projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| ff0d4a9d SAS |
21 | static 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 | ||
| 8bd75c77 | 32 | #ifdef CONFIG_RT_MUTEXES |
| acd58620 PZ |
33 | /* |
| 34 | * Must hold either p->pi_lock or task_rq(p)->lock. | |
| 35 | */ | |
| 36 | static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *p) | |
| 37 | { | |
| 38 | return p->pi_top_task; | |
| 39 | } | |
| 40 | extern void rt_mutex_setprio(struct task_struct *p, struct task_struct *pi_task); | |
| 8bd75c77 CW |
41 | extern void rt_mutex_adjust_pi(struct task_struct *p); |
| 42 | static inline bool tsk_is_pi_blocked(struct task_struct *tsk) | |
| 43 | { | |
| 44 | return tsk->pi_blocked_on != NULL; | |
| 45 | } | |
| 46 | #else | |
| 2d3d891d DF |
47 | static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *task) |
| 48 | { | |
| 49 | return NULL; | |
| 50 | } | |
| 8bd75c77 CW |
51 | # define rt_mutex_adjust_pi(p) do { } while (0) |
| 52 | static inline bool tsk_is_pi_blocked(struct task_struct *tsk) | |
| 53 | { | |
| 54 | return false; | |
| 55 | } | |
| 56 | #endif | |
| 57 | ||
| 58 | extern void normalize_rt_tasks(void); | |
| 59 | ||
| 60 | ||
| bc681593 CW |
61 | /* |
| 62 | * default timeslice is 100 msecs (used only for SCHED_RR tasks). | |
| 63 | * Timeslices get refilled after they expire. | |
| 64 | */ | |
| 65 | #define RR_TIMESLICE (100 * HZ / 1000) | |
| 66 | ||
| 9ccd27cc | 67 | #endif /* _LINUX_SCHED_RT_H */ |