commit 26a949dbd5595b987bf199be4442136e9288a93e
author Eric W. Biederman <ebiederm@xmission.com> Tue Sep 15 20:03:59 2015 -0500
committer David S. Miller <davem@davemloft.net> Thu Sep 17 17:18:34 2015 -0700
tree 03c46ef5d85dd7718f8386b9b3542c3d90bec754
parent cc4c851e4b41d668075d7cb6c71e3725bc5d4662

ipv4: Only compute net once in ip_do_fragment

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/ip_output.c

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 9ee622a..85b72d4 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -531,9 +531,11 @@
 	int offset;
 	__be16 not_last_frag;
 	struct rtable *rt = skb_rtable(skb);
+	struct net *net;
 	int err = 0;
 
 	dev = rt->dst.dev;
+	net = dev_net(dev);
 
 	/*
 	 *	Point into the IP datagram header.
@@ -626,7 +628,7 @@
 			err = output(sk, skb);
 
 			if (!err)
-				IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGCREATES);
+				IP_INC_STATS(net, IPSTATS_MIB_FRAGCREATES);
 			if (err || !frag)
 				break;
 
@@ -636,7 +638,7 @@
 		}
 
 		if (err == 0) {
-			IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGOKS);
+			IP_INC_STATS(net, IPSTATS_MIB_FRAGOKS);
 			return 0;
 		}
 
@@ -645,7 +647,7 @@
 			kfree_skb(frag);
 			frag = skb;
 		}
-		IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGFAILS);
+		IP_INC_STATS(net, IPSTATS_MIB_FRAGFAILS);
 		return err;
 
 slow_path_clean:
@@ -767,15 +769,15 @@
 		if (err)
 			goto fail;
 
-		IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGCREATES);
+		IP_INC_STATS(net, IPSTATS_MIB_FRAGCREATES);
 	}
 	consume_skb(skb);
-	IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGOKS);
+	IP_INC_STATS(net, IPSTATS_MIB_FRAGOKS);
 	return err;
 
 fail:
 	kfree_skb(skb);
-	IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGFAILS);
+	IP_INC_STATS(net, IPSTATS_MIB_FRAGFAILS);
 	return err;
 }
 EXPORT_SYMBOL(ip_do_fragment);