rcu: Remove rsp parameter from no-CBs CPU functions

There now is only one rcu_state structure in a given build of the
Linux kernel, so there is no need to pass it as a parameter to
RCU's functions.  This commit therefore removes the rsp parameter
from rcu_nocb_cpu_needs_barrier(), rcu_spawn_one_nocb_kthread(),
rcu_organize_nocb_kthreads(), rcu_nocb_cpu_needs_barrier(), and
rcu_nohz_full_cpu().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

kernel/rcu/tree.c

@@ -3095,7 +3095,7 @@ static int rcu_pending(void)
 	check_cpu_stall(rdp);
 
 	/* Is this CPU a NO_HZ_FULL CPU that should ignore RCU? */
-	if (rcu_nohz_full_cpu(&rcu_state))
+	if (rcu_nohz_full_cpu())
 		return 0;
 
 	/* Is the RCU core waiting for a quiescent state from this CPU? */
@@ -3246,7 +3246,7 @@ static void _rcu_barrier(void)
 			continue;
 		rdp = per_cpu_ptr(&rcu_data, cpu);
 		if (rcu_is_nocb_cpu(cpu)) {
-			if (!rcu_nocb_cpu_needs_barrier(rsp, cpu)) {
+			if (!rcu_nocb_cpu_needs_barrier(cpu)) {
 				_rcu_barrier_trace(TPS("OfflineNoCB"), cpu,
 						   rsp->barrier_sequence);
 			} else {