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 extern int rt_mutex_getprio(struct task_struct *p); 22 extern void rt_mutex_setprio(struct task_struct *p, int prio); 23 extern int rt_mutex_get_effective_prio(struct task_struct *task, int newprio); 24 extern struct task_struct *rt_mutex_get_top_task(struct task_struct *task); 25 extern void rt_mutex_adjust_pi(struct task_struct *p); 26 static inline bool tsk_is_pi_blocked(struct task_struct *tsk) 27 { 28 return tsk->pi_blocked_on != NULL; 29 } 30 #else 31 static inline int rt_mutex_getprio(struct task_struct *p) 32 { 33 return p->normal_prio; 34 } 35 36 static inline int rt_mutex_get_effective_prio(struct task_struct *task, 37 int newprio) 38 { 39 return newprio; 40 } 41 42 static inline struct task_struct *rt_mutex_get_top_task(struct task_struct *task) 43 { 44 return NULL; 45 } 46 # define rt_mutex_adjust_pi(p) do { } while (0) 47 static inline bool tsk_is_pi_blocked(struct task_struct *tsk) 48 { 49 return false; 50 } 51 #endif 52 53 extern void normalize_rt_tasks(void); 54 55 56 /* 57 * default timeslice is 100 msecs (used only for SCHED_RR tasks). 58 * Timeslices get refilled after they expire. 59 */ 60 #define RR_TIMESLICE (100 * HZ / 1000) 61 62 #endif /* _LINUX_SCHED_RT_H */ 63