Line data    Source code

       1             : /* SPDX-License-Identifier: GPL-2.0 */
       2             : #ifndef _LINUX_SCHED_RT_H
       3             : #define _LINUX_SCHED_RT_H
       4             : 
       5             : #include <linux/sched.h>
       6             : 
       7             : struct task_struct;
       8             : 
       9             : static inline int rt_prio(int prio)
      10             : {
      11         181 :         if (unlikely(prio < MAX_RT_PRIO))
      12             :                 return 1;
      13             :         return 0;
      14             : }
      15             : 
      16             : static inline int rt_task(struct task_struct *p)
      17             : {
      18           2 :         return rt_prio(p->prio);
      19             : }
      20             : 
      21             : static inline bool task_is_realtime(struct task_struct *tsk)
      22             : {
      23           0 :         int policy = tsk->policy;
      24             : 
      25           0 :         if (policy == SCHED_FIFO || policy == SCHED_RR)
      26             :                 return true;
      27           0 :         if (policy == SCHED_DEADLINE)
      28             :                 return true;
      29             :         return false;
      30             : }
      31             : 
      32             : #ifdef CONFIG_RT_MUTEXES
      33             : /*
      34             :  * Must hold either p->pi_lock or task_rq(p)->lock.
      35             :  */
      36             : static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *p)
      37             : {
      38             :         return p->pi_top_task;
      39             : }
      40             : extern void rt_mutex_setprio(struct task_struct *p, struct task_struct *pi_task);
      41             : extern void rt_mutex_adjust_pi(struct task_struct *p);
      42             : #else
      43             : static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *task)
      44             : {
      45             :         return NULL;
      46             : }
      47             : # define rt_mutex_adjust_pi(p)          do { } while (0)
      48             : #endif
      49             : 
      50             : extern void normalize_rt_tasks(void);
      51             : 
      52             : 
      53             : /*
      54             :  * default timeslice is 100 msecs (used only for SCHED_RR tasks).
      55             :  * Timeslices get refilled after they expire.
      56             :  */
      57             : #define RR_TIMESLICE            (100 * HZ / 1000)
      58             : 
      59             : #endif /* _LINUX_SCHED_RT_H */