[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, 1 insertions, 1 deletions

diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 7d63d74ef62a..e54bc1364473 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -1089,7 +1089,7 @@ static int ipmr_device_event(struct notifier_block *this, unsigned long event, v
         struct vif_device *v;
         int ct;
 
-        if (dev->nd_net != &init_net)
+        if (dev_net(dev) != &init_net)
                 return NOTIFY_DONE;
 
         if (event != NETDEV_UNREGISTER)