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: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/tcp_fastopen.c

@@ -221,7 +221,6 @@ static bool tcp_fastopen_create_child(struct sock *sk,
 	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

@@ -29,8 +29,8 @@ static void tcp_gso_tstamp(struct sk_buff *skb, unsigned int ts_seq,
 	}
 }
 
-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

@@ -41,8 +41,8 @@ static int tcp6_gro_complete(struct sk_buff *skb, int thoff)
 	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;