[kbuild-all] Re: [PATCH v3 3/3] asm-generic/io.h: Silence -Wnull-pointer-arithmetic warning on PCI_IOBASE

Hi Niklas, I love your patch! Yet something to improve: [auto build test ERROR on soc/for-next] [also build test ERROR on asm-generic/master v5.12-rc8 next-20210421] [cannot apply to arc/for-next sparc-next/master] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Niklas-Schnelle/asm-generic-io-h... base: https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next config: riscv-nommu_k210_defconfig (attached as .config) compiler: riscv64-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://github.com/0day-ci/linux/commit/05bc9b9b640336015712d139ebc42830d... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Niklas-Schnelle/asm-generic-io-h-Silence-Wnull-pointer-arithmetic-warning-on-PCI_IOBASE/20210421-192025 git checkout 05bc9b9b640336015712d139ebc42830d12a82da # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/riscv/include/asm/clint.h:10, from arch/riscv/include/asm/timex.h:15, from include/linux/timex.h:65, from include/linux/time32.h:13, from include/linux/time.h:60, from include/linux/stat.h:19, from include/linux/module.h:13, from init/main.c:17: include/asm-generic/io.h: In function 'inb_p': > > arch/riscv/include/asm/io.h:55:65: error: 'PCI_IOBASE' undeclared (first use in this function) 55 | #define inb(c) ({ u8 __v; __io_pbr(); __v = readb_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })