diff --git a/[refs] b/[refs]
index f59b16a5db5d..bc4841310791 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 334280fff3f7201d0fd564fe85e0a6f035ce3f68
+refs/heads/master: 216e39db112da4d25a52aeb956e7da70fdd0d94c
diff --git a/trunk/include/asm-blackfin/io.h b/trunk/include/asm-blackfin/io.h
index eac8bcaf64c2..142cb333db29 100644
--- a/trunk/include/asm-blackfin/io.h
+++ b/trunk/include/asm-blackfin/io.h
@@ -20,7 +20,7 @@
  */
 #ifndef __ASSEMBLY__
 
-static inline unsigned char readb(void __iomem *addr)
+static inline unsigned char readb(const volatile void __iomem *addr)
 {
 	unsigned int val;
 	int tmp;
@@ -35,7 +35,7 @@ static inline unsigned char readb(void __iomem *addr)
 	return (unsigned char) val;
 }
 
-static inline unsigned short readw(void __iomem *addr)
+static inline unsigned short readw(const volatile void __iomem *addr)
 {
 	unsigned int val;
 	int tmp;
@@ -50,7 +50,7 @@ static inline unsigned short readw(void __iomem *addr)
 	return (unsigned short) val;
 }
 
-static inline unsigned int readl(void __iomem *addr)
+static inline unsigned int readl(const volatile void __iomem *addr)
 {
 	unsigned int val;
 	int tmp;