[NET] NETNS: Omit sock->sk_net without CONFIG_NET_NS.

Introduce per-sock inlines: sock_net(), sock_net_set()
and per-inet_timewait_sock inlines: twsk_net(), twsk_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/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index c0c8d2d17682..21c467675412 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -105,7 +105,7 @@ struct sock *inet6_lookup_listener(struct net *net,
 
         read_lock(&hashinfo->lhash_lock);
         sk_for_each(sk, node, &hashinfo->listening_hash[inet_lhashfn(hnum)]) {
-                if (sk->sk_net == net && inet_sk(sk)->num == hnum &&
+                if (sock_net(sk) == net && inet_sk(sk)->num == hnum &&
                                 sk->sk_family == PF_INET6) {
                         const struct ipv6_pinfo *np = inet6_sk(sk);
 
@@ -172,7 +172,7 @@ static int __inet6_check_established(struct inet_timewait_death_row *death_row,
         struct sock *sk2;
         const struct hlist_node *node;
         struct inet_timewait_sock *tw;
-        struct net *net = sk->sk_net;
+        struct net *net = sock_net(sk);
 
         prefetch(head->chain.first);
         write_lock(lock);