OLQF_CLEAN
if (!(flags & OLQF_CLEAN))
ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
if (!(oinfo->dqi_flags & OLQF_CLEAN)) {
oinfo->dqi_flags &= ~OLQF_CLEAN;
oinfo->dqi_flags |= OLQF_CLEAN;