tcp: avoid indirect call in tcp_new_space()

For tcp sockets, sk->sk_write_space is most probably sk_stream_write_space().

Other sk->sk_write_space() calls in TCP are slow path and do not deserve
any change.

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

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 149ceb5..bef2c8b 100644 (file)
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -5383,7 +5383,7 @@ static void tcp_new_space(struct sock *sk)
                tp->snd_cwnd_stamp = tcp_jiffies32;
        }
 
-       sk->sk_write_space(sk);
+       INDIRECT_CALL_1(sk->sk_write_space, sk_stream_write_space, sk);
 }
 
 static void tcp_check_space(struct sock *sk)