--- a/backport-include/linux/device.h
+++ b/backport-include/linux/device.h
@@ -200,4 +200,20 @@ static inline void *devm_kmemdup(struct
 #endif
 
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,15,0)
+#define devm_kmemdup LINUX_BACKPORT(devm_kmemdup)
+static inline void *devm_kmemdup(struct device *dev, const void *src,
+				 size_t len, gfp_t gfp)
+{
+	void *p;
+
+	p = devm_kmalloc(dev, len, gfp);
+	if (p)
+		memcpy(p, src, len);
+
+	return p;
+}
+#endif
+
+
 #endif /* __BACKPORT_DEVICE_H */