static int snd_seq_ioctl_system_info(struct snd_seq_client *client, void __user *arg)
{
	struct snd_seq_system_info info;

	memset(&info, 0, sizeof(info));
	/* fill the info fields */
	info.queues = SNDRV_SEQ_MAX_QUEUES;
	info.clients = SNDRV_SEQ_MAX_CLIENTS;
	info.ports = SNDRV_SEQ_MAX_PORTS;
	info.channels = 256;	/* fixed limit */
	info.cur_clients = client_usage.cur;
	info.cur_queues = snd_seq_queue_get_cur_queues();

	if (copy_to_user(arg, &info, sizeof(info)))
		return -EFAULT;
	return 0;
}

Unknown