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, 3 insertions, 3 deletions

diff --git a/net/phonet/pn_dev.c b/net/phonet/pn_dev.c
index d2df8f33160b..c5827614376b 100644
--- a/net/phonet/pn_dev.c
+++ b/net/phonet/pn_dev.c
@@ -276,7 +276,7 @@ static void phonet_route_autodel(struct net_device *dev)
         mutex_lock(&pnn->routes.lock);
         for (i = 0; i < 64; i++)
                 if (dev == pnn->routes.table[i]) {
-                        rcu_assign_pointer(pnn->routes.table[i], NULL);
+                        RCU_INIT_POINTER(pnn->routes.table[i], NULL);
                         set_bit(i, deleted);
                 }
         mutex_unlock(&pnn->routes.lock);
@@ -390,7 +390,7 @@ int phonet_route_add(struct net_device *dev, u8 daddr)
         daddr = daddr >> 2;
         mutex_lock(&routes->lock);
         if (routes->table[daddr] == NULL) {
-                rcu_assign_pointer(routes->table[daddr], dev);
+                RCU_INIT_POINTER(routes->table[daddr], dev);
                 dev_hold(dev);
                 err = 0;
         }
@@ -406,7 +406,7 @@ int phonet_route_del(struct net_device *dev, u8 daddr)
         daddr = daddr >> 2;
         mutex_lock(&routes->lock);
         if (dev == routes->table[daddr])
-                rcu_assign_pointer(routes->table[daddr], NULL);
+                RCU_INIT_POINTER(routes->table[daddr], NULL);
         else
                 dev = NULL;
         mutex_unlock(&routes->lock);