1 files changed, 10 insertions, 1 deletions
diff --git a/arch/x86/boot/string.c b/arch/x86/boot/string.c
index 574dedfe289..493f3fd9f13 100644
--- a/arch/x86/boot/string.c
+++ b/arch/x86/boot/string.c
@@ -12,7 +12,16 @@
  * Very basic string functions
  */
 
-#include "boot.h"
+#include <linux/types.h>
+#include "ctype.h"
+
+int memcmp(const void *s1, const void *s2, size_t len)
+{
+	u8 diff;
+	asm("repe; cmpsb; setnz %0"
+	    : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len));
+	return diff;
+}
 
 int strcmp(const char *str1, const char *str2)
 {