diff --git a/[refs] b/[refs]
index 2adcc455b7bd..1c95dcdb437c 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9442e691e4aec85eba43ac60a3e77c77fd2e73a4
+refs/heads/master: 1a2f67b459bb7846d4a15924face63eb2683acc2
diff --git a/trunk/include/linux/string.h b/trunk/include/linux/string.h
index e4c755860316..4f69ef9e6eb5 100644
--- a/trunk/include/linux/string.h
+++ b/trunk/include/linux/string.h
@@ -99,6 +99,7 @@ extern void * memchr(const void *,int,__kernel_size_t);
 #endif
 
 extern char *kstrdup(const char *s, gfp_t gfp);
+extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
 
 #ifdef __cplusplus
 }
diff --git a/trunk/mm/util.c b/trunk/mm/util.c
index 7368479220b3..e14fa84ef39a 100644
--- a/trunk/mm/util.c
+++ b/trunk/mm/util.c
@@ -40,6 +40,24 @@ char *kstrdup(const char *s, gfp_t gfp)
 }
 EXPORT_SYMBOL(kstrdup);
 
+/**
+ * kmemdup - duplicate region of memory
+ *
+ * @src: memory region to duplicate
+ * @len: memory region length
+ * @gfp: GFP mask to use
+ */
+void *kmemdup(const void *src, size_t len, gfp_t gfp)
+{
+	void *p;
+
+	p = ____kmalloc(len, gfp);
+	if (p)
+		memcpy(p, src, len);
+	return p;
+}
+EXPORT_SYMBOL(kmemdup);
+
 /*
  * strndup_user - duplicate an existing string from user space
  *