Commit f1b9032f authored Nov 17, 2015 by Andrey Ryabinin Committed by Catalin Marinas Nov 26, 2015

arm64: KASAN depends on !(ARM64_16K_PAGES && ARM64_VA_BITS_48)



On KASAN + 16K_PAGES + 48BIT_VA
 arch/arm64/mm/kasan_init.c: In function ‘kasan_early_init’:
 include/linux/compiler.h:484:38: error: call to ‘__compiletime_assert_95’ declared with attribute error: BUILD_BUG_ON failed: !IS_ALIGNED(KASAN_SHADOW_END, PGDIR_SIZE)
    _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)

Currently KASAN will not work on 16K_PAGES and 48BIT_VA, so
forbid such configuration to avoid above build failure.

Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reported-by: Suzuki K. Poulose <Suzuki.Poulose@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

parent 3b12acf4

arch/arm64/Kconfig

+1 −1

Original line number	Diff line number	Diff line
		@@ -49,7 +49,7 @@ config ARM64
		select HAVE_ARCH_AUDITSYSCALL
		select HAVE_ARCH_BITREVERSE
		select HAVE_ARCH_JUMP_LABEL
		select HAVE_ARCH_KASAN if SPARSEMEM_VMEMMAP
		select HAVE_ARCH_KASAN if SPARSEMEM_VMEMMAP && !(ARM64_16K_PAGES && ARM64_VA_BITS_48)
		select HAVE_ARCH_KGDB
		select HAVE_ARCH_SECCOMP_FILTER
		select HAVE_ARCH_TRACEHOOK

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