linux-kernel - [PATCH 5/5] cgroup: Remove subsys.active flag

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Date:	Thu, 28 Mar 2013 15:21:49 +0800
From:	Li Zefan <lizefan@...wei.com>
To:	Ingo Molnar <mingo@...nel.org>, Tejun Heo <tj@...nel.org>
CC:	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Cgroups <cgroups@...r.kernel.org>
Subject: [PATCH 5/5] cgroup: Remove subsys.active flag

The only user was cpuacct.

Signed-off-by: Li Zefan <lizefan@...wei.com>
---
 include/linux/cgroup.h | 1 -
 kernel/cgroup.c        | 3 ---
 2 files changed, 4 deletions(-)

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 7d73905..a236a5b 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -457,7 +457,6 @@ struct cgroup_subsys {
 	void (*bind)(struct cgroup *root);
 
 	int subsys_id;
-	int active;
 	int disabled;
 	int early_init;
 	/*
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 4855892..64dd57d 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -4415,7 +4415,6 @@ static void __init cgroup_init_subsys(struct cgroup_subsys *ss)
 	 * need to invoke fork callbacks here. */
 	BUG_ON(!list_empty(&init_task.tasks));
 
-	ss->active = 1;
 	BUG_ON(online_css(ss, dummytop));
 
 	mutex_unlock(&cgroup_mutex);
@@ -4523,7 +4522,6 @@ int __init_or_module cgroup_load_subsys(struct cgroup_subsys *ss)
 	}
 	write_unlock(&css_set_lock);
 
-	ss->active = 1;
 	ret = online_css(ss, dummytop);
 	if (ret)
 		goto err_unload;
@@ -4565,7 +4563,6 @@ void cgroup_unload_subsys(struct cgroup_subsys *ss)
 	mutex_lock(&cgroup_mutex);
 
 	offline_css(ss, dummytop);
-	ss->active = 0;
 
 	if (ss->use_id) {
 		idr_remove_all(&ss->idr);
-- 
1.8.0.2
--
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