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 <[email protected]> Reported-by: Suzuki K. Poulose <[email protected]> Acked-by: Mark Rutland <[email protected]> Signed-off-by: Catalin Marinas <[email protected]>
jljusten · Nov 26, 2015 · f1b9032 · f1b9032
1 parent 3b12acf
commit f1b9032
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
@@ -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