[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, 6 insertions, 6 deletions

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 86ff2711fc95..0e4b34b07cb5 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -257,7 +257,7 @@ int fib_validate_source(__be32 src, __be32 dst, u8 tos, int oif,
         if (in_dev == NULL)
                 goto e_inval;
 
-        net = dev->nd_net;
+        net = dev_net(dev);
         if (fib_lookup(net, &fl, &res))
                 goto last_resort;
         if (res.type != RTN_UNICAST)
@@ -674,7 +674,7 @@ out:
 
 static void fib_magic(int cmd, int type, __be32 dst, int dst_len, struct in_ifaddr *ifa)
 {
-        struct net *net = ifa->ifa_dev->dev->nd_net;
+        struct net *net = dev_net(ifa->ifa_dev->dev);
         struct fib_table *tb;
         struct fib_config cfg = {
                 .fc_protocol = RTPROT_KERNEL,
@@ -801,15 +801,15 @@ static void fib_del_ifaddr(struct in_ifaddr *ifa)
                 fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 32, prim);
 
                 /* Check, that this local address finally disappeared. */
-                if (inet_addr_type(dev->nd_net, ifa->ifa_local) != RTN_LOCAL) {
+                if (inet_addr_type(dev_net(dev), ifa->ifa_local) != RTN_LOCAL) {
                         /* And the last, but not the least thing.
                            We must flush stray FIB entries.
 
                            First of all, we scan fib_info list searching
                            for stray nexthop entries, then ignite fib_flush.
                         */
-                        if (fib_sync_down_addr(dev->nd_net, ifa->ifa_local))
-                                fib_flush(dev->nd_net);
+                        if (fib_sync_down_addr(dev_net(dev), ifa->ifa_local))
+                                fib_flush(dev_net(dev));
                 }
         }
 #undef LOCAL_OK
@@ -899,7 +899,7 @@ static void nl_fib_lookup_exit(struct net *net)
 static void fib_disable_ip(struct net_device *dev, int force)
 {
         if (fib_sync_down_dev(dev, force))
-                fib_flush(dev->nd_net);
+                fib_flush(dev_net(dev));
         rt_cache_flush(0);
         arp_ifdown(dev);
 }