1 #ifndef _LINUX_PSI_H
2 #define _LINUX_PSI_H
3
4 #include <linux/jump_label.h>
5 #include <linux/psi_types.h>
6 #include <linux/sched.h>
7 #include <linux/poll.h>
8
9 struct seq_file;
10 struct css_set;
11
12 #ifdef CONFIG_PSI
13
14 extern struct static_key_false psi_disabled;
15 extern struct psi_group psi_system;
16
17 void psi_init(void);
18
19 void psi_task_change(struct task_struct *task, int clear, int set);
20 void psi_task_switch(struct task_struct *prev, struct task_struct *next,
21 bool sleep);
22
23 void psi_memstall_enter(unsigned long *flags);
24 void psi_memstall_leave(unsigned long *flags);
25
26 int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res);
27
28 #ifdef CONFIG_CGROUPS
29 int psi_cgroup_alloc(struct cgroup *cgrp);
30 void psi_cgroup_free(struct cgroup *cgrp);
31 void cgroup_move_task(struct task_struct *p, struct css_set *to);
32
33 struct psi_trigger *psi_trigger_create(struct psi_group *group,
34 char *buf, size_t nbytes, enum psi_res res);
35 void psi_trigger_replace(void **trigger_ptr, struct psi_trigger *t);
36
37 __poll_t psi_trigger_poll(void **trigger_ptr, struct file *file,
38 poll_table *wait);
39 #endif
40
41 #else /* CONFIG_PSI */
42
psi_init(void)43 static inline void psi_init(void) {}
44
psi_memstall_enter(unsigned long * flags)45 static inline void psi_memstall_enter(unsigned long *flags) {}
psi_memstall_leave(unsigned long * flags)46 static inline void psi_memstall_leave(unsigned long *flags) {}
47
48 #ifdef CONFIG_CGROUPS
psi_cgroup_alloc(struct cgroup * cgrp)49 static inline int psi_cgroup_alloc(struct cgroup *cgrp)
50 {
51 return 0;
52 }
psi_cgroup_free(struct cgroup * cgrp)53 static inline void psi_cgroup_free(struct cgroup *cgrp)
54 {
55 }
cgroup_move_task(struct task_struct * p,struct css_set * to)56 static inline void cgroup_move_task(struct task_struct *p, struct css_set *to)
57 {
58 rcu_assign_pointer(p->cgroups, to);
59 }
60 #endif
61
62 #endif /* CONFIG_PSI */
63
64 #endif /* _LINUX_PSI_H */
65