ipv4: Cache net in iptunnel_xmit

Store net in a variable in ip_tunnel_xmit so it does not need
to be recomputed when it is used again.

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

diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c
index 8d85ecd1ced5fee9af70a9293c5fd75d3606a268..caef8e2c281dbacc70821bf4360ab1d12427c4f2 100644 (file)
--- a/net/ipv4/ip_tunnel_core.c
+++ b/net/ipv4/ip_tunnel_core.c
@@ -53,6 +53,7 @@ int iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb,
                  __u8 tos, __u8 ttl, __be16 df, bool xnet)
 {
        int pkt_len = skb->len - skb_inner_network_offset(skb);
+       struct net *net = dev_net(rt->dst.dev);
        struct iphdr *iph;
        int err;
 
@@ -76,8 +77,7 @@ int iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb,
        iph->daddr      =       dst;
        iph->saddr      =       src;
        iph->ttl        =       ttl;
-       __ip_select_ident(dev_net(rt->dst.dev), iph,
-                         skb_shinfo(skb)->gso_segs ?: 1);
+       __ip_select_ident(net, iph, skb_shinfo(skb)->gso_segs ?: 1);
 
        err = ip_local_out(sk, skb);
        if (unlikely(net_xmit_eval(err)))