On 2019/10/12 0:57, Jerome Pouiller wrote:
> On Friday 11 October 2019 18:38:17 CEST zhong jiang wrote:
>> I hit the following error when compile the kernel.
>>
>> drivers/staging/wfx/main.o: In function `wfx_core_init':
>> /home/z00352263/linux-next/linux-next/drivers/staging/wfx/main.c:488: undefined reference to `sdio_register_driver'
>> drivers/staging/wfx/main.o: In function `wfx_core_exit':
>> /home/z00352263/linux-next/linux-next/drivers/staging/wfx/main.c:496: undefined reference to `sdio_unregister_driver'
>> drivers/staging/wfx/main.o:(.debug_addr+0x1a8): undefined reference to `sdio_register_driver'
>> drivers/staging/wfx/main.o:(.debug_addr+0x6f0): undefined reference to `sdio_unregister_driver'
> For information, I cannot reproduce your issue (it does not mean that
> the issue does not exist). In add, if you obtain undefined references,
> it should only happen when CONFIG_MMC is not defined.
I attach the config,  you can test it and reproduce the issue.

Thanks,
zhogn jiang
> Can you check that your Modules.symvers is up-to-date (by running a
> 'make modules') ?
>
>