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/can/af_can.c b/net/can/af_can.c
index 8ce926d..b9efa94 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -719,7 +719,7 @@
proto);
err = -EBUSY;
} else
- rcu_assign_pointer(proto_tab[proto], cp);
+ RCU_INIT_POINTER(proto_tab[proto], cp);
mutex_unlock(&proto_tab_lock);
@@ -740,7 +740,7 @@
mutex_lock(&proto_tab_lock);
BUG_ON(proto_tab[proto] != cp);
- rcu_assign_pointer(proto_tab[proto], NULL);
+ RCU_INIT_POINTER(proto_tab[proto], NULL);
mutex_unlock(&proto_tab_lock);
synchronize_rcu();