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 43 static inline void psi_init(void) {} 44 45 static inline void psi_memstall_enter(unsigned long *flags) {} 46 static inline void psi_memstall_leave(unsigned long *flags) {} 47 48 #ifdef CONFIG_CGROUPS 49 static inline int psi_cgroup_alloc(struct cgroup *cgrp) 50 { 51 return 0; 52 } 53 static inline void psi_cgroup_free(struct cgroup *cgrp) 54 { 55 } 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