[TCP]: Don't set SKB owner in tcp_transmit_skb().

The data itself is already charged to the SKB, doing
the skb_set_owner_w() just generates a lot of noise and
extra atomics we don't really need.

Lmbench improvements on lat_tcp are minimal:

before:
TCP latency using localhost: 23.2701 microseconds
TCP latency using localhost: 23.1994 microseconds
TCP latency using localhost: 23.2257 microseconds

after:
TCP latency using localhost: 22.8380 microseconds
TCP latency using localhost: 22.9465 microseconds
TCP latency using localhost: 22.8462 microseconds

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/dccp/output.c b/net/dccp/output.c
index 7102e3aed4ca..2cc4f4b2a9dd 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -125,7 +125,7 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
                 DCCP_INC_STATS(DCCP_MIB_OUTSEGS);
 
                 memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
-                err = icsk->icsk_af_ops->queue_xmit(skb, 0);
+                err = icsk->icsk_af_ops->queue_xmit(skb, sk, 0);
                 if (err <= 0)
                         return err;
 
@@ -426,7 +426,7 @@ int dccp_send_reset(struct sock *sk, enum dccp_reset_codes code)
                                                       code);
                 if (skb != NULL) {
                         memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
-                        err = inet_csk(sk)->icsk_af_ops->queue_xmit(skb, 0);
+                        err = inet_csk(sk)->icsk_af_ops->queue_xmit(skb, sk, 0);
                         if (err == NET_XMIT_CN)
                                 err = 0;
                 }