On Wed, Oct 23, 2019 at 9:11 PM kbuild test robot <lkp@intel.com> wrote:
>
> Hi Andrey,
>
> Thank you for the patch! Yet something to improve:
>
> [auto build test ERROR on linus/master]
> [cannot apply to v5.4-rc4 next-20191023]
> [if your patch is applied to the wrong git tree, please drop us a note to help
> improve the system. BTW, we also suggest to use '--base' option to specify the
> base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
>
> url:    https://github.com/0day-ci/linux/commits/Andrey-Konovalov/kcov-collect-coverage-from-usb-and-vhost/20191023-185245
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3b7c59a1950c75f2c0152e5a9cd77675b09233d6
> config: s390-allmodconfig (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@intel.com>
>
> All errors (new ones prefixed by >>):
>
> >> ERROR: "kcov_remote_stop" [drivers/usb/core/usbcore.ko] undefined!
> >> ERROR: "kcov_remote_start" [drivers/usb/core/usbcore.ko] undefined!

Indeed, we need EXPORT_SYMBOL() for kcov_common_handle(),
kcov_remote_start() and kcov_remote_stop(). Will fix in v3.

>
> ---
> 0-DAY kernel test infrastructure                Open Source Technology Center
> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation