tcp: cleanup static functions

tcp_fastopen_create_child() is static and should not be exported.

tcp4_gso_segment() and tcp6_gso_segment() should be static.

Signed-off-by: Eric Dumazet <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/ipv4/tcp_fastopen.c

···
 	WARN_ON(req->sk == NULL);
 	return true;
 }
-EXPORT_SYMBOL(tcp_fastopen_create_child);
 
 static bool tcp_fastopen_queue_check(struct sock *sk)
 {

net/ipv4/tcp_offload.c

···
 	}
 }
 
-struct sk_buff *tcp4_gso_segment(struct sk_buff *skb,
-				 netdev_features_t features)
+static struct sk_buff *tcp4_gso_segment(struct sk_buff *skb,
+					netdev_features_t features)
 {
 	if (!pskb_may_pull(skb, sizeof(struct tcphdr)))
 		return ERR_PTR(-EINVAL);

net/ipv6/tcpv6_offload.c

···
 	return tcp_gro_complete(skb);
 }
 
-struct sk_buff *tcp6_gso_segment(struct sk_buff *skb,
-				 netdev_features_t features)
+static struct sk_buff *tcp6_gso_segment(struct sk_buff *skb,
+					netdev_features_t features)
 {
 	struct tcphdr *th;