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sched/deadline: Move some utility functions to deadline.h

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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 <juri.lelli@redhat.com>
Link: https://lore.kernel.org/r/20260330111010.153663-12-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>
This commit is contained in:
Gabriele Monaco
2026-03-30 13:10:09 +02:00
parent 820725b0eb
commit c85dbddad7
2 changed files with 28 additions and 27 deletions
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27
include/linux/sched/deadline.h
View File

@@ -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 */

28
kernel/sched/deadline.c
View File

@@ -18,6 +18,7 @@
#include <linux/cpuset.h>
#include <linux/sched/clock.h>
#include <linux/sched/deadline.h>
#include <uapi/linux/sched/types.h>
#include "sched.h"
#include "pelt.h"
@@ -57,17 +58,6 @@ static int __init sched_dl_sysctl_init(void)
late_initcall(sched_dl_sysctl_init);
#endif /* CONFIG_SYSCTL */
static 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);
}
static inline struct rq *rq_of_dl_rq(struct dl_rq *dl_rq)
{
return container_of(dl_rq, struct rq, dl);
@@ -990,22 +980,6 @@ update_dl_revised_wakeup(struct sched_dl_entity *dl_se, struct rq *rq)
dl_se->runtime = (dl_se->dl_density * laxity) >> BW_SHIFT;
}
/*
* 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;
}
/*
* When a deadline entity is placed in the runqueue, its runtime and deadline
* might need to be updated. This is done by a CBS wake up rule. There are two