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, 3 insertions, 14 deletions

diff --git a/net/core/fib_rules.c b/net/core/fib_rules.c
index b55677fed1c8..68ea6950cad1 100644
--- a/net/core/fib_rules.c
+++ b/net/core/fib_rules.c
@@ -31,7 +31,7 @@ int fib_default_rule_add(struct fib_rules_ops *ops,
         r->pref = pref;
         r->table = table;
         r->flags = flags;
-        r->fr_net = hold_net(ops->fro_net);
+        r->fr_net = ops->fro_net;
 
         r->suppress_prefixlen = -1;
         r->suppress_ifgroup = -1;
@@ -116,7 +116,6 @@ static int __fib_rules_register(struct fib_rules_ops *ops)
                 if (ops->family == o->family)
                         goto errout;
 
-        hold_net(net);
         list_add_tail_rcu(&ops->list, &net->rules_ops);
         err = 0;
 errout:
@@ -160,15 +159,6 @@ static void fib_rules_cleanup_ops(struct fib_rules_ops *ops)
         }
 }
 
-static void fib_rules_put_rcu(struct rcu_head *head)
-{
-        struct fib_rules_ops *ops = container_of(head, struct fib_rules_ops, rcu);
-        struct net *net = ops->fro_net;
-
-        release_net(net);
-        kfree(ops);
-}
-
 void fib_rules_unregister(struct fib_rules_ops *ops)
 {
         struct net *net = ops->fro_net;
@@ -178,7 +168,7 @@ void fib_rules_unregister(struct fib_rules_ops *ops)
         fib_rules_cleanup_ops(ops);
         spin_unlock(&net->rules_mod_lock);
 
-        call_rcu(&ops->rcu, fib_rules_put_rcu);
+        kfree_rcu(ops, rcu);
 }
 EXPORT_SYMBOL_GPL(fib_rules_unregister);
 
@@ -303,7 +293,7 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh)
                 err = -ENOMEM;
                 goto errout;
         }
-        rule->fr_net = hold_net(net);
+        rule->fr_net = net;
 
         if (tb[FRA_PRIORITY])
                 rule->pref = nla_get_u32(tb[FRA_PRIORITY]);
@@ -423,7 +413,6 @@ static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh)
         return 0;
 
 errout_free:
-        release_net(rule->fr_net);
         kfree(rule);
 errout:
         rules_ops_put(ops);