POOL_TO_MARKER
na[0] = POOL_TO_MARKER(pp);
if (na[0] != POOL_TO_MARKER(pp) || na[1] != 0) {
na[0] = POOL_TO_MARKER(pp);
na[0] = POOL_TO_MARKER(pp);
if (na[0] != POOL_TO_MARKER(pp))
np->uln_next = POOL_TO_MARKER(pp);
if (np->uln_next != POOL_TO_MARKER(pp) ||
if (np->uln_next != POOL_TO_MARKER(lp->ul_pool) ||
np->uln_next = POOL_TO_MARKER(lp->ul_pool);