net: reintroduce missing rcu_assign_pointer() calls
commit a9b3cd7f32 (rcu: convert uses of rcu_assign_pointer(x, NULL) to
RCU_INIT_POINTER) did a lot of incorrect changes, since it did a
complete conversion of rcu_assign_pointer(x, y) to RCU_INIT_POINTER(x,
y).
We miss needed barriers, even on x86, when y is not NULL.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Stephen Hemminger <shemminger@vyatta.com>
CC: 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 e1f7761..aa21da6 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_INIT_POINTER(t->next , rtnl_dereference(*tp));
- RCU_INIT_POINTER(*tp, t);
+ rcu_assign_pointer(t->next , rtnl_dereference(*tp));
+ rcu_assign_pointer(*tp, t);
}
/**
@@ -237,7 +237,7 @@
(iter = rtnl_dereference(*tp)) != NULL;
tp = &iter->next) {
if (t == iter) {
- RCU_INIT_POINTER(*tp, t->next);
+ rcu_assign_pointer(*tp, t->next);
break;
}
}
@@ -1450,7 +1450,7 @@
t->parms.proto = IPPROTO_IPV6;
dev_hold(dev);
- RCU_INIT_POINTER(ip6n->tnls_wc[0], t);
+ rcu_assign_pointer(ip6n->tnls_wc[0], t);
return 0;
}