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- #ifndef _LINUX_PSI_H
- #define _LINUX_PSI_H
- #include <linux/jump_label.h>
- #include <linux/psi_types.h>
- #include <linux/sched.h>
- #include <linux/poll.h>
- struct seq_file;
- struct css_set;
- #ifdef CONFIG_PSI
- extern struct static_key_false psi_disabled;
- extern struct psi_group psi_system;
- void psi_init(void);
- void psi_task_change(struct task_struct *task, int clear, int set);
- void psi_task_switch(struct task_struct *prev, struct task_struct *next,
- bool sleep);
- void psi_memstall_tick(struct task_struct *task, int cpu);
- void psi_memstall_enter(unsigned long *flags);
- void psi_memstall_leave(unsigned long *flags);
- int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res);
- #ifdef CONFIG_CGROUPS
- int psi_cgroup_alloc(struct cgroup *cgrp);
- void psi_cgroup_free(struct cgroup *cgrp);
- void cgroup_move_task(struct task_struct *p, struct css_set *to);
- struct psi_trigger *psi_trigger_create(struct psi_group *group,
- char *buf, size_t nbytes, enum psi_res res);
- void psi_trigger_destroy(struct psi_trigger *t);
- __poll_t psi_trigger_poll(void **trigger_ptr, struct file *file,
- poll_table *wait);
- #endif
- #else /* CONFIG_PSI */
- static inline void psi_init(void) {}
- static inline void psi_memstall_enter(unsigned long *flags) {}
- static inline void psi_memstall_leave(unsigned long *flags) {}
- #ifdef CONFIG_CGROUPS
- static inline int psi_cgroup_alloc(struct cgroup *cgrp)
- {
- return 0;
- }
- static inline void psi_cgroup_free(struct cgroup *cgrp)
- {
- }
- static inline void cgroup_move_task(struct task_struct *p, struct css_set *to)
- {
- rcu_assign_pointer(p->cgroups, to);
- }
- #endif
- #endif /* CONFIG_PSI */
- #endif /* _LINUX_PSI_H */
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