Suggested-by: Thomas Huth <thuth@xxxxxxxxxx>
Cc: Andrew Jones <drjones@xxxxxxxxxx>
Cc: Thomas Huth <thuth@xxxxxxxxxx>
Cc: Radim Krčmář <rkrcmar@xxxxxxxxxx>
Reviewed-by: Andrew Jones <drjones@xxxxxxxxxx>
Signed-off-by: Alexander Gordeev <agordeev@xxxxxxxxxx>
---
lib/asm-generic/io.h | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/lib/asm-generic/io.h b/lib/asm-generic/io.h
index 3585ac0..1834720 100644
--- a/lib/asm-generic/io.h
+++ b/lib/asm-generic/io.h
@@ -127,11 +127,14 @@ static inline u64 __bswap64(u64 x)
({ u64 __r = !__cpu_is_be() ? __bswap64(x) : ((u64)x); __r; })
#define cpu_to_be64 be64_to_cpu
+#ifndef mb
+#define mb() asm volatile("":::"memory")
+#endif
#ifndef rmb
-#define rmb() do { } while (0)
+#define rmb() asm volatile("":::"memory")
#endif
#ifndef wmb
-#define wmb() do { } while (0)
+#define wmb() asm volatile("":::"memory")
#endif
#define readb(addr) \
--
1.8.3.1
--
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