diff --git a/include/linux/phy.h b/include/linux/phy.h
index 79f337c..c599f7ec 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -129,7 +129,12 @@
 };
 #define to_mii_bus(d) container_of(d, struct mii_bus, dev)
 
-struct mii_bus *mdiobus_alloc(void);
+struct mii_bus *mdiobus_alloc_size(size_t);
+static inline struct mii_bus *mdiobus_alloc(void)
+{
+	return mdiobus_alloc_size(0);
+}
+
 int mdiobus_register(struct mii_bus *bus);
 void mdiobus_unregister(struct mii_bus *bus);
 void mdiobus_free(struct mii_bus *bus);