static void *xt_table_seq_start(struct seq_file *seq, loff_t *pos)
{
	struct net *net = seq_file_net(seq);
	u_int8_t af = (unsigned long)PDE_DATA(file_inode(seq->file));

	mutex_lock(&xt[af].mutex);
	return seq_list_start(&net->xt.tables[af], *pos);
}
static void *xt_table_seq_start(struct seq_file *seq, loff_t *pos)
{
	struct net *net = seq_file_net(seq);
	u_int8_t af = (unsigned long)PDE_DATA(file_inode(seq->file));

	mutex_lock(&xt[af].mutex);
	return seq_list_start(&net->xt.tables[af], *pos);
}