diff --git a/[refs] b/[refs]
index ff54a24393c0..9aebfb49515d 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: bdde37163e1fd474509aab90f5eaacee46100107
+refs/heads/master: b232e0732b1d763834c3d5b098d25d59337ba075
diff --git a/trunk/tools/perf/util/include/linux/string.h b/trunk/tools/perf/util/include/linux/string.h
index 3b2f5900276f..6f19c548ecc0 100644
--- a/trunk/tools/perf/util/include/linux/string.h
+++ b/trunk/tools/perf/util/include/linux/string.h
@@ -1 +1,3 @@
 #include <string.h>
+
+void *memdup(const void *src, size_t len);
diff --git a/trunk/tools/perf/util/string.c b/trunk/tools/perf/util/string.c
index 199bc4d8905d..32170590892d 100644
--- a/trunk/tools/perf/util/string.c
+++ b/trunk/tools/perf/util/string.c
@@ -1,5 +1,5 @@
 #include "util.h"
-#include "string.h"
+#include "linux/string.h"
 
 #define K 1024LL
 /*
@@ -335,3 +335,19 @@ char *rtrim(char *s)
 
 	return s;
 }
+
+/**
+ * memdup - duplicate region of memory
+ * @src: memory region to duplicate
+ * @len: memory region length
+ */
+void *memdup(const void *src, size_t len)
+{
+	void *p;
+
+	p = malloc(len);
+	if (p)
+		memcpy(p, src, len);
+
+	return p;
+}