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>
diff --git a/net/socket.c b/net/socket.c
index b1cbbcd..7ec8f9b 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2463,7 +2463,7 @@
lockdep_is_held(&net_family_lock)))
err = -EEXIST;
else {
- rcu_assign_pointer(net_families[ops->family], ops);
+ RCU_INIT_POINTER(net_families[ops->family], ops);
err = 0;
}
spin_unlock(&net_family_lock);
@@ -2491,7 +2491,7 @@
BUG_ON(family < 0 || family >= NPROTO);
spin_lock(&net_family_lock);
- rcu_assign_pointer(net_families[family], NULL);
+ RCU_INIT_POINTER(net_families[family], NULL);
spin_unlock(&net_family_lock);
synchronize_rcu();