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