--- zzzz-none-000/linux-3.10.107/include/net/icmp.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/include/net/icmp.h	2021-02-04 17:41:59.000000000 +0000
@@ -39,10 +39,10 @@
 struct sk_buff;
 struct net;
 
-extern void	icmp_send(struct sk_buff *skb_in,  int type, int code, __be32 info);
-extern int	icmp_rcv(struct sk_buff *skb);
-extern void	icmp_err(struct sk_buff *, u32 info);
-extern int	icmp_init(void);
-extern void	icmp_out_count(struct net *net, unsigned char type);
+void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info);
+int icmp_rcv(struct sk_buff *skb);
+void icmp_err(struct sk_buff *skb, u32 info);
+int icmp_init(void);
+void icmp_out_count(struct net *net, unsigned char type);
 
 #endif	/* _ICMP_H */