On Thu, Jun 3, 2021 at 10:05 PM Stephen Boyd <sboyd@kernel.org> wrote:

> Quoting kernel test robot (2021-06-03 07:58:13)
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-versatile
> > head:   419b3ab6987f2a108cc4710030184365b17467ac
> > commit: 419b3ab6987f2a108cc4710030184365b17467ac [1/1] clk: versatile: remove dependency on ARCH_*
> > config: s390-allmodconfig (attached as .config)
> > compiler: s390-linux-gcc (GCC) 9.3.0
> > reproduce (this is a W=1 build):
> >         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         # https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/commit/?id=419b3ab6987f2a108cc4710030184365b17467ac
> >         git remote add clk https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git
> >         git fetch --no-tags clk clk-versatile
> >         git checkout 419b3ab6987f2a108cc4710030184365b17467ac
> >         # save the attached .config to linux build tree
> >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390
> >
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kernel test robot <lkp@intel.com>
>
> Probably ought to depend on HAS_IOMEM. Linus or Lee?

Probably! Not that I know how S390 access it's IO (Arnd knows)
I bet it has big iron port-mapped IO or something.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
for the patch.

Yours,
Linus Walleij