forked from Qortal/Brooklyn
2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
110 lines
2.3 KiB
C
110 lines
2.3 KiB
C
#include "sched.h"
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/*
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* idle-task scheduling class.
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*
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* (NOTE: these are not related to SCHED_IDLE tasks which are
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* handled in sched/fair.c)
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*/
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#ifdef CONFIG_SMP
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static int
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select_task_rq_idle(struct task_struct *p, int cpu, int sd_flag, int flags)
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{
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return task_cpu(p); /* IDLE tasks as never migrated */
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}
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#endif /* CONFIG_SMP */
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/*
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* Idle tasks are unconditionally rescheduled:
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*/
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static void check_preempt_curr_idle(struct rq *rq, struct task_struct *p, int flags)
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{
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resched_curr(rq);
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}
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static struct task_struct *
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pick_next_task_idle(struct rq *rq, struct task_struct *prev, struct pin_cookie cookie)
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{
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put_prev_task(rq, prev);
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update_idle_core(rq);
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schedstat_inc(rq->sched_goidle);
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return rq->idle;
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}
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/*
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* It is not legal to sleep in the idle task - print a warning
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* message if some code attempts to do it:
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*/
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static void
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dequeue_task_idle(struct rq *rq, struct task_struct *p, int flags)
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{
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raw_spin_unlock_irq(&rq->lock);
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printk(KERN_ERR "bad: scheduling from the idle thread!\n");
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dump_stack();
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raw_spin_lock_irq(&rq->lock);
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}
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static void put_prev_task_idle(struct rq *rq, struct task_struct *prev)
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{
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rq_last_tick_reset(rq);
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}
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static void task_tick_idle(struct rq *rq, struct task_struct *curr, int queued)
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{
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}
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static void set_curr_task_idle(struct rq *rq)
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{
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}
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static void switched_to_idle(struct rq *rq, struct task_struct *p)
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{
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BUG();
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}
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static void
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prio_changed_idle(struct rq *rq, struct task_struct *p, int oldprio)
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{
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BUG();
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}
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static unsigned int get_rr_interval_idle(struct rq *rq, struct task_struct *task)
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{
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return 0;
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}
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static void update_curr_idle(struct rq *rq)
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{
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}
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/*
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* Simple, special scheduling class for the per-CPU idle tasks:
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*/
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const struct sched_class idle_sched_class = {
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/* .next is NULL */
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/* no enqueue/yield_task for idle tasks */
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/* dequeue is not valid, we print a debug message there: */
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.dequeue_task = dequeue_task_idle,
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.check_preempt_curr = check_preempt_curr_idle,
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.pick_next_task = pick_next_task_idle,
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.put_prev_task = put_prev_task_idle,
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#ifdef CONFIG_SMP
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.select_task_rq = select_task_rq_idle,
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.set_cpus_allowed = set_cpus_allowed_common,
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#endif
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.set_curr_task = set_curr_task_idle,
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.task_tick = task_tick_idle,
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.get_rr_interval = get_rr_interval_idle,
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.prio_changed = prio_changed_idle,
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.switched_to = switched_to_idle,
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.update_curr = update_curr_idle,
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};
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