| #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 */ |
