diff options
Diffstat (limited to 'include/linux/sched/deadline.h')
| -rw-r--r-- | include/linux/sched/deadline.h | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/include/linux/sched/deadline.h b/include/linux/sched/deadline.h index f9aabbc9d22e..1198138cb839 100644 --- a/include/linux/sched/deadline.h +++ b/include/linux/sched/deadline.h @@ -29,16 +29,39 @@ static inline bool dl_time_before(u64 a, u64 b) return (s64)(a - b) < 0; } -#ifdef CONFIG_SMP - struct root_domain; extern void dl_add_task_root_domain(struct task_struct *p); extern void dl_clear_root_domain(struct root_domain *rd); extern void dl_clear_root_domain_cpu(int cpu); -#endif /* CONFIG_SMP */ - extern u64 dl_cookie; extern bool dl_bw_visited(int cpu, u64 cookie); +static inline bool dl_server(struct sched_dl_entity *dl_se) +{ + return dl_se->dl_server; +} + +static inline struct task_struct *dl_task_of(struct sched_dl_entity *dl_se) +{ + BUG_ON(dl_server(dl_se)); + return container_of(dl_se, struct task_struct, dl); +} + +/* + * Regarding the deadline, a task with implicit deadline has a relative + * deadline == relative period. A task with constrained deadline has a + * relative deadline <= relative period. + * + * We support constrained deadline tasks. However, there are some restrictions + * applied only for tasks which do not have an implicit deadline. See + * update_dl_entity() to know more about such restrictions. + * + * The dl_is_implicit() returns true if the task has an implicit deadline. + */ +static inline bool dl_is_implicit(struct sched_dl_entity *dl_se) +{ + return dl_se->dl_deadline == dl_se->dl_period; +} + #endif /* _LINUX_SCHED_DEADLINE_H */ |