3  * Generic entry points for the idle threads and
4  * implementation of the idle task scheduling class.
14  * sched_idle_set_state - Record idle state for the current CPU.
104  * default_idle_call - Default CPU idle routine.
141 	 * The idle task must be scheduled, it is pointless to go to idle, just  in call_cpuidle()
142 	 * update no idle residency and return.  in call_cpuidle()
151 	 * Enter the idle state previously returned by the governor decision.  in call_cpuidle()
159  * cpuidle_idle_call - the main idle function
174 	 * Check if the idle task must be rescheduled. If it is the  in cpuidle_idle_call()
190 	 * Suspend-to-idle ("s2idle") is a system state in which all user space  in cpuidle_idle_call()
193 	 * the cpuidle governor and go straight for the deepest idle state  in cpuidle_idle_call()
195 	 * timekeeping to prevent timer interrupts from kicking us out of idle  in cpuidle_idle_call()
221 		 * Ask the cpuidle framework to choose a convenient idle state.  in cpuidle_idle_call()
241 	 * It is up to the idle functions to re-enable local interrupts  in cpuidle_idle_call()
248  * Generic idle loop implementation
265 	 * rq->idle). This means that, if rq->idle has the polling bit set,  in do_idle()
293 		 * - ROLLBACK based idle handlers with the sleeping instruction  in do_idle()
295 		 *   when the interrupt detects it has interrupted an idle handler,  in do_idle()
302 		 *   interrupted an idle handler, it must resume to the end of  in do_idle()
303 		 *   this idle handler so that the generic idle loop is iterated  in do_idle()
318 		 * detected in the wakeup from idle path that the tick  in do_idle()
320 		 * idle as we know that the IPI is going to arrive right away.  in do_idle()
335 	 * This is required because for polling idle loops we will not have had  in do_idle()
428  * idle-task scheduling class.
435 	return task_cpu(p); /* IDLE tasks as never migrated */  in select_task_rq_idle()
446  * Idle tasks are unconditionally rescheduled:
469 	return rq->idle;  in pick_task_idle()
473  * It is not legal to sleep in the idle task - print a warning
480 	printk(KERN_ERR "bad: scheduling from the idle thread!\n");  in dequeue_task_idle()
514  * Simple, special scheduling class for the per-CPU idle tasks:
516 DEFINE_SCHED_CLASS(idle) = {
518 	/* no enqueue/yield_task for idle tasks */