diff options
| author |   Peter Pan(潘卫平) <panweiping3@gmail.com> | 2014-09-24 22:17:02 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-09-28 16:37:57 -0400 |
| commit | 155c6e1ad4a778cad7f9fe6695afc91b3f5fe1ac (patch) | |
| tree | f769a4d224724a1de9f99c85e45322b9d7e29ddc /net/ipv4/tcp_input.c | |
| parent | tcp: change tcp_skb_pcount() location (diff) | |
| download | linux-dev-155c6e1ad4a778cad7f9fe6695afc91b3f5fe1ac.tar.xz linux-dev-155c6e1ad4a778cad7f9fe6695afc91b3f5fe1ac.zip | |
tcp: use tcp_flags in tcp_data_queue()
This patch is a cleanup which follows the idea in commit e11ecddf5128 (tcp: use
TCP_SKB_CB(skb)->tcp_flags in input path),
and it may reduce register pressure since skb->cb[] access is fast,
bacause skb is probably in a register.
v2: remove variable th
v3: reword the changelog
Signed-off-by: Weiping Pan <panweiping3@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 2c0af90231cf..5073eefa6fae 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -4344,7 +4344,6 @@ err: static void tcp_data_queue(struct sock *sk, struct sk_buff *skb) { - const struct tcphdr *th = tcp_hdr(skb); struct tcp_sock *tp = tcp_sk(sk); int eaten = -1; bool fragstolen = false; @@ -4353,7 +4352,7 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb) goto drop; skb_dst_drop(skb); - __skb_pull(skb, th->doff * 4); + __skb_pull(skb, tcp_hdr(skb)->doff * 4); TCP_ECN_accept_cwr(tp, skb); @@ -4397,7 +4396,7 @@ queue_and_out: tp->rcv_nxt = TCP_SKB_CB(skb)->end_seq; if (skb->len) tcp_event_data_recv(sk, skb); - if (th->fin) + if (TCP_SKB_CB(skb)->tcp_flags & TCPHDR_FIN) tcp_fin(sk); if (!skb_queue_empty(&tp->out_of_order_queue)) { |