67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _KERNEL_SCHED_AUTOGROUP_H
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#define _KERNEL_SCHED_AUTOGROUP_H
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#ifdef CONFIG_SCHED_AUTOGROUP
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struct autogroup {
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/*
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* Reference doesn't mean how many threads attach to this
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* autogroup now. It just stands for the number of tasks
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* which could use this autogroup.
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*/
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struct kref kref;
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struct task_group *tg;
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struct rw_semaphore lock;
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unsigned long id;
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int nice;
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};
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extern void autogroup_init(struct task_struct *init_task);
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extern void autogroup_free(struct task_group *tg);
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static inline bool task_group_is_autogroup(struct task_group *tg)
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{
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return !!tg->autogroup;
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}
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extern bool task_wants_autogroup(struct task_struct *p, struct task_group *tg);
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static inline struct task_group *
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autogroup_task_group(struct task_struct *p, struct task_group *tg)
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{
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extern unsigned int sysctl_sched_autogroup_enabled;
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int enabled = READ_ONCE(sysctl_sched_autogroup_enabled);
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if (enabled && task_wants_autogroup(p, tg))
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return p->signal->autogroup->tg;
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return tg;
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}
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extern int autogroup_path(struct task_group *tg, char *buf, int buflen);
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#else /* !CONFIG_SCHED_AUTOGROUP */
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static inline void autogroup_init(struct task_struct *init_task) { }
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static inline void autogroup_free(struct task_group *tg) { }
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static inline bool task_group_is_autogroup(struct task_group *tg)
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{
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return 0;
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}
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static inline struct task_group *
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autogroup_task_group(struct task_struct *p, struct task_group *tg)
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{
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return tg;
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}
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static inline int autogroup_path(struct task_group *tg, char *buf, int buflen)
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{
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return 0;
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}
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#endif /* CONFIG_SCHED_AUTOGROUP */
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#endif /* _KERNEL_SCHED_AUTOGROUP_H */
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