diff --git a/mm/util.c b/mm/util.c
index 73684792..e14fa84 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -40,6 +40,24 @@
 }
 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
  *