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>

3 files changed, 8 insertions, 8 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);
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);
diff --git a/net/phonet/socket.c b/net/phonet/socket.c
index ab07711cf2f4..676d18dc75b7 100644
--- a/net/phonet/socket.c
+++ b/net/phonet/socket.c
@@ -679,7 +679,7 @@ int pn_sock_bind_res(struct sock *sk, u8 res)
         mutex_lock(&resource_mutex);
         if (pnres.sk[res] == NULL) {
                 sock_hold(sk);
-                rcu_assign_pointer(pnres.sk[res], sk);
+                RCU_INIT_POINTER(pnres.sk[res], sk);
                 ret = 0;
         }
         mutex_unlock(&resource_mutex);
@@ -695,7 +695,7 @@ int pn_sock_unbind_res(struct sock *sk, u8 res)
 
         mutex_lock(&resource_mutex);
         if (pnres.sk[res] == sk) {
-                rcu_assign_pointer(pnres.sk[res], NULL);
+                RCU_INIT_POINTER(pnres.sk[res], NULL);
                 ret = 0;
         }
         mutex_unlock(&resource_mutex);
@@ -714,7 +714,7 @@ void pn_sock_unbind_all_res(struct sock *sk)
         mutex_lock(&resource_mutex);
         for (res = 0; res < 256; res++) {
                 if (pnres.sk[res] == sk) {
-                        rcu_assign_pointer(pnres.sk[res], NULL);
+                        RCU_INIT_POINTER(pnres.sk[res], NULL);
                         match++;
                 }
         }