x86: simplify idle selection

default_idle is selected in cpu_idle(), when no other idle routine is
selected. Select it in select_idle_routine() when mwait is not
selected.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 5 deletions

diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index e2319f39988b..db3d89a04399 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. */