netdev - Re: [net-next:master 90/102] net/ipv4/route.c:1283:9: warning: unused variable 'saddr'

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Message-Id: <20120712.074058.753681400854318989.davem@davemloft.net>
Date:	Thu, 12 Jul 2012 07:40:58 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	fengguang.wu@...el.com
Cc:	kernel-janitors@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [net-next:master 90/102] net/ipv4/route.c:1283:9: warning:
 unused variable 'saddr'


There's not need to report these to kernel-janitors if it's a
net-next specific issue and I'm going to fix it up 5 minutes
after you report it.

====================
[PATCH] ipv4: Fix warnings in ip_do_redirect() for some configurations.

Reported-by: Fengguang Wu <fengguang.wu@...el.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
---
 net/ipv4/route.c |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 23bbe29..9319bf1 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1275,12 +1275,9 @@ static void rt_del(unsigned int hash, struct rtable *rt)
 
 static void ip_do_redirect(struct dst_entry *dst, struct sk_buff *skb)
 {
-	const struct iphdr *iph = (const struct iphdr *) skb->data;
 	__be32 new_gw = icmp_hdr(skb)->un.gateway;
 	__be32 old_gw = ip_hdr(skb)->saddr;
 	struct net_device *dev = skb->dev;
-	__be32 daddr = iph->daddr;
-	__be32 saddr = iph->saddr;
 	struct in_device *in_dev;
 	struct neighbour *n;
 	struct rtable *rt;
@@ -1336,11 +1333,16 @@ static void ip_do_redirect(struct dst_entry *dst, struct sk_buff *skb)
 
 reject_redirect:
 #ifdef CONFIG_IP_ROUTE_VERBOSE
-	if (IN_DEV_LOG_MARTIANS(in_dev))
+	if (IN_DEV_LOG_MARTIANS(in_dev)) {
+		const struct iphdr *iph = (const struct iphdr *) skb->data;
+		__be32 daddr = iph->daddr;
+		__be32 saddr = iph->saddr;
+
 		net_info_ratelimited("Redirect from %pI4 on %s about %pI4 ignored\n"
 				     "  Advised path = %pI4 -> %pI4\n",
 				     &old_gw, dev->name, &new_gw,
 				     &saddr, &daddr);
+	}
 #endif
 	;
 }
-- 
1.7.10.4

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