[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, 3 insertions, 3 deletions

diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 2aeea5d15425..26685c83a146 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -172,7 +172,7 @@ int ip_call_ra_chain(struct sk_buff *skb)
                 if (sk && inet_sk(sk)->num == protocol &&
                     (!sk->sk_bound_dev_if ||
                      sk->sk_bound_dev_if == dev->ifindex) &&
-                    sk->sk_net == dev->nd_net) {
+                    sk->sk_net == dev_net(dev)) {
                         if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
                                 if (ip_defrag(skb, IP_DEFRAG_CALL_RA_CHAIN)) {
                                         read_unlock(&ip_ra_lock);
@@ -199,7 +199,7 @@ int ip_call_ra_chain(struct sk_buff *skb)
 
 static int ip_local_deliver_finish(struct sk_buff *skb)
 {
-        struct net *net = skb->dev->nd_net;
+        struct net *net = dev_net(skb->dev);
 
         __skb_pull(skb, ip_hdrlen(skb));
 
@@ -291,7 +291,7 @@ static inline int ip_rcv_options(struct sk_buff *skb)
         opt = &(IPCB(skb)->opt);
         opt->optlen = iph->ihl*4 - sizeof(struct iphdr);
 
-        if (ip_options_compile(dev->nd_net, opt, skb)) {
+        if (ip_options_compile(dev_net(dev), opt, skb)) {
                 IP_INC_STATS_BH(IPSTATS_MIB_INHDRERRORS);
                 goto drop;
         }