diff --git a/[refs] b/[refs]
index d87a880d9a23..0905325e4888 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: be6e518b625a90e84d26371f722474e239c01e4c
+refs/heads/master: b887d3f2c63543dce1a0825e41be3a8d3ebef78d
diff --git a/trunk/include/asm-mips/io.h b/trunk/include/asm-mips/io.h
index a9fa1254894a..05de7c174e67 100644
--- a/trunk/include/asm-mips/io.h
+++ b/trunk/include/asm-mips/io.h
@@ -342,7 +342,7 @@ static inline void pfx##write##bwlq(type val,				\
 		BUG();							\
 }									\
 									\
-static inline type pfx##read##bwlq(volatile void __iomem *mem)		\
+static inline type pfx##read##bwlq(const volatile void __iomem *mem)	\
 {									\
 	volatile type *__mem;						\
 	type __val;							\