DEHASH
for (dep = DEHASH(dev, dirclust, diroff); dep; dep = dep->de_next) {
for (dep = DEHASH(dev, dirclust, diroff); dep;
depp = &DEHASH(dep->de_dev, dep->de_dirclust, dep->de_diroffset);
depp = &DEHASH(dep->de_dev, dep->de_dirclust, dep->de_diroffset);