cris: 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>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Link: http://lkml.kernel.org/r/20130321215234.148829489@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

5 files changed, 9 insertions, 33 deletions

diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index 06dd026533e3..1dd36355a3cd 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig
@@ -48,6 +48,7 @@ config CRIS
         select GENERIC_IRQ_SHOW
         select GENERIC_IOMAP
         select GENERIC_SMP_IDLE_THREAD if ETRAX_ARCH_V32
+        select GENERIC_IDLE_LOOP
         select GENERIC_CMOS_UPDATE
         select MODULES_USE_ELF_RELA
         select CLONE_BACKWARDS2
diff --git a/arch/cris/arch-v10/kernel/process.c b/arch/cris/arch-v10/kernel/process.c
index b1018750cffb..2ba23c13df68 100644
--- a/arch/cris/arch-v10/kernel/process.c
+++ b/arch/cris/arch-v10/kernel/process.c
@@ -30,8 +30,9 @@ void etrax_gpio_wake_up_check(void); /* drivers/gpio.c */
 void default_idle(void)
 {
 #ifdef CONFIG_ETRAX_GPIO
-  etrax_gpio_wake_up_check();
+        etrax_gpio_wake_up_check();
 #endif
+        local_irq_enable();
 }
 
 /*
diff --git a/arch/cris/arch-v32/kernel/process.c b/arch/cris/arch-v32/kernel/process.c
index 4857933d59f4..57451faa9b20 100644
--- a/arch/cris/arch-v32/kernel/process.c
+++ b/arch/cris/arch-v32/kernel/process.c
@@ -23,13 +23,9 @@ extern void stop_watchdog(void);
 /* We use this if we don't have any better idle routine. */
 void default_idle(void)
 {
-        local_irq_disable();
-        if (!need_resched()) {
-                /* Halt until exception. */
-                __asm__ volatile("ei    \n\t"
-                                 "halt      ");
-        }
-        local_irq_enable();
+        /* Halt until exception. */
+        __asm__ volatile("ei    \n\t"
+                         "halt      ");
 }
 
 /*
diff --git a/arch/cris/arch-v32/kernel/smp.c b/arch/cris/arch-v32/kernel/smp.c
index 04a16edd5401..cdd12028de0c 100644
--- a/arch/cris/arch-v32/kernel/smp.c
+++ b/arch/cris/arch-v32/kernel/smp.c
@@ -145,8 +145,6 @@ smp_boot_one_cpu(int cpuid, struct task_struct idle)
  * specific stuff such as the local timer and the MMU. */
 void __init smp_callin(void)
 {
-        extern void cpu_idle(void);
-
         int cpu = cpu_now_booting;
         reg_intr_vect_rw_mask vect_mask = {0};
 
@@ -170,7 +168,7 @@ void __init smp_callin(void)
         local_irq_enable();
 
         set_cpu_online(cpu, true);
-        cpu_idle();
+        cpu_startup_entry(CPUHP_ONLINE);
 }
 
 /* Stop execution on this CPU.*/
diff --git a/arch/cris/kernel/process.c b/arch/cris/kernel/process.c
index 508c9cdacc7b..b78498eb079b 100644
--- a/arch/cris/kernel/process.c
+++ b/arch/cris/kernel/process.c
@@ -34,29 +34,9 @@ extern void default_idle(void);
 void (*pm_power_off)(void);
 EXPORT_SYMBOL(pm_power_off);
 
-/*
- * The idle thread. There's no useful work to be
- * done, so just try to conserve power and have a
- * low exit latency (ie sit in a loop waiting for
- * somebody to say that they'd like to reschedule)
- */
-
-void cpu_idle (void)
+void arch_cpu_idle(void)
 {
-        /* endless idle loop with no priority at all */
-        while (1) {
-                rcu_idle_enter();
-                while (!need_resched()) {
-                        /*
-                         * Mark this as an RCU critical section so that
-                         * synchronize_kernel() in the unload path waits
-                         * for our completion.
-                         */
-                        default_idle();
-                }
-                rcu_idle_exit();
-                schedule_preempt_disabled();
-        }
+        default_idle();
 }
 
 void hard_reset_now (void);