linux-kernel - [PATCH net-next 1/2] tcp: remove redundant rcv

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Message-Id: <1531315019-3553-1-git-send-email-laoar.shao@gmail.com>
Date:   Wed, 11 Jul 2018 09:16:58 -0400
From:   Yafang Shao <laoar.shao@...il.com>
To:     davem@...emloft.net, edumazet@...gle.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        shaoyafang@...ichuxing.com, Yafang Shao <laoar.shao@...il.com>
Subject: [PATCH net-next 1/2] tcp: remove redundant rcv_nxt update

tcp_rcv_nxt_update() is already executed in tcp_data_queue().
This line is redundant.

See bellow,
	tcp_queue_rcv
		tcp_rcv_nxt_update(tcp_sk(sk), TCP_SKB_CB(skb)->end_seq);
	tcp_rcv_nxt_update(tp, TCP_SKB_CB(skb)->end_seq); <<<< redundant

Signed-off-by: Yafang Shao <laoar.shao@...il.com>
---
 net/ipv4/tcp_input.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 814ea43..3a54faf 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4695,7 +4695,6 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb)
 		}
 
 		eaten = tcp_queue_rcv(sk, skb, 0, &fragstolen);
-		tcp_rcv_nxt_update(tp, TCP_SKB_CB(skb)->end_seq);
 		if (skb->len)
 			tcp_event_data_recv(sk, skb);
 		if (TCP_SKB_CB(skb)->tcp_flags & TCPHDR_FIN)
-- 
1.8.3.1