1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_SCHED_DEADLINE_H
3 #define _LINUX_SCHED_DEADLINE_H
4 
5 /*
6  * SCHED_DEADLINE tasks has negative priorities, reflecting
7  * the fact that any of them has higher prio than RT and
8  * NORMAL/BATCH tasks.
9  */
10 
11 #include <linux/sched.h>
12 
dl_prio(int prio)13 static inline bool dl_prio(int prio)
14 {
15 	return unlikely(prio < MAX_DL_PRIO);
16 }
17 
18 /*
19  * Returns true if a task has a priority that belongs to DL class. PI-boosted
20  * tasks will return true. Use dl_policy() to ignore PI-boosted tasks.
21  */
dl_task(struct task_struct * p)22 static inline bool dl_task(struct task_struct *p)
23 {
24 	return dl_prio(p->prio);
25 }
26 
dl_time_before(u64 a,u64 b)27 static inline bool dl_time_before(u64 a, u64 b)
28 {
29 	return (s64)(a - b) < 0;
30 }
31 
32 #ifdef CONFIG_SMP
33 
34 struct root_domain;
35 extern void dl_add_task_root_domain(struct task_struct *p);
36 extern void dl_clear_root_domain(struct root_domain *rd);
37 
38 #endif /* CONFIG_SMP */
39 
40 #endif /* _LINUX_SCHED_DEADLINE_H */
41