32 	struct cls_cgroup_head *head = rcu_dereference_bh(tp->root);  in cls_cgroup_classify()  local
37 	if (!tcf_em_tree_match(skb, &head->ematches, NULL))  in cls_cgroup_classify()
43 	return tcf_exts_exec(skb, &head->exts, res);  in cls_cgroup_classify()
62 	struct cls_cgroup_head *head = container_of(root,  in cls_cgroup_destroy_rcu()  local
66 	tcf_exts_destroy(&head->exts);  in cls_cgroup_destroy_rcu()
67 	tcf_em_tree_destroy(&head->ematches);  in cls_cgroup_destroy_rcu()
68 	kfree(head);  in cls_cgroup_destroy_rcu()
77 	struct cls_cgroup_head *head = rtnl_dereference(tp->root);  in cls_cgroup_change()  local
86 	if (!head && !handle)  in cls_cgroup_change()
89 	if (head && handle != head->handle)  in cls_cgroup_change()
92 	new = kzalloc(sizeof(*head), GFP_KERNEL);  in cls_cgroup_change()
119 	if (head)  in cls_cgroup_change()
120 		call_rcu(&head->rcu, cls_cgroup_destroy_rcu);  in cls_cgroup_change()
129 	struct cls_cgroup_head *head = rtnl_dereference(tp->root);  in cls_cgroup_destroy()  local
134 	if (head) {  in cls_cgroup_destroy()
136 		call_rcu(&head->rcu, cls_cgroup_destroy_rcu);  in cls_cgroup_destroy()
148 	struct cls_cgroup_head *head = rtnl_dereference(tp->root);  in cls_cgroup_walk()  local
153 	if (arg->fn(tp, (unsigned long) head, arg) < 0) {  in cls_cgroup_walk()
164 	struct cls_cgroup_head *head = rtnl_dereference(tp->root);  in cls_cgroup_dump()  local
167 	t->tcm_handle = head->handle;  in cls_cgroup_dump()
173 	if (tcf_exts_dump(skb, &head->exts) < 0 ||  in cls_cgroup_dump()
174 	    tcf_em_tree_dump(skb, &head->ematches, TCA_CGROUP_EMATCHES) < 0)  in cls_cgroup_dump()
179 	if (tcf_exts_dump_stats(skb, &head->exts) < 0)  in cls_cgroup_dump()