bfin: Use generic idle loop

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Mike Frysinger <vapier@gentoo.org>
Link: http://lkml.kernel.org/r/20130321215234.014923303@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/blackfin/Kconfig

@@ -41,6 +41,7 @@ config BLACKFIN
 	select USE_GENERIC_SMP_HELPERS if SMP
 	select HAVE_NMI_WATCHDOG if NMI_WATCHDOG
 	select GENERIC_SMP_IDLE_THREAD
+	select GENERIC_IDLE_LOOP
 	select ARCH_USES_GETTIMEOFFSET if !GENERIC_CLOCKEVENTS
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_RELA

arch/blackfin/kernel/process.c

@@ -46,15 +46,14 @@ EXPORT_SYMBOL(pm_power_off);
  * The idle loop on BFIN
  */
 #ifdef CONFIG_IDLE_L1
-static void default_idle(void)__attribute__((l1_text));
-void cpu_idle(void)__attribute__((l1_text));
+void arch_cpu_idle(void)__attribute__((l1_text));
 #endif
 
 /*
  * This is our default idle handler.  We need to disable
  * interrupts here to ensure we don't miss a wakeup call.
  */
-static void default_idle(void)
+void arch_cpu_idle(void)
 {
 #ifdef CONFIG_IPIPE
 	ipipe_suspend_domain();
@@ -66,31 +65,12 @@ static void default_idle(void)
 	hard_local_irq_enable();
 }
 
-/*
- * The idle thread.  We try to conserve power, while trying to keep
- * overall latency low.  The architecture specific idle is passed
- * a value to indicate the level of "idleness" of the system.
- */
-void cpu_idle(void)
+#ufdef CONFIG_HOTPLUG_CPU
+void arch_cpu_idle_dead(void)
 {
-	/* endless idle loop with no priority at all */
-	while (1) {
-
-#ifdef CONFIG_HOTPLUG_CPU
-		if (cpu_is_offline(smp_processor_id()))
-			cpu_die();
-#endif
-		tick_nohz_idle_enter();
-		rcu_idle_enter();
-		while (!need_resched())
-			default_idle();
-		rcu_idle_exit();
-		tick_nohz_idle_exit();
-		preempt_enable_no_resched();
-		schedule();
-		preempt_disable();
-	}
+	cpu_die();
 }
+#endif
 
 /*
  * Do necessary setup to start up a newly executed thread.

arch/blackfin/mach-common/smp.c

@@ -335,7 +335,7 @@ void __cpuinit secondary_start_kernel(void)
 	 */
 	calibrate_delay();
 
-	cpu_idle();
+	cpu_startup_entry(CPUHP_ONLINE);
 }
 
 void __init smp_prepare_boot_cpu(void)