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/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c
index f1ecf848e3ac..5a587cf6c86f 100644
--- a/net/netlabel/netlabel_unlabeled.c
+++ b/net/netlabel/netlabel_unlabeled.c
@@ -354,7 +354,7 @@ static struct netlbl_unlhsh_iface *netlbl_unlhsh_add_iface(int ifindex)
 		INIT_LIST_HEAD(&iface->list);
 		if (netlbl_unlhsh_rcu_deref(netlbl_unlhsh_def) != NULL)
 			goto add_iface_failure;
-		rcu_assign_pointer(netlbl_unlhsh_def, iface);
+		RCU_INIT_POINTER(netlbl_unlhsh_def, iface);
 	}
 	spin_unlock(&netlbl_unlhsh_lock);
 
@@ -621,7 +621,7 @@ static void netlbl_unlhsh_condremove_iface(struct netlbl_unlhsh_iface *iface)
 	if (iface->ifindex > 0)
 		list_del_rcu(&iface->list);
 	else
-		rcu_assign_pointer(netlbl_unlhsh_def, NULL);
+		RCU_INIT_POINTER(netlbl_unlhsh_def, NULL);
 	spin_unlock(&netlbl_unlhsh_lock);
 
 	call_rcu(&iface->rcu, netlbl_unlhsh_free_iface);
@@ -1449,7 +1449,7 @@ int __init netlbl_unlabel_init(u32 size)
 
 	rcu_read_lock();
 	spin_lock(&netlbl_unlhsh_lock);
-	rcu_assign_pointer(netlbl_unlhsh, hsh_tbl);
+	RCU_INIT_POINTER(netlbl_unlhsh, hsh_tbl);
 	spin_unlock(&netlbl_unlhsh_lock);
 	rcu_read_unlock();