[NET] NETNS: Omit net_device->nd_net without CONFIG_NET_NS.

Introduce per-net_device inlines: dev_net(), dev_net_set().
Without CONFIG_NET_NS, no namespace other than &init_net exists.
Let's explicitly define them to help compiler optimizations.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index b37581dfd029..e2cd93481359 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -357,7 +357,7 @@ void __udp4_lib_err(struct sk_buff *skb, u32 info, struct hlist_head udptable[])
         int harderr;
         int err;
 
-        sk = __udp4_lib_lookup(skb->dev->nd_net, iph->daddr, uh->dest,
+        sk = __udp4_lib_lookup(dev_net(skb->dev), iph->daddr, uh->dest,
                         iph->saddr, uh->source, skb->dev->ifindex, udptable);
         if (sk == NULL) {
                 ICMP_INC_STATS_BH(ICMP_MIB_INERRORS);
@@ -1181,7 +1181,7 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
         if (rt->rt_flags & (RTCF_BROADCAST|RTCF_MULTICAST))
                 return __udp4_lib_mcast_deliver(skb, uh, saddr, daddr, udptable);
 
-        sk = __udp4_lib_lookup(skb->dev->nd_net, saddr, uh->source, daddr,
+        sk = __udp4_lib_lookup(dev_net(skb->dev), saddr, uh->source, daddr,
                         uh->dest, inet_iif(skb), udptable);
 
         if (sk != NULL) {