linux-kernel - [PATCH v3 04/10] sched/psi: move private helpers to sched/stats.h

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Date:   Wed, 24 Aug 2022 16:18:23 +0800
From:   Chengming Zhou <zhouchengming@...edance.com>
To:     tj@...nel.org, hannes@...xchg.org, mkoutny@...e.com,
        surenb@...gle.com
Cc:     gregkh@...uxfoundation.org, corbet@....net, mingo@...hat.com,
        peterz@...radead.org, songmuchun@...edance.com,
        cgroups@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Chengming Zhou <zhouchengming@...edance.com>
Subject: [PATCH v3 04/10] sched/psi: move private helpers to sched/stats.h

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@...edance.com>
Acked-by: Johannes Weiner <hannes@...xchg.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