[NETFILTER]: nf_conntrack: use RCU for conntrack hash

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/xt_connlimit.c b/net/netfilter/xt_connlimit.c
index e00ecd9..f9b59a6 100644
--- a/net/netfilter/xt_connlimit.c
+++ b/net/netfilter/xt_connlimit.c
@@ -120,7 +120,7 @@
 	else
 		hash = &data->iphash[connlimit_iphash(addr->ip & mask->ip)];
 
-	read_lock_bh(&nf_conntrack_lock);
+	rcu_read_lock();
 
 	/* check the saved connections */
 	list_for_each_entry_safe(conn, tmp, hash, list) {
@@ -163,7 +163,7 @@
 			++matches;
 	}
 
-	read_unlock_bh(&nf_conntrack_lock);
+	rcu_read_unlock();
 
 	if (addit) {
 		/* save the new connection in our list */