diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 20ba38a346fed0..0b04ce3766c8fa 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -842,6 +842,11 @@ int __mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
 }
 EXPORT_SYMBOL_GPL(__mdiobus_modify_changed);
 
+static u32 mdiobus_c45_addr(int devad, u16 regnum)
+{
+	return MII_ADDR_C45 | devad << MII_DEVADDR_C45_SHIFT | regnum;
+}
+
 /**
  * __mdiobus_c45_read - Unlocked version of the mdiobus_c45_read function
  * @bus: the mii_bus struct
diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index 1e78c8410b217b..97b49765e8b5b7 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -459,11 +459,6 @@ static inline int mdiodev_modify_changed(struct mdio_device *mdiodev,
 				      mask, set);
 }
 
-static inline u32 mdiobus_c45_addr(int devad, u16 regnum)
-{
-	return MII_ADDR_C45 | devad << MII_DEVADDR_C45_SHIFT | regnum;
-}
-
 static inline u16 mdiobus_c45_regad(u32 regnum)
 {
 	return FIELD_GET(MII_REGADDR_C45_MASK, regnum);