rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTER

When assigning a NULL value to an RCU protected pointer, no barrier
is needed. The rcu_assign_pointer, used to handle that but will soon
change to not handle the special case.

Convert all rcu_assign_pointer of NULL value.

//smpl
@@ expression P; @@

- rcu_assign_pointer(P, NULL)
+ RCU_INIT_POINTER(P, NULL)

// </smpl>

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/phonet/af_phonet.c b/net/phonet/af_phonet.c
index c6fffd946d42..bf10ea8fbbf9 100644
--- a/net/phonet/af_phonet.c
+++ b/net/phonet/af_phonet.c
@@ -480,7 +480,7 @@ int __init_or_module phonet_proto_register(unsigned int protocol,
         if (proto_tab[protocol])
                 err = -EBUSY;
         else
-                rcu_assign_pointer(proto_tab[protocol], pp);
+                RCU_INIT_POINTER(proto_tab[protocol], pp);
         mutex_unlock(&proto_tab_lock);
 
         return err;
@@ -491,7 +491,7 @@ void phonet_proto_unregister(unsigned int protocol, struct phonet_protocol *pp)
 {
         mutex_lock(&proto_tab_lock);
         BUG_ON(proto_tab[protocol] != pp);
-        rcu_assign_pointer(proto_tab[protocol], NULL);
+        RCU_INIT_POINTER(proto_tab[protocol], NULL);
         mutex_unlock(&proto_tab_lock);
         synchronize_rcu();
         proto_unregister(pp->prot);