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cgroup: export cgrp_dfl_root

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While cgroup subsystems can't be modules, blkcg supports dynamically
loadable policies which interact with cgroup core.  Export
cgrp_dfl_root so that cgroup_on_dfl() can be used in those modules.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
This commit is contained in:
Tejun Heo 2015-08-05 16:03:19 -04:00
parent 6abc8ca19d
commit d0ec4230a0
1 changed files with 1 additions and 0 deletions
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kernel/cgroup.c
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@ -145,6 +145,7 @@ static const char *cgroup_subsys_name[] = {
* part of that cgroup. * part of that cgroup.
*/ */
struct cgroup_root cgrp_dfl_root; struct cgroup_root cgrp_dfl_root;
EXPORT_SYMBOL_GPL(cgrp_dfl_root);
/* /*
* The default hierarchy always exists but is hidden until mounted for the * The default hierarchy always exists but is hidden until mounted for the