diff options
| author | Eric Dumazet <[email protected]> | 2020-06-19 19:12:35 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2020-06-21 00:47:53 +0000 |
| commit | dd2e0b86fc4ee146ac8f3275833d0187efeb950a (patch) | |
| tree | 6c91f581ec5db35d4d77554be9d293b2ae57a776 /net/ipv4/tcp_output.c | |
| parent | tcp: remove indirect calls for icsk->icsk_af_ops->queue_xmit (diff) | |
| download | kernel-dd2e0b86fc4ee146ac8f3275833d0187efeb950a.tar.gz kernel-dd2e0b86fc4ee146ac8f3275833d0187efeb950a.zip | |
tcp: remove indirect calls for icsk->icsk_af_ops->send_check
Mitigate RETPOLINE costs in __tcp_transmit_skb()
by using INDIRECT_CALL_INET() wrapper.
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'net/ipv4/tcp_output.c')
| -rw-r--r-- | net/ipv4/tcp_output.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index be1bd37185d8..04b70fe31fa2 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -1066,6 +1066,7 @@ static void tcp_update_skb_after_send(struct sock *sk, struct sk_buff *skb, INDIRECT_CALLABLE_DECLARE(int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl)); INDIRECT_CALLABLE_DECLARE(int inet6_csk_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl)); +INDIRECT_CALLABLE_DECLARE(void tcp_v4_send_check(struct sock *sk, struct sk_buff *skb)); /* This routine actually transmits TCP packets queued in by * tcp_do_sendmsg(). This is used by both the initial @@ -1210,7 +1211,9 @@ static int __tcp_transmit_skb(struct sock *sk, struct sk_buff *skb, } #endif - icsk->icsk_af_ops->send_check(sk, skb); + INDIRECT_CALL_INET(icsk->icsk_af_ops->send_check, + tcp_v6_send_check, tcp_v4_send_check, + sk, skb); if (likely(tcb->tcp_flags & TCPHDR_ACK)) tcp_event_ack_sent(sk, tcp_skb_pcount(skb), rcv_nxt); |