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2fb75e1b | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
eb414681 JW |
2 | #ifndef _LINUX_PSI_H |
3 | #define _LINUX_PSI_H | |
4 | ||
e0c27447 | 5 | #include <linux/jump_label.h> |
eb414681 JW |
6 | #include <linux/psi_types.h> |
7 | #include <linux/sched.h> | |
0e94682b | 8 | #include <linux/poll.h> |
3387ce4d | 9 | #include <linux/cgroup-defs.h> |
57899a66 | 10 | #include <linux/cgroup.h> |
eb414681 | 11 | |
2ce7135a JW |
12 | struct seq_file; |
13 | struct css_set; | |
14 | ||
eb414681 JW |
15 | #ifdef CONFIG_PSI |
16 | ||
e0c27447 | 17 | extern struct static_key_false psi_disabled; |
df5ba5be | 18 | extern struct psi_group psi_system; |
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19 | |
20 | void psi_init(void); | |
21 | ||
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22 | void psi_memstall_enter(unsigned long *flags); |
23 | void psi_memstall_leave(unsigned long *flags); | |
24 | ||
2ce7135a | 25 | int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res); |
0e94682b | 26 | struct psi_trigger *psi_trigger_create(struct psi_group *group, |
76b079ef | 27 | char *buf, enum psi_res res); |
a06247c6 | 28 | void psi_trigger_destroy(struct psi_trigger *t); |
0e94682b SB |
29 | |
30 | __poll_t psi_trigger_poll(void **trigger_ptr, struct file *file, | |
31 | poll_table *wait); | |
51e50fbd SB |
32 | |
33 | #ifdef CONFIG_CGROUPS | |
57899a66 CZ |
34 | static inline struct psi_group *cgroup_psi(struct cgroup *cgrp) |
35 | { | |
36 | return cgroup_ino(cgrp) == 1 ? &psi_system : cgrp->psi; | |
37 | } | |
38 | ||
51e50fbd SB |
39 | int psi_cgroup_alloc(struct cgroup *cgrp); |
40 | void psi_cgroup_free(struct cgroup *cgrp); | |
41 | void cgroup_move_task(struct task_struct *p, struct css_set *to); | |
34f26a15 | 42 | void psi_cgroup_restart(struct psi_group *group); |
2ce7135a JW |
43 | #endif |
44 | ||
eb414681 JW |
45 | #else /* CONFIG_PSI */ |
46 | ||
47 | static inline void psi_init(void) {} | |
48 | ||
49 | static inline void psi_memstall_enter(unsigned long *flags) {} | |
50 | static inline void psi_memstall_leave(unsigned long *flags) {} | |
51 | ||
2ce7135a JW |
52 | #ifdef CONFIG_CGROUPS |
53 | static inline int psi_cgroup_alloc(struct cgroup *cgrp) | |
54 | { | |
55 | return 0; | |
56 | } | |
57 | static inline void psi_cgroup_free(struct cgroup *cgrp) | |
58 | { | |
59 | } | |
60 | static inline void cgroup_move_task(struct task_struct *p, struct css_set *to) | |
61 | { | |
62 | rcu_assign_pointer(p->cgroups, to); | |
63 | } | |
34f26a15 | 64 | static inline void psi_cgroup_restart(struct psi_group *group) {} |
2ce7135a JW |
65 | #endif |
66 | ||
eb414681 JW |
67 | #endif /* CONFIG_PSI */ |
68 | ||
69 | #endif /* _LINUX_PSI_H */ |