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kernel/linux-rt-4.4.41/include/linux/sched/deadline.h 514 Bytes
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  #ifndef _SCHED_DEADLINE_H
  #define _SCHED_DEADLINE_H
  
  /*
   * SCHED_DEADLINE tasks has negative priorities, reflecting
   * the fact that any of them has higher prio than RT and
   * NORMAL/BATCH tasks.
   */
  
  #define MAX_DL_PRIO		0
  
  static inline int dl_prio(int prio)
  {
  	if (unlikely(prio < MAX_DL_PRIO))
  		return 1;
  	return 0;
  }
  
  static inline int dl_task(struct task_struct *p)
  {
  	return dl_prio(p->prio);
  }
  
  static inline bool dl_time_before(u64 a, u64 b)
  {
  	return (s64)(a - b) < 0;
  }
  
  #endif /* _SCHED_DEADLINE_H */