CTLLEAFIND
if (unlikely(leafidx != CTLLEAFIND)) {
leafidx, CTLLEAFIND);
l2leaf = l2dcp->stree + CTLLEAFIND + k;
l1leaf = l1dcp->stree + CTLLEAFIND + j;
l1leaf = l1dcp->stree + CTLLEAFIND;
l0leaf = l0dcp->stree + CTLLEAFIND + i;
l0leaf = l0dcp->stree + CTLLEAFIND;
dcp->leafidx = cpu_to_le32(CTLLEAFIND);
cp = &dcp->stree[CTLLEAFIND + i];