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 7 struct task_struct; 8 rt_prio(int prio)9static inline int rt_prio(int prio) 10 { 11 if (unlikely(prio < MAX_RT_PRIO)) 12 return 1; 13 return 0; 14 } 15 rt_task(struct task_struct * p)16static inline int rt_task(struct task_struct *p) 17 { 18 return rt_prio(p->prio); 19 } 20 task_is_realtime(struct task_struct * tsk)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 33 extern void rt_mutex_pre_schedule(void); 34 extern void rt_mutex_schedule(void); 35 extern void rt_mutex_post_schedule(void); 36 37 /* 38 * Must hold either p->pi_lock or task_rq(p)->lock. 39 */ rt_mutex_get_top_task(struct task_struct * p)40static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *p) 41 { 42 return p->pi_top_task; 43 } 44 extern void rt_mutex_setprio(struct task_struct *p, struct task_struct *pi_task); 45 extern void rt_mutex_adjust_pi(struct task_struct *p); 46 #else rt_mutex_get_top_task(struct task_struct * task)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 54 extern 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