lastpg
page = lastpg(blk) + 1;
lastpg(blk) = page + psize - 1;
for (page = firstpg(blk); page <= lastpg(blk); page++, idx++) {
for (page = firstpg(blk); page <= lastpg(blk); page++,
for (page = firstpg(blk); page <= lastpg(blk); page++)