[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/sched/act_api.c b/net/sched/act_api.c
index 0b8eb235bc13..74e662cbb2c5 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -951,7 +951,7 @@ done:
 
 static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct nlattr *tca[TCA_ACT_MAX + 1];
         u32 pid = skb ? NETLINK_CB(skb).pid : 0;
         int ret = 0, ovr = 0;
@@ -1029,7 +1029,7 @@ find_dump_kind(struct nlmsghdr *n)
 static int
 tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
 {
-        struct net *net = skb->sk->sk_net;
+        struct net *net = sock_net(skb->sk);
         struct nlmsghdr *nlh;
         unsigned char *b = skb_tail_pointer(skb);
         struct nlattr *nest;