PTN_BRANCH
ok = ok && PTN_BRANCH_SLOT(parent, branch_slot) == PTN_BRANCH(ptn);
ok = ok && node != PTN_BRANCH(ptn);
return PTN_BRANCH(dst);
uintptr_t * const mask_nodep = ptree_find_branch(pt, PTN_BRANCH(mask));
KASSERT(*mask_nodep == PTN_BRANCH(mask));
*id->id_insertp = PTN_BRANCH(mask);
*id->id_insertp = PTN_BRANCH(target);
*id->id_insertp = PTN_BRANCH(target);
KASSERT(*nodep == PTN_BRANCH(target));
if (PTN_BRANCH(parent) == PTN_BRANCH_SLOT(target, PTN_BRANCH_POSITION(parent))) {
*nodep = PTN_BRANCH(parent);