page_nextn
pp = page_nextn(pp, cnt);
return (page_nextn(cur, 1));
regionstart = page_nextn(first, offset);
regionend = page_nextn(first, looppages - 1);
regionend = page_nextn(regionstart, span - 1);
fhand = page_nextn(bhand, handspreadpages);
page_t *page_nextn(page_t *, ulong_t);
return (page_nextn(pp, 1));