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_tick(struct task_struct *task, int cpu); 24 void psi_memstall_enter(unsigned long *flags); 25 void psi_memstall_leave(unsigned long *flags); 26 27 int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res); 28 29 #ifdef CONFIG_CGROUPS 30 int psi_cgroup_alloc(struct cgroup *cgrp); 31 void psi_cgroup_free(struct cgroup *cgrp); 32 void cgroup_move_task(struct task_struct *p, struct css_set *to); 33 34 struct psi_trigger *psi_trigger_create(struct psi_group *group, 35 char *buf, size_t nbytes, enum psi_res res); 36 void psi_trigger_replace(void **trigger_ptr, struct psi_trigger *t); 37 38 __poll_t psi_trigger_poll(void **trigger_ptr, struct file *file, 39 poll_table *wait); 40 #endif 41 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 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 63 #endif /* CONFIG_PSI */ 64 65 #endif /* _LINUX_PSI_H */ 66