1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_PSI_H 3 #define _LINUX_PSI_H 4 5 #include <linux/jump_label.h> 6 #include <linux/psi_types.h> 7 #include <linux/sched.h> 8 #include <linux/poll.h> 9 #include <linux/cgroup-defs.h> 10 11 struct seq_file; 12 struct css_set; 13 14 #ifdef CONFIG_PSI 15 16 extern struct static_key_false psi_disabled; 17 extern struct psi_group psi_system; 18 19 void psi_init(void); 20 21 void psi_memstall_enter(unsigned long *flags); 22 void psi_memstall_leave(unsigned long *flags); 23 24 int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res); 25 struct psi_trigger *psi_trigger_create(struct psi_group *group, 26 char *buf, enum psi_res res); 27 void psi_trigger_destroy(struct psi_trigger *t); 28 29 __poll_t psi_trigger_poll(void **trigger_ptr, struct file *file, 30 poll_table *wait); 31 32 #ifdef CONFIG_CGROUPS 33 int psi_cgroup_alloc(struct cgroup *cgrp); 34 void psi_cgroup_free(struct cgroup *cgrp); 35 void cgroup_move_task(struct task_struct *p, struct css_set *to); 36 #endif 37 38 #else /* CONFIG_PSI */ 39 40 static inline void psi_init(void) {} 41 42 static inline void psi_memstall_enter(unsigned long *flags) {} 43 static inline void psi_memstall_leave(unsigned long *flags) {} 44 45 #ifdef CONFIG_CGROUPS 46 static inline int psi_cgroup_alloc(struct cgroup *cgrp) 47 { 48 return 0; 49 } 50 static inline void psi_cgroup_free(struct cgroup *cgrp) 51 { 52 } 53 static inline void cgroup_move_task(struct task_struct *p, struct css_set *to) 54 { 55 rcu_assign_pointer(p->cgroups, to); 56 } 57 #endif 58 59 #endif /* CONFIG_PSI */ 60 61 #endif /* _LINUX_PSI_H */ 62