diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index ba370dc8685bf8f9bf31e9100f78c4e800ea755e..b3078f4ce25b537f49bbfbc3ac876ee78f17bc0a 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -139,27 +139,23 @@ static int __cpuinit mwait_usable(const struct cpuinfo_x86 *c)
 
 void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
 {
-	static int selected;
-
-	if (selected)
-		return;
 #ifdef CONFIG_X86_SMP
 	if (pm_idle == poll_idle && smp_num_siblings > 1) {
 		printk(KERN_WARNING "WARNING: polling idle and HT enabled,"
 			" performance may degrade.\n");
 	}
 #endif
+	if (pm_idle)
+		return;
+
 	if (cpu_has(c, X86_FEATURE_MWAIT) && mwait_usable(c)) {
 		/*
-		 * Skip, if setup has overridden idle.
 		 * One CPU supports mwait => All CPUs supports mwait
 		 */
-		if (!pm_idle) {
-			printk(KERN_INFO "using mwait in idle threads.\n");
-			pm_idle = mwait_idle;
-		}
-	}
-	selected = 1;
+		printk(KERN_INFO "using mwait in idle threads.\n");
+		pm_idle = mwait_idle;
+	} else
+		pm_idle = default_idle;
 }
 
 static int __init idle_setup(char *str)
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index f8476dfbb60d9818f5da08d3a5b95a223930964f..ee4ab461c50d4522184a0e9b21ab20ce794db270 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -168,24 +168,19 @@ void cpu_idle(void)
 	while (1) {
 		tick_nohz_stop_sched_tick();
 		while (!need_resched()) {
-			void (*idle)(void);
 
 			check_pgt_cache();
 			rmb();
-			idle = pm_idle;
 
 			if (rcu_pending(cpu))
 				rcu_check_callbacks(cpu, 0);
 
-			if (!idle)
-				idle = default_idle;
-
 			if (cpu_is_offline(cpu))
 				play_dead();
 
 			local_irq_disable();
 			__get_cpu_var(irq_stat).idle_timestamp = jiffies;
-			idle();
+			pm_idle();
 		}
 		tick_nohz_restart_sched_tick();
 		preempt_enable_no_resched();
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index e2319f39988b042f364a73174a0d2ac254a5b60d..db3d89a04399e91096f675ebe633bf6e1e47fac7 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -150,12 +150,9 @@ void cpu_idle(void)
 	while (1) {
 		tick_nohz_stop_sched_tick();
 		while (!need_resched()) {
-			void (*idle)(void);
 
 			rmb();
-			idle = pm_idle;
-			if (!idle)
-				idle = default_idle;
+
 			if (cpu_is_offline(smp_processor_id()))
 				play_dead();
 			/*
@@ -165,7 +162,7 @@ void cpu_idle(void)
 			 */
 			local_irq_disable();
 			enter_idle();
-			idle();
+			pm_idle();
 			/* In many cases the interrupt that ended idle
 			   has already called exit_idle. But some idle
 			   loops can be woken up without interrupt. */