1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _LINUX_SCHED_RT_H 3#define _LINUX_SCHED_RT_H 4 5#include <linux/sched.h> 6 7struct task_struct; 8 9static inline int rt_prio(int prio) 10{ 11 if (unlikely(prio < MAX_RT_PRIO)) 12 return 1; 13 return 0; 14} 15 16static inline int rt_task(struct task_struct *p) 17{ 18 return rt_prio(p->prio); 19} 20 21static inline bool task_is_realtime(struct task_struct *tsk) 22{ 23 int policy = tsk->policy; 24 25 if (policy == SCHED_FIFO || policy == SCHED_RR) 26 return true; 27 if (policy == SCHED_DEADLINE) 28 return true; 29 return false; 30} 31 32#ifdef CONFIG_RT_MUTEXES 33extern void rt_mutex_pre_schedule(void); 34extern void rt_mutex_schedule(void); 35extern void rt_mutex_post_schedule(void); 36 37/* 38 * Must hold either p->pi_lock or task_rq(p)->lock. 39 */ 40static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *p) 41{ 42 return p->pi_top_task; 43} 44extern void rt_mutex_setprio(struct task_struct *p, struct task_struct *pi_task); 45extern void rt_mutex_adjust_pi(struct task_struct *p); 46#else 47static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *task) 48{ 49 return NULL; 50} 51# define rt_mutex_adjust_pi(p) do { } while (0) 52#endif 53 54extern void normalize_rt_tasks(void); 55 56 57/* 58 * default timeslice is 100 msecs (used only for SCHED_RR tasks). 59 * Timeslices get refilled after they expire. 60 */ 61#define RR_TIMESLICE (100 * HZ / 1000) 62 63#endif /* _LINUX_SCHED_RT_H */ 64