diff --git a/include/asm-arm/io.h b/include/asm-arm/io.h
index 648a10d..47c18e7 100644
--- a/include/asm-arm/io.h
+++ b/include/asm-arm/io.h
@@ -29,6 +29,10 @@
 #include <asm/arch/hardware.h>
 #endif	/* XXX###XXX */
 
+static inline void sync(void)
+{
+}
+
 /*
  * Generic virtual read/write.  Note that we don't support half-word
  * read/writes.  We define __arch_*[bl] here, and leave __arch_*w
diff --git a/include/asm-avr32/io.h b/include/asm-avr32/io.h
index e86c456..3c0d569 100644
--- a/include/asm-avr32/io.h
+++ b/include/asm-avr32/io.h
@@ -89,4 +89,8 @@
 
 #endif /* __KERNEL__ */
 
+static inline void sync(void)
+{
+}
+
 #endif /* __ASM_AVR32_IO_H */
diff --git a/include/asm-blackfin/io.h b/include/asm-blackfin/io.h
index e5b388e..fc27194 100644
--- a/include/asm-blackfin/io.h
+++ b/include/asm-blackfin/io.h
@@ -25,6 +25,11 @@
 #ifndef _BLACKFIN_IO_H
 #define _BLACKFIN_IO_H
 
+static inline void sync(void)
+{
+	__asm__ __volatile__ asm("ssync" : : : "memory");
+}
+
 #ifdef __KERNEL__
 
 #include <linux/config.h>
diff --git a/include/asm-i386/io.h b/include/asm-i386/io.h
index 85d44aa..e64d788 100644
--- a/include/asm-i386/io.h
+++ b/include/asm-i386/io.h
@@ -201,4 +201,8 @@
 __OUTS(w)
 __OUTS(l)
 
+static inline void sync(void)
+{
+}
+
 #endif
diff --git a/include/asm-m68k/io.h b/include/asm-m68k/io.h
index 79a9626..7bbdefb 100644
--- a/include/asm-m68k/io.h
+++ b/include/asm-m68k/io.h
@@ -1 +1,8 @@
-/* */
+#ifndef __ASM_M68K_IO_H_
+#define __ASM_M68K_IO_H_
+
+static inline void sync(void)
+{
+}
+
+#endif /* __ASM_M68K_IO_H_ */
diff --git a/include/asm-microblaze/io.h b/include/asm-microblaze/io.h
index 3359045..1c77ade 100644
--- a/include/asm-microblaze/io.h
+++ b/include/asm-microblaze/io.h
@@ -125,4 +125,8 @@
 #define ioremap_writethrough(physaddr, size)	(physaddr)
 #define ioremap_fullcache(physaddr, size)	(physaddr)
 
+static inline void sync(void)
+{
+}
+
 #endif /* __MICROBLAZE_IO_H__ */
diff --git a/include/asm-mips/io.h b/include/asm-mips/io.h
index 857fb03..cd4d5dc 100644
--- a/include/asm-mips/io.h
+++ b/include/asm-mips/io.h
@@ -447,4 +447,8 @@
 #define dma_cache_wback(start,size)	_dma_cache_wback(start,size)
 #define dma_cache_inv(start,size)	_dma_cache_inv(start,size)
 
+static inline void sync(void)
+{
+}
+
 #endif /* _ASM_IO_H */
diff --git a/include/asm-nios/io.h b/include/asm-nios/io.h
index 07499d9..d77695a 100644
--- a/include/asm-nios/io.h
+++ b/include/asm-nios/io.h
@@ -97,4 +97,8 @@
 	while (count--) outl (*p++, port);
 }
 
+static inline void sync(void)
+{
+}
+
 #endif /* __ASM_NIOS_IO_H_ */
diff --git a/include/asm-nios2/io.h b/include/asm-nios2/io.h
index 0fab53b..5bb5322 100644
--- a/include/asm-nios2/io.h
+++ b/include/asm-nios2/io.h
@@ -24,7 +24,10 @@
 #ifndef __ASM_NIOS2_IO_H_
 #define __ASM_NIOS2_IO_H_
 
-#define sync() asm volatile ("sync" : : : "memory");
+static inline void sync(void)
+{
+	__asm__ __volatile__ ("sync" : : : "memory");
+}
 
 extern unsigned char inb (unsigned char *port);
 extern unsigned short inw (unsigned short *port);
diff --git a/include/asm-ppc/io.h b/include/asm-ppc/io.h
index 8e5fe11..bbc9ba0 100644
--- a/include/asm-ppc/io.h
+++ b/include/asm-ppc/io.h
@@ -95,8 +95,15 @@
  * Acts as a barrier to ensure all previous I/O accesses have
  * completed before any further ones are issued.
  */
-#define eieio() __asm__ __volatile__ ("eieio" : : : "memory");
-#define sync()  __asm__ __volatile__ ("sync" : : : "memory");
+static inline void eieio(void)
+{
+	__asm__ __volatile__ ("eieio" : : : "memory");
+}
+
+static inline void sync(void)
+{
+	__asm__ __volatile__ ("sync" : : : "memory");
+}
 
 /* Enforce in-order execution of data I/O.
  * No distinction between read/write on PPC; use eieio for all three.