static struct calipso_doi *calipso_doi_search(u32 doi)
{
	struct calipso_doi *iter;

	list_for_each_entry_rcu(iter, &calipso_doi_list, list)
		if (iter->doi == doi && refcount_read(&iter->refcount))
			return iter;
	return NULL;
}
static struct calipso_doi *calipso_doi_search(u32 doi)
{
	struct calipso_doi *iter;

	list_for_each_entry_rcu(iter, &calipso_doi_list, list)
		if (iter->doi == doi && refcount_read(&iter->refcount))
			return iter;
	return NULL;
}