diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index d7aee90e5da5..4924d8038814 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -118,21 +118,20 @@ struct mdev_driver {
 
 #define to_mdev_driver(drv)	container_of(drv, struct mdev_driver, driver)
 
-extern void *mdev_get_drvdata(struct mdev_device *mdev);
-extern void mdev_set_drvdata(struct mdev_device *mdev, void *data);
-extern const guid_t *mdev_uuid(struct mdev_device *mdev);
+void *mdev_get_drvdata(struct mdev_device *mdev);
+void mdev_set_drvdata(struct mdev_device *mdev, void *data);
+const guid_t *mdev_uuid(struct mdev_device *mdev);
 
 extern struct bus_type mdev_bus_type;
 
-extern int  mdev_register_device(struct device *dev,
-				 const struct mdev_parent_ops *ops);
-extern void mdev_unregister_device(struct device *dev);
+int mdev_register_device(struct device *dev, const struct mdev_parent_ops *ops);
+void mdev_unregister_device(struct device *dev);
 
-extern int  mdev_register_driver(struct mdev_driver *drv, struct module *owner);
-extern void mdev_unregister_driver(struct mdev_driver *drv);
+int mdev_register_driver(struct mdev_driver *drv, struct module *owner);
+void mdev_unregister_driver(struct mdev_driver *drv);
 
-extern struct device *mdev_parent_dev(struct mdev_device *mdev);
-extern struct device *mdev_dev(struct mdev_device *mdev);
-extern struct mdev_device *mdev_from_dev(struct device *dev);
+struct device *mdev_parent_dev(struct mdev_device *mdev);
+struct device *mdev_dev(struct mdev_device *mdev);
+struct mdev_device *mdev_from_dev(struct device *dev);
 
 #endif /* MDEV_H */