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Date:	Mon, 21 Apr 2014 21:17:57 +0800
Subject: [PATCH][net-next] tcp: remove the duplicate prefixes in the logging message

From: Li RongQing <>

The current message is:
	TCP: TCP: Possible SYN flooding on port 80. Sending cookies. ...

The cause is that pr_info will implicitly print the pr_fmt string, which is standard
prefix, and explicitly print the "proto" which is "TCP:" too

it is unsuitable to not print proto, since proto maybe TCPv6, so use printk directly.

Cc: Joe Perches <>
Signed-off-by: Li RongQing <>
 net/ipv4/tcp_ipv4.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 6379894..370fa46 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -892,8 +892,8 @@ bool tcp_syn_flood_action(struct sock *sk,
 	lopt = inet_csk(sk)->icsk_accept_queue.listen_opt;
 	if (!lopt->synflood_warned && sysctl_tcp_syncookies != 2) {
 		lopt->synflood_warned = 1;
-		pr_info("%s: Possible SYN flooding on port %d. %s.  Check SNMP counters.\n",
-			proto, ntohs(tcp_hdr(skb)->dest), msg);
+		printk(KERN_INFO "%s: Possible SYN flooding on port %d. %s. Check SNMP counters.\n"
+		       proto, ntohs(tcp_hdr(skb)->dest), msg);
 	return want_cookie;

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