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Commit a5ac40f5 authored by Will Deacon's avatar Will Deacon
Browse files

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: default avatarSteve Capper <steve.capper@arm.com>
Reviewed-by: default avatarSteve Capper <steve.capper@arm.com>
Tested-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 9ba33dcc

arch/arm64/include/asm/memory.h

+2 −4
Original line number Diff line number Diff line
@@ -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