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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
5091faa4 MG |
2 | #ifdef CONFIG_SCHED_AUTOGROUP |
3 | ||
4 | struct autogroup { | |
c1ad41f1 | 5 | /* |
97fb7a0a IM |
6 | * Reference doesn't mean how many threads attach to this |
7 | * autogroup now. It just stands for the number of tasks | |
8 | * which could use this autogroup. | |
c1ad41f1 | 9 | */ |
5091faa4 MG |
10 | struct kref kref; |
11 | struct task_group *tg; | |
12 | struct rw_semaphore lock; | |
13 | unsigned long id; | |
14 | int nice; | |
15 | }; | |
16 | ||
029632fb PZ |
17 | extern void autogroup_init(struct task_struct *init_task); |
18 | extern void autogroup_free(struct task_group *tg); | |
19 | ||
20 | static inline bool task_group_is_autogroup(struct task_group *tg) | |
21 | { | |
22 | return !!tg->autogroup; | |
23 | } | |
24 | ||
25 | extern bool task_wants_autogroup(struct task_struct *p, struct task_group *tg); | |
26 | ||
5091faa4 | 27 | static inline struct task_group * |
029632fb PZ |
28 | autogroup_task_group(struct task_struct *p, struct task_group *tg) |
29 | { | |
316c1608 | 30 | int enabled = READ_ONCE(sysctl_sched_autogroup_enabled); |
c1ad41f1 IM |
31 | |
32 | if (enabled && task_wants_autogroup(p, tg)) | |
029632fb PZ |
33 | return p->signal->autogroup->tg; |
34 | ||
35 | return tg; | |
36 | } | |
37 | ||
38 | extern int autogroup_path(struct task_group *tg, char *buf, int buflen); | |
5091faa4 MG |
39 | |
40 | #else /* !CONFIG_SCHED_AUTOGROUP */ | |
41 | ||
42 | static inline void autogroup_init(struct task_struct *init_task) { } | |
43 | static inline void autogroup_free(struct task_group *tg) { } | |
f4493771 MG |
44 | static inline bool task_group_is_autogroup(struct task_group *tg) |
45 | { | |
46 | return 0; | |
47 | } | |
5091faa4 MG |
48 | |
49 | static inline struct task_group * | |
50 | autogroup_task_group(struct task_struct *p, struct task_group *tg) | |
51 | { | |
52 | return tg; | |
53 | } | |
54 | ||
5091faa4 MG |
55 | static inline int autogroup_path(struct task_group *tg, char *buf, int buflen) |
56 | { | |
57 | return 0; | |
58 | } | |
5091faa4 MG |
59 | |
60 | #endif /* CONFIG_SCHED_AUTOGROUP */ |