| #ifdef CONFIG_SCHED_AUTOGROUP | |
| #include <linux/kref.h> | |
| #include <linux/rwsem.h> | |
| struct autogroup { | |
| /* | |
| * reference doesn't mean how many thread attach to this | |
| * autogroup now. It just stands for the number of task | |
| * could use this autogroup. | |
| */ | |
| struct kref kref; | |
| struct task_group *tg; | |
| struct rw_semaphore lock; | |
| unsigned long id; | |
| int nice; | |
| }; | |
| extern void autogroup_init(struct task_struct *init_task); | |
| extern void autogroup_free(struct task_group *tg); | |
| static inline bool task_group_is_autogroup(struct task_group *tg) | |
| { | |
| return !!tg->autogroup; | |
| } | |
| extern bool task_wants_autogroup(struct task_struct *p, struct task_group *tg); | |
| static inline struct task_group * | |
| autogroup_task_group(struct task_struct *p, struct task_group *tg) | |
| { | |
| int enabled = READ_ONCE(sysctl_sched_autogroup_enabled); | |
| if (enabled && task_wants_autogroup(p, tg)) | |
| return p->signal->autogroup->tg; | |
| return tg; | |
| } | |
| extern int autogroup_path(struct task_group *tg, char *buf, int buflen); | |
| #else /* !CONFIG_SCHED_AUTOGROUP */ | |
| static inline void autogroup_init(struct task_struct *init_task) { } | |
| static inline void autogroup_free(struct task_group *tg) { } | |
| static inline bool task_group_is_autogroup(struct task_group *tg) | |
| { | |
| return 0; | |
| } | |
| static inline struct task_group * | |
| autogroup_task_group(struct task_struct *p, struct task_group *tg) | |
| { | |
| return tg; | |
| } | |
| #ifdef CONFIG_SCHED_DEBUG | |
| static inline int autogroup_path(struct task_group *tg, char *buf, int buflen) | |
| { | |
| return 0; | |
| } | |
| #endif | |
| #endif /* CONFIG_SCHED_AUTOGROUP */ |