NETFS_FILL_WITH_ZEROES
ret = NETFS_FILL_WITH_ZEROES;
subreq->source = source = NETFS_FILL_WITH_ZEROES;
if (source == NETFS_FILL_WITH_ZEROES) {
subreq->source = NETFS_FILL_WITH_ZEROES;
EM(NETFS_FILL_WITH_ZEROES, "ZERO") \