--- zzzz-none-000/linux-3.10.107/include/linux/fddidevice.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/include/linux/fddidevice.h	2021-02-04 17:41:59.000000000 +0000
@@ -25,10 +25,9 @@
 #include <linux/if_fddi.h>
 
 #ifdef __KERNEL__
-extern __be16	fddi_type_trans(struct sk_buff *skb,
-				struct net_device *dev);
-extern int fddi_change_mtu(struct net_device *dev, int new_mtu);
-extern struct net_device *alloc_fddidev(int sizeof_priv);
+__be16 fddi_type_trans(struct sk_buff *skb, struct net_device *dev);
+int fddi_change_mtu(struct net_device *dev, int new_mtu);
+struct net_device *alloc_fddidev(int sizeof_priv);
 #endif
 
 #endif	/* _LINUX_FDDIDEVICE_H */