projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| d90a2f16 IM |
2 | #ifndef _KERNEL_SCHED_AUTOGROUP_H |
| 3 | #define _KERNEL_SCHED_AUTOGROUP_H | |
| 4 | ||
| 5091faa4 MG |
5 | #ifdef CONFIG_SCHED_AUTOGROUP |
| 6 | ||
| 7 | struct autogroup { | |
| c1ad41f1 | 8 | /* |
| 97fb7a0a IM |
9 | * Reference doesn't mean how many threads attach to this |
| 10 | * autogroup now. It just stands for the number of tasks | |
| 11 | * which could use this autogroup. | |
| c1ad41f1 | 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 | { | |
| c8eaf6ac | 33 | extern unsigned int sysctl_sched_autogroup_enabled; |
| 316c1608 | 34 | int enabled = READ_ONCE(sysctl_sched_autogroup_enabled); |
| c1ad41f1 IM |
35 | |
| 36 | if (enabled && task_wants_autogroup(p, tg)) | |
| 029632fb PZ |
37 | return p->signal->autogroup->tg; |
| 38 | ||
| 39 | return tg; | |
| 40 | } | |
| 41 | ||
| 42 | extern int autogroup_path(struct task_group *tg, char *buf, int buflen); | |
| 5091faa4 MG |
43 | |
| 44 | #else /* !CONFIG_SCHED_AUTOGROUP */ | |
| 45 | ||
| 46 | static inline void autogroup_init(struct task_struct *init_task) { } | |
| 47 | static inline void autogroup_free(struct task_group *tg) { } | |
| f4493771 MG |
48 | static inline bool task_group_is_autogroup(struct task_group *tg) |
| 49 | { | |
| 50 | return 0; | |
| 51 | } | |
| 5091faa4 MG |
52 | |
| 53 | static inline struct task_group * | |
| 54 | autogroup_task_group(struct task_struct *p, struct task_group *tg) | |
| 55 | { | |
| 56 | return tg; | |
| 57 | } | |
| 58 | ||
| 5091faa4 MG |
59 | static inline int autogroup_path(struct task_group *tg, char *buf, int buflen) |
| 60 | { | |
| 61 | return 0; | |
| 62 | } | |
| 5091faa4 MG |
63 | |
| 64 | #endif /* CONFIG_SCHED_AUTOGROUP */ | |
| d90a2f16 IM |
65 | |
| 66 | #endif /* _KERNEL_SCHED_AUTOGROUP_H */ |