snd_compr_tstamp(struct snd_compr_stream *stream, unsigned long arg)
{
	struct snd_compr_tstamp tstamp = {0};
	int ret;

	ret = snd_compr_update_tstamp(stream, &tstamp);
	if (ret == 0)
		ret = copy_to_user((struct snd_compr_tstamp __user *)arg,
			&tstamp, sizeof(tstamp)) ? -EFAULT : 0;
	return ret;
}

Unknown