xref: /openbmc/linux/include/linux/sched/rt.h (revision f7c35abe)
1 #ifndef _LINUX_SCHED_RT_H
2 #define _LINUX_SCHED_RT_H
3 
4 #include <linux/sched.h>
5 
6 struct task_struct;
7 
8 static inline int rt_prio(int prio)
9 {
10 	if (unlikely(prio < MAX_RT_PRIO))
11 		return 1;
12 	return 0;
13 }
14 
15 static inline int rt_task(struct task_struct *p)
16 {
17 	return rt_prio(p->prio);
18 }
19 
20 #ifdef CONFIG_RT_MUTEXES
21 extern int rt_mutex_getprio(struct task_struct *p);
22 extern void rt_mutex_setprio(struct task_struct *p, int prio);
23 extern int rt_mutex_get_effective_prio(struct task_struct *task, int newprio);
24 extern struct task_struct *rt_mutex_get_top_task(struct task_struct *task);
25 extern void rt_mutex_adjust_pi(struct task_struct *p);
26 static inline bool tsk_is_pi_blocked(struct task_struct *tsk)
27 {
28 	return tsk->pi_blocked_on != NULL;
29 }
30 #else
31 static inline int rt_mutex_getprio(struct task_struct *p)
32 {
33 	return p->normal_prio;
34 }
35 
36 static inline int rt_mutex_get_effective_prio(struct task_struct *task,
37 					      int newprio)
38 {
39 	return newprio;
40 }
41 
42 static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *task)
43 {
44 	return NULL;
45 }
46 # define rt_mutex_adjust_pi(p)		do { } while (0)
47 static inline bool tsk_is_pi_blocked(struct task_struct *tsk)
48 {
49 	return false;
50 }
51 #endif
52 
53 extern void normalize_rt_tasks(void);
54 
55 
56 /*
57  * default timeslice is 100 msecs (used only for SCHED_RR tasks).
58  * Timeslices get refilled after they expire.
59  */
60 #define RR_TIMESLICE		(100 * HZ / 1000)
61 
62 #endif /* _LINUX_SCHED_RT_H */
63