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/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 6fb1fb3..694d70a 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -218,8 +218,8 @@
{
struct ip6_tnl __rcu **tp = ip6_tnl_bucket(ip6n, &t->parms);
- rcu_assign_pointer(t->next , rtnl_dereference(*tp));
- rcu_assign_pointer(*tp, t);
+ RCU_INIT_POINTER(t->next , rtnl_dereference(*tp));
+ RCU_INIT_POINTER(*tp, t);
}
/**
@@ -237,7 +237,7 @@
(iter = rtnl_dereference(*tp)) != NULL;
tp = &iter->next) {
if (t == iter) {
- rcu_assign_pointer(*tp, t->next);
+ RCU_INIT_POINTER(*tp, t->next);
break;
}
}
@@ -350,7 +350,7 @@
struct ip6_tnl_net *ip6n = net_generic(net, ip6_tnl_net_id);
if (dev == ip6n->fb_tnl_dev)
- rcu_assign_pointer(ip6n->tnls_wc[0], NULL);
+ RCU_INIT_POINTER(ip6n->tnls_wc[0], NULL);
else
ip6_tnl_unlink(ip6n, t);
ip6_tnl_dst_reset(t);
@@ -1440,7 +1440,7 @@
t->parms.proto = IPPROTO_IPV6;
dev_hold(dev);
- rcu_assign_pointer(ip6n->tnls_wc[0], t);
+ RCU_INIT_POINTER(ip6n->tnls_wc[0], t);
return 0;
}