nand flash's size overflow

[marco.qu]

Hi,all
  I'm using two 4G Bbyte nand flash chip (totally 8GB) under kernel 2.6.24.3, but the size and offset int the mtd and chip structures are int type(32 bit), so my flash's size if overflow. is there an official way to solve this problem?

Thanks!!

                                                                                                       marco
                                                                                                            2007-5-5