#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 = ACCESS_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 */