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
13 #define MAX_DL_PRIO 0
14
15 static inline int dl_prio(int prio)
16 {
17 if (unlikely(prio < MAX_DL_PRIO))
18 return 1;
19 return 0;
20 }
21
22 static inline int dl_task(struct task_struct *p)
23 {
24 return dl_prio(p->prio);
25 }
26
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
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