LOCHASH
lp->loc_next = dd_hash[LOCHASH(index)];
dd_hash[LOCHASH(index)] = lp;
for (lp = dd_hash[LOCHASH(loc)]; lp; lp = lp->loc_next) {
for (lp = dd_hash[LOCHASH(dirp->dd_lastseek)]; lp; lp = lp->loc_next) {