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cgroup: relocate cgroup_rm_cftypes()

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cftype handling is about to be revamped.  Relocate cgroup_rm_cftypes()
above cgroup_add_cftypes() in preparation.  This is pure relocation.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
This commit is contained in:
Tejun Heo 2014-02-12 09:29:48 -05:00
parent 86bf4b6875
commit 80b1358699
1 changed files with 35 additions and 35 deletions
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70
kernel/cgroup.c
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@ -2417,6 +2417,41 @@ static int cgroup_init_cftypes(struct cgroup_subsys *ss, struct cftype *cfts)
return 0;
}
/**
* cgroup_rm_cftypes - remove an array of cftypes from a subsystem
* @cfts: zero-length name terminated array of cftypes
*
* Unregister @cfts. Files described by @cfts are removed from all
* existing cgroups and all future cgroups won't have them either. This
* function can be called anytime whether @cfts' subsys is attached or not.
*
* Returns 0 on successful unregistration, -ENOENT if @cfts is not
* registered.
*/
int cgroup_rm_cftypes(struct cftype *cfts)
{
struct cftype *found = NULL;
struct cftype_set *set;
if (!cfts || !cfts[0].ss)
return -ENOENT;
cgroup_cfts_prepare();
list_for_each_entry(set, &cfts[0].ss->cftsets, node) {
if (set->cfts == cfts) {
list_del(&set->node);
kfree(set);
found = cfts;
break;
}
}
cgroup_cfts_commit(found, false);
cgroup_exit_cftypes(cfts);
return found ? 0 : -ENOENT;
}
/**
* cgroup_add_cftypes - add an array of cftypes to a subsystem
* @ss: target cgroup subsystem
@ -2454,41 +2489,6 @@ int cgroup_add_cftypes(struct cgroup_subsys *ss, struct cftype *cfts)
}
EXPORT_SYMBOL_GPL(cgroup_add_cftypes);
/**
* cgroup_rm_cftypes - remove an array of cftypes from a subsystem
* @cfts: zero-length name terminated array of cftypes
*
* Unregister @cfts. Files described by @cfts are removed from all
* existing cgroups and all future cgroups won't have them either. This
* function can be called anytime whether @cfts' subsys is attached or not.
*
* Returns 0 on successful unregistration, -ENOENT if @cfts is not
* registered.
*/
int cgroup_rm_cftypes(struct cftype *cfts)
{
struct cftype *found = NULL;
struct cftype_set *set;
if (!cfts || !cfts[0].ss)
return -ENOENT;
cgroup_cfts_prepare();
list_for_each_entry(set, &cfts[0].ss->cftsets, node) {
if (set->cfts == cfts) {
list_del(&set->node);
kfree(set);
found = cfts;
break;
}
}
cgroup_cfts_commit(found, false);
cgroup_exit_cftypes(cfts);
return found ? 0 : -ENOENT;
}
/**
* cgroup_task_count - count the number of tasks in a cgroup.
* @cgrp: the cgroup in question