From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Fri, 16 Aug 2019 12:20:42 +0200
Subject: [PATCH 2/4] cgroup: Consolidate users of cgroup_rstat_lock.
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git
Git-commit: da77ceac3d20f27310a07a7c346a4ee6b40d6c28
Patch-mainline: Queued in subsystem maintainer repository
References: SLE Realtime Extensio

cgroup_rstat_flush_irqsafe() has no users, remove it.
cgroup_rstat_flush_hold() and cgroup_rstat_flush_release() are only used within
this file. Make it static.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Daniel Wagner <dwagner@suse.de>
---
 include/linux/cgroup.h |    3 ---
 kernel/cgroup/rstat.c  |   19 ++-----------------
 2 files changed, 2 insertions(+), 20 deletions(-)

--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -750,9 +750,6 @@ static inline void cgroup_path_from_kern
  */
 void cgroup_rstat_updated(struct cgroup *cgrp, int cpu);
 void cgroup_rstat_flush(struct cgroup *cgrp);
-void cgroup_rstat_flush_irqsafe(struct cgroup *cgrp);
-void cgroup_rstat_flush_hold(struct cgroup *cgrp);
-void cgroup_rstat_flush_release(void);
 
 /*
  * Basic resource stats.
--- a/kernel/cgroup/rstat.c
+++ b/kernel/cgroup/rstat.c
@@ -201,21 +201,6 @@ void cgroup_rstat_flush(struct cgroup *c
 }
 
 /**
- * cgroup_rstat_flush_irqsafe - irqsafe version of cgroup_rstat_flush()
- * @cgrp: target cgroup
- *
- * This function can be called from any context.
- */
-void cgroup_rstat_flush_irqsafe(struct cgroup *cgrp)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&cgroup_rstat_lock, flags);
-	cgroup_rstat_flush_locked(cgrp, false);
-	spin_unlock_irqrestore(&cgroup_rstat_lock, flags);
-}
-
-/**
  * cgroup_rstat_flush_begin - flush stats in @cgrp's subtree and hold
  * @cgrp: target cgroup
  *
@@ -224,7 +209,7 @@ void cgroup_rstat_flush_irqsafe(struct c
  *
  * This function may block.
  */
-void cgroup_rstat_flush_hold(struct cgroup *cgrp)
+static void cgroup_rstat_flush_hold(struct cgroup *cgrp)
 	__acquires(&cgroup_rstat_lock)
 {
 	might_sleep();
@@ -235,7 +220,7 @@ void cgroup_rstat_flush_hold(struct cgro
 /**
  * cgroup_rstat_flush_release - release cgroup_rstat_flush_hold()
  */
-void cgroup_rstat_flush_release(void)
+static void cgroup_rstat_flush_release(void)
 	__releases(&cgroup_rstat_lock)
 {
 	spin_unlock_irq(&cgroup_rstat_lock);