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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> |
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6 | #include <linux/psi_types.h> |
7 | #include <linux/sched.h> | |
0e94682b | 8 | #include <linux/poll.h> |
3387ce4d | 9 | #include <linux/cgroup-defs.h> |
eb414681 | 10 | |
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11 | struct seq_file; |
12 | struct css_set; | |
13 | ||
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14 | #ifdef CONFIG_PSI |
15 | ||
e0c27447 | 16 | extern struct static_key_false psi_disabled; |
df5ba5be | 17 | extern struct psi_group psi_system; |
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18 | |
19 | void psi_init(void); | |
20 | ||
21 | void psi_task_change(struct task_struct *task, int clear, int set); | |
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22 | void psi_task_switch(struct task_struct *prev, struct task_struct *next, |
23 | bool sleep); | |
eb414681 | 24 | |
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25 | void psi_memstall_enter(unsigned long *flags); |
26 | void psi_memstall_leave(unsigned long *flags); | |
27 | ||
2ce7135a | 28 | int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res); |
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29 | struct psi_trigger *psi_trigger_create(struct psi_group *group, |
30 | char *buf, size_t nbytes, enum psi_res res); | |
a06247c6 | 31 | void psi_trigger_destroy(struct psi_trigger *t); |
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32 | |
33 | __poll_t psi_trigger_poll(void **trigger_ptr, struct file *file, | |
34 | poll_table *wait); | |
51e50fbd SB |
35 | |
36 | #ifdef CONFIG_CGROUPS | |
37 | int psi_cgroup_alloc(struct cgroup *cgrp); | |
38 | void psi_cgroup_free(struct cgroup *cgrp); | |
39 | void cgroup_move_task(struct task_struct *p, struct css_set *to); | |
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40 | #endif |
41 | ||
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42 | #else /* CONFIG_PSI */ |
43 | ||
44 | static inline void psi_init(void) {} | |
45 | ||
46 | static inline void psi_memstall_enter(unsigned long *flags) {} | |
47 | static inline void psi_memstall_leave(unsigned long *flags) {} | |
48 | ||
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49 | #ifdef CONFIG_CGROUPS |
50 | static inline int psi_cgroup_alloc(struct cgroup *cgrp) | |
51 | { | |
52 | return 0; | |
53 | } | |
54 | static inline void psi_cgroup_free(struct cgroup *cgrp) | |
55 | { | |
56 | } | |
57 | static inline void cgroup_move_task(struct task_struct *p, struct css_set *to) | |
58 | { | |
59 | rcu_assign_pointer(p->cgroups, to); | |
60 | } | |
61 | #endif | |
62 | ||
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63 | #endif /* CONFIG_PSI */ |
64 | ||
65 | #endif /* _LINUX_PSI_H */ |