[PATCH v3 net-next 2/2] tcp: minor optimization around tcp_hdr() usage in tcp receive path

[Yafang Shao]

This is additional to the commit ea1627c20c34 ("tcp: minor optimizations around 
tcp_hdr() usage").
At this point, skb->data is same with tcp_hdr() as tcp header has not
been pulled yet.

Cc: Eric Dumazet <eduma...@google.com>
Signed-off-by: Yafang Shao <laoar.s...@gmail.com>
---
 net/ipv4/tcp_ipv4.c | 2 +-
 net/ipv6/tcp_ipv6.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index adbdb50..d179386 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1486,7 +1486,7 @@ int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
                                sk->sk_rx_dst = NULL;
                        }
                }
-               tcp_rcv_established(sk, skb, tcp_hdr(skb));
+               tcp_rcv_established(sk, skb, (const struct tcphdr *)skb->data);
                return 0;
        }
 
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 7d47c2b..1c633ff 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1322,7 +1322,7 @@ static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff 
*skb)
                        }
                }
 
-               tcp_rcv_established(sk, skb, tcp_hdr(skb));
+               tcp_rcv_established(sk, skb, (const struct tcphdr *)skb->data);
                if (opt_skb)
                        goto ipv6_pktoptions;
                return 0;
-- 
1.8.3.1