net: don't use INIT_RCU_HEAD

call_rcu() will unconditionally rewrite RCU head anyway.
Applies to 
	struct neigh_parms
	struct neigh_table
	struct net
	struct cipso_v4_doi
	struct in_ifaddr
	struct in_device
	rt->u.dst

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 0 insertions, 4 deletions

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 1dc728b38589..b337a937ea52 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1340,7 +1340,6 @@ struct neigh_parms *neigh_parms_alloc(struct net_device *dev,
         if (p) {
                 p->tbl            = tbl;
                 atomic_set(&p->refcnt, 1);
-                INIT_RCU_HEAD(&p->rcu_head);
                 p->reachable_time =
                                 neigh_rand_reach_time(p->base_reachable_time);
 
@@ -1412,7 +1411,6 @@ void neigh_table_init_no_netlink(struct neigh_table *tbl)
         tbl->parms.net = &init_net;
 #endif
         atomic_set(&tbl->parms.refcnt, 1);
-        INIT_RCU_HEAD(&tbl->parms.rcu_head);
         tbl->parms.reachable_time =
                           neigh_rand_reach_time(tbl->parms.base_reachable_time);
 
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index f1d07b5c1e17..861b4cbf40db 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -47,7 +47,6 @@ static __net_init int setup_net(struct net *net)
                 goto out;
 
         ng->len = INITIAL_NET_GEN_PTRS;
-        INIT_RCU_HEAD(&ng->rcu);
         rcu_assign_pointer(net->gen, ng);
 
         error = 0;
@@ -446,7 +445,6 @@ int net_assign_generic(struct net *net, int id, void *data)
          */
 
         ng->len = id;
-        INIT_RCU_HEAD(&ng->rcu);
         memcpy(&ng->ptr, &old_ng->ptr, old_ng->len);
 
         rcu_assign_pointer(net->gen, ng);