From c85dbddad705babfbddfef182495994f7f5262c9 Mon Sep 17 00:00:00 2001 From: Gabriele Monaco Date: Mon, 30 Mar 2026 13:10:09 +0200 Subject: sched/deadline: Move some utility functions to deadline.h Some utility functions on sched_dl_entity can be useful outside of deadline.c , for instance for modelling, without relying on raw structure fields. Move functions like dl_task_of and dl_is_implicit to deadline.h to make them available outside. Acked-by: Juri Lelli Link: https://lore.kernel.org/r/20260330111010.153663-12-gmonaco@redhat.com Signed-off-by: Gabriele Monaco --- include/linux/sched/deadline.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'include/linux') diff --git a/include/linux/sched/deadline.h b/include/linux/sched/deadline.h index c40115d4e34d..1198138cb839 100644 --- a/include/linux/sched/deadline.h +++ b/include/linux/sched/deadline.h @@ -37,4 +37,31 @@ extern void dl_clear_root_domain_cpu(int cpu); 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 */ -- cgit v1.2.3