#include "sched.h" /* * idle-task scheduling class. * * (NOTE: these are not related to SCHED_IDLE tasks which are * handled in sched/fair.c) */ #ifdef CONFIG_SMP static int select_task_rq_idle(struct task_struct *p, int cpu, int sd_flag, int flags) { return task_cpu(p); /* IDLE tasks as never migrated */ } #endif /* CONFIG_SMP */ /* * Idle tasks are unconditionally rescheduled: */ static void check_preempt_curr_idle(struct rq *rq, struct task_struct *p, int flags) { resched_curr(rq); } static struct task_struct * pick_next_task_idle(struct rq *rq, struct task_struct *prev, struct pin_cookie cookie) { put_prev_task(rq, prev); update_idle_core(rq); schedstat_inc(rq->sched_goidle); return rq->idle; } /* * It is not legal to sleep in the idle task - print a warning * message if some code attempts to do it: */ static void dequeue_task_idle(struct rq *rq, struct task_struct *p, int flags) { raw_spin_unlock_irq(&rq->lock); printk(KERN_ERR "bad: scheduling from the idle thread!\n"); dump_stack(); raw_spin_lock_irq(&rq->lock); } static void put_prev_task_idle(struct rq *rq, struct task_struct *prev) { rq_last_tick_reset(rq); } static void task_tick_idle(struct rq *rq, struct task_struct *curr, int queued) { } static void set_curr_task_idle(struct rq *rq) { } static void switched_to_idle(struct rq *rq, struct task_struct *p) { BUG(); } static void prio_changed_idle(struct rq *rq, struct task_struct *p, int oldprio) { BUG(); } static unsigned int get_rr_interval_idle(struct rq *rq, struct task_struct *task) { return 0; } static void update_curr_idle(struct rq *rq) { } /* * Simple, special scheduling class for the per-CPU idle tasks: */ const struct sched_class idle_sched_class = { /* .next is NULL */ /* no enqueue/yield_task for idle tasks */ /* dequeue is not valid, we print a debug message there: */ .dequeue_task = dequeue_task_idle, .check_preempt_curr = check_preempt_curr_idle, .pick_next_task = pick_next_task_idle, .put_prev_task = put_prev_task_idle, #ifdef CONFIG_SMP .select_task_rq = select_task_rq_idle, .set_cpus_allowed = set_cpus_allowed_common, #endif .set_curr_task = set_curr_task_idle, .task_tick = task_tick_idle, .get_rr_interval = get_rr_interval_idle, .prio_changed = prio_changed_idle, .switched_to = switched_to_idle, .update_curr = update_curr_idle, }; option>
path: root/net/irda/ircomm/Kconfig
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