net: Kill hold_net release_net

hold_net and release_net were an idea that turned out to be useless.
The code has been disabled since 2008.  Kill the code it is long past due.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 29 deletions

diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index e086f4030dd2..fab51ceeabf3 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -49,11 +49,6 @@ struct net {
         atomic_t                count;          /* To decided when the network
                                                  *  namespace should be shut down.
                                                  */
-#ifdef NETNS_REFCNT_DEBUG
-        atomic_t                use_count;      /* To track references we
-                                                 * destroy on demand
-                                                 */
-#endif
         spinlock_t              rules_mod_lock;
 
         atomic64_t              cookie_gen;
@@ -236,30 +231,6 @@ int net_eq(const struct net *net1, const struct net *net2)
 #endif
 
 
-#ifdef NETNS_REFCNT_DEBUG
-static inline struct net *hold_net(struct net *net)
-{
-        if (net)
-                atomic_inc(&net->use_count);
-        return net;
-}
-
-static inline void release_net(struct net *net)
-{
-        if (net)
-                atomic_dec(&net->use_count);
-}
-#else
-static inline struct net *hold_net(struct net *net)
-{
-        return net;
-}
-
-static inline void release_net(struct net *net)
-{
-}
-#endif
-
 #ifdef CONFIG_NET_NS
 
 static inline void write_pnet(struct net **pnet, struct net *net)