static void tcf_chain_destroy(struct tcf_chain *chain, bool free_block)
{
	struct tcf_block *block = chain->block;

	mutex_destroy(&chain->filter_chain_lock);
	kfree_rcu(chain, rcu);
	if (free_block)
		tcf_block_destroy(block);
}
static void tcf_chain_destroy(struct tcf_chain *chain, bool free_block)
{
	struct tcf_block *block = chain->block;

	mutex_destroy(&chain->filter_chain_lock);
	kfree_rcu(chain, rcu);
	if (free_block)
		tcf_block_destroy(block);
}