message: mm: Make align_down explicit
diff: @@ -217,7 +217,7 @@ pub fn init() {
  if has_1gib_pages
  && map_size > HugePageSize::SIZE as usize
  - && (map_addr.as_usize() & !(HugePageSize::SIZE as usize - 1)) == 0
  + && align_down!(map_addr.as_usize(), HugePageSize::SIZE as usize) == 0
  {
  let size = align_down!(map_size, HugePageSize::SIZE as usize);
  map_heap::<HugePageSize>(map_addr, size);
  