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 static inline bool dl_prio(int prio) 14 { 15 return unlikely(prio < MAX_DL_PRIO); 16 } 17 18 /* 19 * Returns true if a task has a priority that belongs to DL class. PI-boosted 20 * tasks will return true. Use dl_policy() to ignore PI-boosted tasks. 21 */ 22 static inline bool 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