LXR linux/include/linux/psi.h

   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
   9struct seq_file;
  10struct css_set;
  11
  12#ifdef CONFIG_PSI
  13
  14extern struct static_key_false psi_disabled;
  15extern struct psi_group psi_system;
  16
  17void psi_init(void);
  18
  19void psi_task_change(struct task_struct *task, int clear, int set);
  20void psi_task_switch(struct task_struct *prev, struct task_struct *next,
  21                     bool sleep);
  22
  23void psi_memstall_enter(unsigned long *flags);
  24void psi_memstall_leave(unsigned long *flags);
  25
  26int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res);
  27
  28#ifdef CONFIG_CGROUPS
  29int psi_cgroup_alloc(struct cgroup *cgrp);
  30void psi_cgroup_free(struct cgroup *cgrp);
  31void cgroup_move_task(struct task_struct *p, struct css_set *to);
  32
  33struct psi_trigger *psi_trigger_create(struct psi_group *group,
  34                        char *buf, size_t nbytes, enum psi_res res);
  35void 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
  43static inline void psi_init(void) {}
  44
  45static inline void psi_memstall_enter(unsigned long *flags) {}
  46static inline void psi_memstall_leave(unsigned long *flags) {}
  47
  48#ifdef CONFIG_CGROUPS
  49static inline int psi_cgroup_alloc(struct cgroup *cgrp)
  50{
  51        return 0;
  52}
  53static inline void psi_cgroup_free(struct cgroup *cgrp)
  54{
  55}
  56static 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