META_MEM_BYTES_PER_ROW
return (row <= addr) && (addr < row + META_MEM_BYTES_PER_ROW);
row = (void *)round_down((unsigned long)addr, META_MEM_BYTES_PER_ROW)
- META_ROWS_AROUND_ADDR * META_MEM_BYTES_PER_ROW;
row += META_MEM_BYTES_PER_ROW;