diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index d356f802945ae3348540c0cd099372a3a97f1e9e..303871651f8aa0cd92dff49cb188c2ebd5e0fab5 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -32,9 +32,9 @@
 /* prevent prefetching of coherent DMA data ahead of a dma-complete */
 #ifndef __io_ar
 #ifdef rmb
-#define __io_ar()      rmb()
+#define __io_ar(v)      rmb()
 #else
-#define __io_ar()      barrier()
+#define __io_ar(v)      barrier()
 #endif
 #endif
 
@@ -65,7 +65,7 @@
 #endif
 
 #ifndef __io_par
-#define __io_par()     __io_ar()
+#define __io_par(v)     __io_ar(v)
 #endif
 
 
@@ -158,7 +158,7 @@ static inline u8 readb(const volatile void __iomem *addr)
 
 	__io_br();
 	val = __raw_readb(addr);
-	__io_ar();
+	__io_ar(val);
 	return val;
 }
 #endif
@@ -171,7 +171,7 @@ static inline u16 readw(const volatile void __iomem *addr)
 
 	__io_br();
 	val = __le16_to_cpu(__raw_readw(addr));
-	__io_ar();
+	__io_ar(val);
 	return val;
 }
 #endif
@@ -184,7 +184,7 @@ static inline u32 readl(const volatile void __iomem *addr)
 
 	__io_br();
 	val = __le32_to_cpu(__raw_readl(addr));
-	__io_ar();
+	__io_ar(val);
 	return val;
 }
 #endif
@@ -198,7 +198,7 @@ static inline u64 readq(const volatile void __iomem *addr)
 
 	__io_br();
 	val = __le64_to_cpu(__raw_readq(addr));
-	__io_ar();
+	__io_ar(val);
 	return val;
 }
 #endif
@@ -471,7 +471,7 @@ static inline u8 inb(unsigned long addr)
 
 	__io_pbr();
 	val = __raw_readb(PCI_IOBASE + addr);
-	__io_par();
+	__io_par(val);
 	return val;
 }
 #endif
@@ -484,7 +484,7 @@ static inline u16 inw(unsigned long addr)
 
 	__io_pbr();
 	val = __le16_to_cpu(__raw_readw(PCI_IOBASE + addr));
-	__io_par();
+	__io_par(val);
 	return val;
 }
 #endif
@@ -497,7 +497,7 @@ static inline u32 inl(unsigned long addr)
 
 	__io_pbr();
 	val = __le32_to_cpu(__raw_readl(PCI_IOBASE + addr));
-	__io_par();
+	__io_par(val);
 	return val;
 }
 #endif