net/decnet: Replace rcu_barrier_bh() with rcu_barrier()

Now that all RCU flavors have been consolidated, rcu_barrier_bh()
is but a synonym for rcu_barrier().  This commit therefore replaces
the former with the latter.

Signed-off-by: Paul E. McKenney <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: <[email protected]>
Cc: <[email protected]>

net/decnet/af_decnet.c

@@ -2405,7 +2405,7 @@ static void __exit decnet_exit(void)
 
 	proto_unregister(&dn_proto);
 
-	rcu_barrier_bh(); /* Wait for completion of call_rcu_bh()'s */
+	rcu_barrier(); /* Wait for completion of call_rcu()'s */
 }
 module_exit(decnet_exit);
 #endif