--- 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) */