diff options
| -rw-r--r-- | block/blk-cgroup.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 5fe03def34b2..2cc682b860ea 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -286,16 +286,16 @@ done: static struct cgroup_subsys_state * blkiocg_create(struct cgroup_subsys *subsys, struct cgroup *cgroup) { - struct blkio_cgroup *blkcg, *parent_blkcg; + struct blkio_cgroup *blkcg; + struct cgroup *parent = cgroup->parent; - if (!cgroup->parent) { + if (!parent) { blkcg = &blkio_root_cgroup; goto done; } /* Currently we do not support hierarchy deeper than two level (0,1) */ - parent_blkcg = cgroup_to_blkio_cgroup(cgroup->parent); - if (css_depth(&parent_blkcg->css) > 0) + if (parent != cgroup->top_cgroup) return ERR_PTR(-EINVAL); blkcg = kzalloc(sizeof(*blkcg), GFP_KERNEL); |