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cgroup: unexport cgroup_css()

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cgroup_css() no longer has any user left outside cgroup.c proper and
we don't want subsystems to grow new usages of the function.  cgroup
core should always provide the css to use to the subsystems, which
will make dynamic creation and destruction of css's across the
lifetime of a cgroup much more manageable than exposing the cgroup
directly to subsystems and let them dereference css's from it.

Make cgroup_css() a static function in cgroup.c.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
This commit is contained in:
Tejun Heo
2013-08-08 20:11:27 -04:00
parent d99c8727e7
commit 95109b627b
2 changed files with 13 additions and 13 deletions
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include/linux/cgroup.h
-13
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@@ -677,19 +677,6 @@ struct cgroup_subsys_state *css_parent(struct cgroup_subsys_state *css)
return &parent_cgrp->dummy_css;
}
/**
* cgroup_css - obtain a cgroup's css for the specified subsystem
* @cgrp: the cgroup of interest
* @subsys_id: the subsystem of interest
*
* Return @cgrp's css (cgroup_subsys_state) associated with @subsys_id.
*/
static inline struct cgroup_subsys_state *cgroup_css(struct cgroup *cgrp,
int subsys_id)
{
return cgrp->subsys[subsys_id];
}
/**
* task_css_set_check - obtain a task's css_set with extra access conditions
* @task: the task to obtain css_set for