net: ib_net pointer should depends on CONFIG_NET_NS

We can shrink size of "struct inet_bind_bucket" by 50%, using
read_pnet() and write_pnet()

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index 5cc182f9eca..cb31fbf8ae2 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -77,13 +77,20 @@ struct inet_ehash_bucket {
  * ports are created in O(1) time?  I thought so. ;-)   -DaveM
  */
 struct inet_bind_bucket {
+#ifdef CONFIG_NET_NS
         struct net              *ib_net;
+#endif
         unsigned short          port;
         signed short            fastreuse;
         struct hlist_node       node;
         struct hlist_head       owners;
 };
 
+static inline struct net *ib_net(struct inet_bind_bucket *ib)
+{
+        return read_pnet(&ib->ib_net);
+}
+
 #define inet_bind_bucket_for_each(tb, node, head) \
         hlist_for_each_entry(tb, node, head, node)