--- zzzz-none-000/linux-2.6.39.4/include/linux/tcp.h	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/include/linux/tcp.h	2021-11-10 13:23:10.000000000 +0000
@@ -491,4 +491,7 @@
 
 #endif	/* __KERNEL__ */
 
+int tcp_skb_shift(struct sk_buff *to, struct sk_buff *from, int pcount,
+		  int shiftlen);
+
 #endif	/* _LINUX_TCP_H */