Hi Niklas, I love your patch! Perhaps something to improve: [auto build test WARNING on soc/for-next] [also build test WARNING on asm-generic/master v5.13-rc1 next-20210510] [cannot apply to 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-Silence-Wnull-pointer-arithmetic-warning-on-PCI_IOBASE/20210510-165435 base: https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next config: openrisc-randconfig-r025-20210510 (attached as .config) compiler: or1k-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/fa75946a8988026bee808b5840438a3908f0a65b 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/20210510-165435 git checkout fa75946a8988026bee808b5840438a3908f0a65b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=openrisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from include/linux/kernel.h:10, from include/linux/list.h:9, from include/linux/module.h:12, from drivers/net/arcnet/com20020.c:31: drivers/net/arcnet/com20020.c: In function 'com20020_reset': >> include/linux/compiler.h:70:32: warning: 'inbyte' is used uninitialized in this function [-Wuninitialized] 70 | (__if_trace.miss_hit[1]++,1) : \ | ^ drivers/net/arcnet/com20020.c:286:9: note: 'inbyte' was declared here 286 | u_char inbyte; | ^~~~~~ vim +/inbyte +70 include/linux/compiler.h a15fd609ad53a6 Linus Torvalds 2019-03-20 59 a15fd609ad53a6 Linus Torvalds 2019-03-20 60 #define __trace_if_value(cond) ({ \ 2bcd521a684cc9 Steven Rostedt 2008-11-21 61 static struct ftrace_branch_data \ e04462fb82f8dd Miguel Ojeda 2018-09-03 62 __aligned(4) \ 33def8498fdde1 Joe Perches 2020-10-21 63 __section("_ftrace_branch") \ a15fd609ad53a6 Linus Torvalds 2019-03-20 64 __if_trace = { \ 2bcd521a684cc9 Steven Rostedt 2008-11-21 65 .func = __func__, \ 2bcd521a684cc9 Steven Rostedt 2008-11-21 66 .file = __FILE__, \ 2bcd521a684cc9 Steven Rostedt 2008-11-21 67 .line = __LINE__, \ 2bcd521a684cc9 Steven Rostedt 2008-11-21 68 }; \ a15fd609ad53a6 Linus Torvalds 2019-03-20 69 (cond) ? \ a15fd609ad53a6 Linus Torvalds 2019-03-20 @70 (__if_trace.miss_hit[1]++,1) : \ a15fd609ad53a6 Linus Torvalds 2019-03-20 71 (__if_trace.miss_hit[0]++,0); \ a15fd609ad53a6 Linus Torvalds 2019-03-20 72 }) a15fd609ad53a6 Linus Torvalds 2019-03-20 73 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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