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>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 0ba0866230c9..a225d5ee3c2f 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -429,7 +429,7 @@ static struct inet6_dev * ipv6_add_dev(struct net_device *dev)
         ndev->tstamp = jiffies;
         addrconf_sysctl_register(ndev);
         /* protected by rtnl_lock */
-        RCU_INIT_POINTER(dev->ip6_ptr, ndev);
+        rcu_assign_pointer(dev->ip6_ptr, ndev);
 
         /* Join all-node multicast group */
         ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);