[tip:sched/core] cgroup: Kill subsys.active flag

[tip-bot for Li Zefan <tipbot@zytor.com>]

Commit-ID:  479f614110b889d5783acdaec865ede3cdb96b97
Gitweb:     http://git.kernel.org/tip/479f614110b889d5783acdaec865ede3cdb96b97
Author:     Li Zefan <lizefan@huawei.com>
AuthorDate: Fri, 29 Mar 2013 14:44:42 +0800
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Wed, 10 Apr 2013 13:54:22 +0200

cgroup: Kill subsys.active flag

The only user was cpuacct.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Li Zefan <lizefan@huawei.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/5155385A.4040207@huawei.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 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 900af59..95c02c0 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -458,7 +458,6 @@ 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 a32f943..5c46281 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -4468,7 +4468,6 @@ 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);
@@ -4573,7 +4572,6 @@ 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;
@@ -4614,7 +4612,6 @@ void cgroup_unload_subsys(struct cgroup_subsys *ss)
 	mutex_lock(&cgroup_mutex);
 
 	offline_css(ss, dummytop);
-	ss->active = 0;
 
 	if (ss->use_id)
 		idr_destroy(&ss->idr);