[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>
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 2faa0d8..5aea911 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -554,7 +554,7 @@
{
struct inet_sock *inet = inet_sk(sk);
struct inet_sock *newinet;
- struct sock *newsk = sk_alloc(sk->sk_net, PF_INET, GFP_KERNEL,
+ struct sock *newsk = sk_alloc(sock_net(sk), PF_INET, GFP_KERNEL,
sk->sk_prot);
if (!newsk)