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    Subject[PATCH v3 04/10] sched/psi: move private helpers to sched/stats.h
    Date
    This patch move psi_task_change/psi_task_switch declarations out of
    PSI public header, since they are only needed for implementing the
    PSI stats tracking in sched/stats.h

    psi_task_switch is obvious, psi_task_change can't be public helper
    since it doesn't check psi_disabled static key. And there is no
    any user now, so put it in sched/stats.h too.

    Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
    Acked-by: Johannes Weiner <hannes@cmpxchg.org>
    ---
    include/linux/psi.h | 4 ----
    kernel/sched/stats.h | 4 ++++
    2 files changed, 4 insertions(+), 4 deletions(-)

    diff --git a/include/linux/psi.h b/include/linux/psi.h
    index dd74411ac21d..fffd229fbf19 100644
    --- a/include/linux/psi.h
    +++ b/include/linux/psi.h
    @@ -18,10 +18,6 @@ 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);

    diff --git a/kernel/sched/stats.h b/kernel/sched/stats.h
    index baa839c1ba96..c39b467ece43 100644
    --- a/kernel/sched/stats.h
    +++ b/kernel/sched/stats.h
    @@ -107,6 +107,10 @@ __schedstats_from_se(struct sched_entity *se)
    }

    #ifdef CONFIG_PSI
    +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);
    +
    /*
    * PSI tracks state that persists across sleeps, such as iowaits and
    * memory stalls. As a result, it has to distinguish between sleeps,
    --
    2.37.2
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