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index e6353d1a75fa..a7a985602cba 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -44,8 +44,7 @@ * VA_START - the first kernel virtual address. */ #define VA_BITS (CONFIG_ARM64_VA_BITS) -#define _PAGE_OFFSET(va) (UL(0xffffffffffffffff) - \ - (UL(1) << (va)) + 1) +#define _PAGE_OFFSET(va) (-(UL(1) << (va))) #define PAGE_OFFSET (_PAGE_OFFSET(VA_BITS)) #define KIMAGE_VADDR (MODULES_END) #define BPF_JIT_REGION_START (KASAN_SHADOW_END) @@ -63,8 +62,7 @@ #else #define VA_BITS_MIN (VA_BITS) #endif -#define _VA_START(va) (UL(0xffffffffffffffff) - \ - (UL(1) << ((va) - 1)) + 1) +#define _VA_START(va) (-(UL(1) << ((va) - 1))) #define KERNEL_START _text #define KERNEL_END _end |