MDF_CONSISTENT
if (drbd_md_test_flag(nbc, MDF_CONSISTENT) && nsz < eff) {
if (drbd_md_test_flag(device->ldev, MDF_CONSISTENT)) {
(drbd_md_test_flag(device->ldev, MDF_CONSISTENT) &&
u32 mdf = device->ldev->md.flags & ~(MDF_CONSISTENT|MDF_PRIMARY_IND|
mdf |= MDF_CONSISTENT;