| | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| | 2 | #ifndef _KERNEL_SCHED_AUTOGROUP_H |
| | 3 | #define _KERNEL_SCHED_AUTOGROUP_H |
| | 4 | |
| | 5 | #ifdef CONFIG_SCHED_AUTOGROUP |
| | 6 | |
| | 7 | struct autogroup { |
| | 8 | /* |
| | 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. |
| | 12 | */ |
| | 13 | struct kref kref; |
| | 14 | struct task_group *tg; |
| | 15 | struct rw_semaphore lock; |
| | 16 | unsigned long id; |
| | 17 | int nice; |
| | 18 | }; |
| | 19 | |
| | 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 | |
| | 30 | static inline struct task_group * |
| | 31 | autogroup_task_group(struct task_struct *p, struct task_group *tg) |
| | 32 | { |
| | 33 | extern unsigned int sysctl_sched_autogroup_enabled; |
| | 34 | int enabled = READ_ONCE(sysctl_sched_autogroup_enabled); |
| | 35 | |
| | 36 | if (enabled && task_wants_autogroup(p, tg)) |
| | 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); |
| | 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) { } |
| | 48 | static inline bool task_group_is_autogroup(struct task_group *tg) |
| | 49 | { |
| | 50 | return 0; |
| | 51 | } |
| | 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 | |
| | 59 | static inline int autogroup_path(struct task_group *tg, char *buf, int buflen) |
| | 60 | { |
| | 61 | return 0; |
| | 62 | } |
| | 63 | |
| | 64 | #endif /* CONFIG_SCHED_AUTOGROUP */ |
| | 65 | |
| | 66 | #endif /* _KERNEL_SCHED_AUTOGROUP_H */ |
projects / linux-2.6-block.git / blame_incremental