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Linux/include/linux/sched/deadline.h

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  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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