diff --git a/include/asm-x86/processor_64.h b/include/asm-x86/processor_64.h
index f422becbddd9..398c39160fce 100644
--- a/include/asm-x86/processor_64.h
+++ b/include/asm-x86/processor_64.h
@@ -390,12 +390,6 @@ static inline void sync_core(void)
 	asm volatile("cpuid" : "=a" (tmp) : "0" (1) : "ebx","ecx","edx","memory");
 } 
 
-#define ARCH_HAS_PREFETCH
-static inline void prefetch(void *x) 
-{ 
-	asm volatile("prefetcht0 (%0)" :: "r" (x));
-} 
-
 #define ARCH_HAS_PREFETCHW 1
 static inline void prefetchw(void *x) 
 { 
diff --git a/include/linux/prefetch.h b/include/linux/prefetch.h
index 1adfe668d031..af7c36a5a521 100644
--- a/include/linux/prefetch.h
+++ b/include/linux/prefetch.h
@@ -34,17 +34,12 @@
 	
 */
 
-/*
- *	These cannot be do{}while(0) macros. See the mental gymnastics in
- *	the loop macro.
- */
- 
 #ifndef ARCH_HAS_PREFETCH
-static inline void prefetch(const void *x) {;}
+#define prefetch(x) __builtin_prefetch(x)
 #endif
 
 #ifndef ARCH_HAS_PREFETCHW
-static inline void prefetchw(const void *x) {;}
+#define prefetchw(x) __builtin_prefetch(x,1)
 #endif
 
 #ifndef ARCH_HAS_SPINLOCK_PREFETCH