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949c4c1889
commit51e50fbd3eupstream. When CONFIG_CGROUPS is disabled psi code generates the following warnings: kernel/sched/psi.c:1112:21: warning: no previous prototype for 'psi_trigger_create' [-Wmissing-prototypes] 1112 | struct psi_trigger *psi_trigger_create(struct psi_group *group, | ^~~~~~~~~~~~~~~~~~ kernel/sched/psi.c:1182:6: warning: no previous prototype for 'psi_trigger_destroy' [-Wmissing-prototypes] 1182 | void psi_trigger_destroy(struct psi_trigger *t) | ^~~~~~~~~~~~~~~~~~~ kernel/sched/psi.c:1249:10: warning: no previous prototype for 'psi_trigger_poll' [-Wmissing-prototypes] 1249 | __poll_t psi_trigger_poll(void **trigger_ptr, | ^~~~~~~~~~~~~~~~ Change the declarations of these functions in the header to provide the prototypes even when they are unused. Link: https://lkml.kernel.org/r/20220119223940.787748-2-surenb@google.com Fixes:0e94682b73("psi: introduce psi monitor") Signed-off-by: Suren Baghdasaryan <surenb@google.com> Reported-by: kernel test robot <lkp@intel.com> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
#ifndef _LINUX_PSI_H
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#define _LINUX_PSI_H
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#include <linux/jump_label.h>
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#include <linux/psi_types.h>
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#include <linux/sched.h>
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#include <linux/poll.h>
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struct seq_file;
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struct css_set;
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#ifdef CONFIG_PSI
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extern struct static_key_false psi_disabled;
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extern struct psi_group psi_system;
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void psi_init(void);
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void psi_task_change(struct task_struct *task, int clear, int set);
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void psi_task_switch(struct task_struct *prev, struct task_struct *next,
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bool sleep);
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void psi_memstall_enter(unsigned long *flags);
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void psi_memstall_leave(unsigned long *flags);
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int psi_show(struct seq_file *s, struct psi_group *group, enum psi_res res);
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struct psi_trigger *psi_trigger_create(struct psi_group *group,
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char *buf, size_t nbytes, enum psi_res res);
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void psi_trigger_destroy(struct psi_trigger *t);
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__poll_t psi_trigger_poll(void **trigger_ptr, struct file *file,
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poll_table *wait);
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#ifdef CONFIG_CGROUPS
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int psi_cgroup_alloc(struct cgroup *cgrp);
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void psi_cgroup_free(struct cgroup *cgrp);
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void cgroup_move_task(struct task_struct *p, struct css_set *to);
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#endif
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#else /* CONFIG_PSI */
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static inline void psi_init(void) {}
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static inline void psi_memstall_enter(unsigned long *flags) {}
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static inline void psi_memstall_leave(unsigned long *flags) {}
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#ifdef CONFIG_CGROUPS
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static inline int psi_cgroup_alloc(struct cgroup *cgrp)
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{
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return 0;
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}
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static inline void psi_cgroup_free(struct cgroup *cgrp)
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{
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}
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static inline void cgroup_move_task(struct task_struct *p, struct css_set *to)
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{
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rcu_assign_pointer(p->cgroups, to);
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}
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#endif
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#endif /* CONFIG_PSI */
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#endif /* _LINUX_PSI_H */
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