[PATCH] ARM: fix dmb on ARMv8

[PATCH] ARM: fix dmb on ARMv8

[Sascha Hauer]

Add "sy" argument to the dmb instruction. This is optional for ARMv7,
but mandatory for ARMv8. On ARMv7 "dsb" and "dsb sy" are equivalent,
so use "dsb sy" on both ARMv7 and ARMv8 and drop the unnecessary #ifdef

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/include/asm/system.h | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index 9e88001533..bf3b7b02e2 100644
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -25,12 +25,8 @@
 
 #if __LINUX_ARM_ARCH__ >= 7
 #define isb() __asm__ __volatile__ ("isb" : : : "memory")
-#ifdef CONFIG_CPU_64v8
 #define dsb() __asm__ __volatile__ ("dsb sy" : : : "memory")
-#else
-#define dsb() __asm__ __volatile__ ("dsb" : : : "memory")
-#endif
-#define dmb() __asm__ __volatile__ ("dmb" : : : "memory")
+#define dmb() __asm__ __volatile__ ("dmb sy" : : : "memory")
 #elif defined(CONFIG_CPU_XSC3) || __LINUX_ARM_ARCH__ == 6
 #define isb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c5, 4" \
                                     : : "r" (0) : "memory")
-- 
2.39.2