Re: [PATCH 2/3] DMA mapping: Move SME handling to x86-specific files

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kbuild test robot <lkp@xxxxxxxxx> writes:

> Hi Thiago,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on linus/master]
> [cannot apply to v5.2 next-20190718]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>
> url:    https://github.com/0day-ci/linux/commits/Thiago-Jung-Bauermann/Remove-x86-specific-code-from-generic-headers/20190715-063006
> config: s390-allnoconfig (attached as .config)
> compiler: s390-linux-gcc (GCC) 7.4.0
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         GCC_VERSION=7.4.0 make.cross ARCH=s390
>
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@xxxxxxxxx>
>
> All errors (new ones prefixed by >>):
>
>    kernel/dma/swiotlb.c: In function 'swiotlb_tbl_map_single':
>>> kernel/dma/swiotlb.c:461:6: error: implicit declaration of function 'mem_encrypt_active'; did you mean 'set_cpu_active'? [-Werror=implicit-function-declaration]
>      if (mem_encrypt_active())
>          ^~~~~~~~~~~~~~~~~~
>          set_cpu_active
>    cc1: some warnings being treated as errors

This error was reported for v1 of the patch series. I wasn't able to
reproduce this problem on v1 but found a similar issue on v2.

I just did a build test of each patch of the latest version (v3) with an
s390 cross-toolchain and the config file from this report and didn't
find any build issues, so I believe this problem is solved.

--
Thiago Jung Bauermann
IBM Linux Technology Center



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