[NET] NETNS: Omit neigh_parms->net and pneigh_entry->net without CONFIG_NET_NS.

Introduce neigh_parms/pneigh_entry inlines: neigh_parms_net(), pneigh_net().
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, 25 insertions, 0 deletions

diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 062281872064..8bec0d69b270 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -38,7 +38,9 @@ struct neighbour;
 
 struct neigh_parms
 {
+#ifdef CONFIG_NET_NS
         struct net *net;
+#endif
         struct net_device *dev;
         struct neigh_parms *next;
         int     (*neigh_setup)(struct neighbour *);
@@ -131,7 +133,9 @@ struct neigh_ops
 struct pneigh_entry
 {
         struct pneigh_entry     *next;
+#ifdef CONFIG_NET_NS
         struct net              *net;
+#endif
         struct net_device       *dev;
         u8                      flags;
         u8                      key[0];
@@ -213,6 +217,17 @@ extern struct neighbour 	*neigh_event_ns(struct neigh_table *tbl,
 
 extern struct neigh_parms       *neigh_parms_alloc(struct net_device *dev, struct neigh_table *tbl);
 extern void                     neigh_parms_release(struct neigh_table *tbl, struct neigh_parms *parms);
+
+static inline
+struct net                      *neigh_parms_net(const struct neigh_parms *parms)
+{
+#ifdef CONFIG_NET_NS
+        return parms->net;
+#else
+        return &init_net;
+#endif
+}
+
 extern unsigned long            neigh_rand_reach_time(unsigned long base);
 
 extern void                     pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p,
@@ -220,6 +235,16 @@ extern void			pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p,
 extern struct pneigh_entry      *pneigh_lookup(struct neigh_table *tbl, struct net *net, const void *key, struct net_device *dev, int creat);
 extern int                      pneigh_delete(struct neigh_table *tbl, struct net *net, const void *key, struct net_device *dev);
 
+static inline
+struct net                      *pneigh_net(const struct pneigh_entry *pneigh)
+{
+#ifdef CONFIG_NET_NS
+        return pneigh->net;
+#else
+        return &init_net;
+#endif
+}
+
 extern void neigh_app_ns(struct neighbour *n);
 extern void neigh_for_each(struct neigh_table *tbl, void (*cb)(struct neighbour *, void *), void *cookie);
 extern void __neigh_for_each_release(struct neigh_table *tbl, int (*cb)(struct neighbour *));