projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 5091faa4 MG |
1 | #ifdef CONFIG_SCHED_AUTOGROUP |
| 2 | ||
| 029632fb PZ |
3 | #include <linux/kref.h> |
| 4 | #include <linux/rwsem.h> | |
| 4eb5aaa3 | 5 | #include <linux/sched/autogroup.h> |
| 029632fb | 6 | |
| 5091faa4 | 7 | struct autogroup { |
| c1ad41f1 IM |
8 | /* |
| 9 | * reference doesn't mean how many thread attach to this | |
| 10 | * autogroup now. It just stands for the number of task | |
| 11 | * could use this autogroup. | |
| 12 | */ | |
| 5091faa4 MG |
13 | struct kref kref; |
| 14 | struct task_group *tg; | |
| 15 | struct rw_semaphore lock; | |
| 16 | unsigned long id; | |
| 17 | int nice; | |
| 18 | }; | |
| 19 | ||
| 029632fb PZ |
20 | extern void autogroup_init(struct task_struct *init_task); |
| 21 | extern void autogroup_free(struct task_group *tg); | |
| 22 | ||
| 23 | static inline bool task_group_is_autogroup(struct task_group *tg) | |
| 24 | { | |
| 25 | return !!tg->autogroup; | |
| 26 | } | |
| 27 | ||
| 28 | extern bool task_wants_autogroup(struct task_struct *p, struct task_group *tg); | |
| 29 | ||
| 5091faa4 | 30 | static inline struct task_group * |
| 029632fb PZ |
31 | autogroup_task_group(struct task_struct *p, struct task_group *tg) |
| 32 | { | |
| 316c1608 | 33 | int enabled = READ_ONCE(sysctl_sched_autogroup_enabled); |
| c1ad41f1 IM |
34 | |
| 35 | if (enabled && task_wants_autogroup(p, tg)) | |
| 029632fb PZ |
36 | return p->signal->autogroup->tg; |
| 37 | ||
| 38 | return tg; | |
| 39 | } | |
| 40 | ||
| 41 | extern int autogroup_path(struct task_group *tg, char *buf, int buflen); | |
| 5091faa4 MG |
42 | |
| 43 | #else /* !CONFIG_SCHED_AUTOGROUP */ | |
| 44 | ||
| 45 | static inline void autogroup_init(struct task_struct *init_task) { } | |
| 46 | static inline void autogroup_free(struct task_group *tg) { } | |
| f4493771 MG |
47 | static inline bool task_group_is_autogroup(struct task_group *tg) |
| 48 | { | |
| 49 | return 0; | |
| 50 | } | |
| 5091faa4 MG |
51 | |
| 52 | static inline struct task_group * | |
| 53 | autogroup_task_group(struct task_struct *p, struct task_group *tg) | |
| 54 | { | |
| 55 | return tg; | |
| 56 | } | |
| 57 | ||
| 58 | #ifdef CONFIG_SCHED_DEBUG | |
| 59 | static inline int autogroup_path(struct task_group *tg, char *buf, int buflen) | |
| 60 | { | |
| 61 | return 0; | |
| 62 | } | |
| 63 | #endif | |
| 64 | ||
| 65 | #endif /* CONFIG_SCHED_AUTOGROUP */ |