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Gabriele Monaco
c85dbddad7
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>
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_SCHED_DEADLINE_H
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#define _LINUX_SCHED_DEADLINE_H
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/*
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* SCHED_DEADLINE tasks has negative priorities, reflecting
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* the fact that any of them has higher prio than RT and
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* NORMAL/BATCH tasks.
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*/
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#include <linux/sched.h>
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static inline bool dl_prio(int prio)
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{
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return unlikely(prio < MAX_DL_PRIO);
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}
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/*
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* Returns true if a task has a priority that belongs to DL class. PI-boosted
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* tasks will return true. Use dl_policy() to ignore PI-boosted tasks.
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*/
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static inline bool dl_task(struct task_struct *p)
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{
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return dl_prio(p->prio);
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}
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static inline bool dl_time_before(u64 a, u64 b)
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{
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return (s64)(a - b) < 0;
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}
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struct root_domain;
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extern void dl_add_task_root_domain(struct task_struct *p);
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extern void dl_clear_root_domain(struct root_domain *rd);
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extern void dl_clear_root_domain_cpu(int cpu);
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extern u64 dl_cookie;
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extern bool dl_bw_visited(int cpu, u64 cookie);
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static inline bool dl_server(struct sched_dl_entity *dl_se)
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{
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return dl_se->dl_server;
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}
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static inline struct task_struct *dl_task_of(struct sched_dl_entity *dl_se)
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{
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BUG_ON(dl_server(dl_se));
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return container_of(dl_se, struct task_struct, dl);
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}
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/*
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* Regarding the deadline, a task with implicit deadline has a relative
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* deadline == relative period. A task with constrained deadline has a
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* relative deadline <= relative period.
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*
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* We support constrained deadline tasks. However, there are some restrictions
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* applied only for tasks which do not have an implicit deadline. See
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* update_dl_entity() to know more about such restrictions.
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*
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* The dl_is_implicit() returns true if the task has an implicit deadline.
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*/
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static inline bool dl_is_implicit(struct sched_dl_entity *dl_se)
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{
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return dl_se->dl_deadline == dl_se->dl_period;
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}
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#endif /* _LINUX_SCHED_DEADLINE_H */
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