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Edit File: rt.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_SCHED_RT_H
#define _LINUX_SCHED_RT_H

#include <linux/sched.h>

struct task_struct;

static inline int rt_prio(int prio)
{
	if (unlikely(prio < MAX_RT_PRIO))
		return 1;
	return 0;
}

static inline int rt_task(struct task_struct *p)
{
	return rt_prio(p->prio);
}

static inline bool task_is_realtime(struct task_struct *tsk)
{
	int policy = tsk->policy;

if (policy == SCHED_FIFO || policy == SCHED_RR)
		return true;
	if (policy == SCHED_DEADLINE)
		return true;
	return false;
}

#ifdef CONFIG_RT_MUTEXES
/*
 * Must hold either p->pi_lock or task_rq(p)->lock.
 */
static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *p)
{
	return p->pi_top_task;
}
extern void rt_mutex_setprio(struct task_struct *p, struct task_struct *pi_task);
extern void rt_mutex_adjust_pi(struct task_struct *p);
#else
static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *task)
{
	return NULL;
}
# define rt_mutex_adjust_pi(p)		do { } while (0)
#endif

extern void normalize_rt_tasks(void);

/*
 * default timeslice is 100 msecs (used only for SCHED_RR tasks).
 * Timeslices get refilled after they expire.
 */
#define RR_TIMESLICE		(100 * HZ / 1000)

#endif /* _LINUX_SCHED_RT_H */