--- linux-2.6.35.noarch/kernel/rcutree.c~	2011-08-22 10:46:35.518079924 -0400

+++ linux-2.6.35.noarch/kernel/rcutree.c	2011-08-22 10:46:47.151040660 -0400

@@ -1376,9 +1376,6 @@ static void rcu_process_callbacks(struct

 	 * grace-period manipulations above.

 	 */

 	smp_mb(); /* See above block comment. */

-

-	/* If we are last CPU on way to dyntick-idle mode, accelerate it. */

-	rcu_needs_cpu_flush();

 }

 static void

--- linux-2.6.35.noarch/kernel/rcutree.h~	2011-08-22 10:48:36.063675727 -0400

+++ linux-2.6.35.noarch/kernel/rcutree.h	2011-08-22 10:48:43.639650514 -0400

@@ -384,6 +384,5 @@ static int rcu_preempt_needs_cpu(int cpu

 static void __cpuinit rcu_preempt_init_percpu_data(int cpu);

 static void rcu_preempt_send_cbs_to_orphanage(void);

 static void __init __rcu_init_preempt(void);

-static void rcu_needs_cpu_flush(void);

 #endif /* #ifndef RCU_TREE_NONCORE */

--- a/kernel/rcutree_plugin.h	

+++ a/kernel/rcutree_plugin.h	

@@ -1954,15 +1954,6 @@ int rcu_needs_cpu(int cpu)

 	return rcu_needs_cpu_quick_check(cpu);

 }

-/*

- * Check to see if we need to continue a callback-flush operations to

- * allow the last CPU to enter dyntick-idle mode.  But fast dyntick-idle

- * entry is not configured, so we never do need to.

- */

-static void rcu_needs_cpu_flush(void)

-{

-}

-

 #else /* #if !defined(CONFIG_RCU_FAST_NO_HZ) */

 #define RCU_NEEDS_CPU_FLUSHES 5

@@ -2039,20 +2030,4 @@ int rcu_needs_cpu(int cpu)

 	return c;

 }

-/*

- * Check to see if we need to continue a callback-flush operations to

- * allow the last CPU to enter dyntick-idle mode.

- */

-static void rcu_needs_cpu_flush(void)

-{

-	int cpu = smp_processor_id();

-	unsigned long flags;

-

-	if (per_cpu(rcu_dyntick_drain, cpu) <= 0)

-		return;

-	local_irq_save(flags);

-	(void)rcu_needs_cpu(cpu);

-	local_irq_restore(flags);

-}

-

 #endif /* #else #if !defined(CONFIG_RCU_FAST_NO_HZ) */