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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; |
eb414681 JW |
19 | |
20 | void psi_init(void); | |
21 | ||
eb414681 JW |
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); |
aff03707 SB |
26 | struct psi_trigger *psi_trigger_create(struct psi_group *group, char *buf, |
27 | enum psi_res res, struct file *file, | |
28 | struct kernfs_open_file *of); | |
a06247c6 | 29 | void psi_trigger_destroy(struct psi_trigger *t); |
0e94682b SB |
30 | |
31 | __poll_t psi_trigger_poll(void **trigger_ptr, struct file *file, | |
32 | poll_table *wait); | |
51e50fbd SB |
33 | |
34 | #ifdef CONFIG_CGROUPS | |
57899a66 CZ |
35 | static inline struct psi_group *cgroup_psi(struct cgroup *cgrp) |
36 | { | |
37 | return cgroup_ino(cgrp) == 1 ? &psi_system : cgrp->psi; | |
38 | } | |
39 | ||
51e50fbd SB |
40 | int psi_cgroup_alloc(struct cgroup *cgrp); |
41 | void psi_cgroup_free(struct cgroup *cgrp); | |
42 | void cgroup_move_task(struct task_struct *p, struct css_set *to); | |
34f26a15 | 43 | void psi_cgroup_restart(struct psi_group *group); |
2ce7135a JW |
44 | #endif |
45 | ||
eb414681 JW |
46 | #else /* CONFIG_PSI */ |
47 | ||
48 | static inline void psi_init(void) {} | |
49 | ||
50 | static inline void psi_memstall_enter(unsigned long *flags) {} | |
51 | static inline void psi_memstall_leave(unsigned long *flags) {} | |
52 | ||
2ce7135a JW |
53 | #ifdef CONFIG_CGROUPS |
54 | static inline int psi_cgroup_alloc(struct cgroup *cgrp) | |
55 | { | |
56 | return 0; | |
57 | } | |
58 | static inline void psi_cgroup_free(struct cgroup *cgrp) | |
59 | { | |
60 | } | |
61 | static inline void cgroup_move_task(struct task_struct *p, struct css_set *to) | |
62 | { | |
63 | rcu_assign_pointer(p->cgroups, to); | |
64 | } | |
34f26a15 | 65 | static inline void psi_cgroup_restart(struct psi_group *group) {} |
2ce7135a JW |
66 | #endif |
67 | ||
eb414681 JW |
68 | #endif /* CONFIG_PSI */ |
69 | ||
70 | #endif /* _LINUX_PSI_H */ |