1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 /* 4 * SCHED_DEADLINE tasks has negative priorities, reflecting 5 * the fact that any of them has higher prio than RT and 6 * NORMAL/BATCH tasks. 7 */ 8 9 #include <linux/sched.h> 10 11 #define MAX_DL_PRIO 0 12 13 static inline int dl_prio(int prio) 14 { 15 if (unlikely(prio < MAX_DL_PRIO)) 16 return 1; 17 return 0; 18 } 19 20 static inline int dl_task(struct task_struct *p) 21 { 22 return dl_prio(p->prio); 23 } 24 25 static inline bool dl_time_before(u64 a, u64 b) 26 { 27 return (s64)(a - b) < 0; 28 } 29 30 #ifdef CONFIG_SMP 31 32 struct root_domain; 33 extern void dl_add_task_root_domain(struct task_struct *p); 34 extern void dl_clear_root_domain(struct root_domain *rd); 35 36 #endif /* CONFIG_SMP */ 37