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

kbuild test robot [off-list ref] 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 <redacted>

All errors (new ones prefixed by >>):

   kernel/dma/swiotlb.c: In function 'swiotlb_tbl_map_single':

quoted

quoted

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