diff -ur linux-2.6.11/kernel/rcupdate.c linux-2.6.11-rcu/kernel/rcupdate.c
--- linux-2.6.11/kernel/rcupdate.c	2005-05-30 10:51:41 +01:00
+++ linux-2.6.11-rcu/kernel/rcupdate.c	2005-05-30 10:53:53 +01:00
@@ -202,8 +202,11 @@
  */
 static void cpu_quiet(int cpu, struct rcu_ctrlblk *rcp, struct rcu_state *rsp)
 {
+	cpumask_t mask;
+
 	cpu_clear(cpu, rsp->cpumask);
-	if (cpus_empty(rsp->cpumask)) {
+	cpus_andnot(mask, rsp->cpumask, nohz_cpu_mask);
+	if (cpus_empty(mask)) {
 		/* batch completed ! */
 		rcp->completed = rcp->cur;
 		rcu_start_batch(rcp, rsp, 0);