linux-stable/include/linux/psi.h
Ingo Molnar 3387ce4d8a headers/prep: Fix header to build standalone: <linux/psi.h>
Add the <linux/cgroup-defs.h> dependency to <linux/psi.h>, because
cgroup_move_task() will dereference 'struct css_set'.

( Only older toolchains are affected, due to variations in
  the implementation of rcu_assign_pointer() et al. )

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Sachin Sant <sachinp@linux.ibm.com>
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2022-03-21 11:13:49 +01:00

65 lines
1.6 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#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>
#include <linux/cgroup-defs.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_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);
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);
#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);
#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 */