include/linux/sched/deadline.h

   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 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  */
  22 static inline bool 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 */