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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
9ccd27cc IM |
2 | #ifndef _LINUX_SCHED_RT_H |
3 | #define _LINUX_SCHED_RT_H | |
8bd75c77 | 4 | |
9ccd27cc IM |
5 | #include <linux/sched.h> |
6 | ||
7 | struct task_struct; | |
8bd75c77 CW |
8 | |
9 | static inline int rt_prio(int prio) | |
10 | { | |
11 | if (unlikely(prio < MAX_RT_PRIO)) | |
12 | return 1; | |
13 | return 0; | |
14 | } | |
15 | ||
16 | static inline int rt_task(struct task_struct *p) | |
17 | { | |
18 | return rt_prio(p->prio); | |
19 | } | |
20 | ||
21 | #ifdef CONFIG_RT_MUTEXES | |
acd58620 PZ |
22 | /* |
23 | * Must hold either p->pi_lock or task_rq(p)->lock. | |
24 | */ | |
25 | static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *p) | |
26 | { | |
27 | return p->pi_top_task; | |
28 | } | |
29 | extern void rt_mutex_setprio(struct task_struct *p, struct task_struct *pi_task); | |
8bd75c77 CW |
30 | extern void rt_mutex_adjust_pi(struct task_struct *p); |
31 | static inline bool tsk_is_pi_blocked(struct task_struct *tsk) | |
32 | { | |
33 | return tsk->pi_blocked_on != NULL; | |
34 | } | |
35 | #else | |
2d3d891d DF |
36 | static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *task) |
37 | { | |
38 | return NULL; | |
39 | } | |
8bd75c77 CW |
40 | # define rt_mutex_adjust_pi(p) do { } while (0) |
41 | static inline bool tsk_is_pi_blocked(struct task_struct *tsk) | |
42 | { | |
43 | return false; | |
44 | } | |
45 | #endif | |
46 | ||
47 | extern void normalize_rt_tasks(void); | |
48 | ||
49 | ||
bc681593 CW |
50 | /* |
51 | * default timeslice is 100 msecs (used only for SCHED_RR tasks). | |
52 | * Timeslices get refilled after they expire. | |
53 | */ | |
54 | #define RR_TIMESLICE (100 * HZ / 1000) | |
55 | ||
9ccd27cc | 56 | #endif /* _LINUX_SCHED_RT_H */ |