SQUARE
SQUARE(howmany(sblock.fs_bsize, sizeof(ufs1_daddr_t)))));
SQUARE(howmany(sblock.fs_bsize, sizeof(ufs2_daddr_t)))));
remaining_blocks -= SQUARE(howmany(sb->fs_bsize, sizeof(ufs1_daddr_t)));
remaining_blocks -= SQUARE(howmany(sb->fs_bsize, sizeof(ufs2_daddr_t)));