Hi Vadym, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on linux/master v5.7-rc7 next-20200529] [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/Vadym-Kochan/nvmem-add-ONIE-NVMEM-cells-provider/20200528-041903 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git b0c3ba31be3e45a130e13b278cf3b90f69bda6f6 config: x86_64-randconfig-r024-20200529 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 2d068e534f1671459e1b135852c1b3c10502e929) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot All warnings (new ones prefixed by >>, old ones prefixed by <<): >> drivers/nvmem/onie-cells.c:56:57: warning: size argument in 'memcmp' call is a comparison [-Wmemsize-comparison] if (memcmp(hdr->id, ONIE_NVMEM_HDR_ID, sizeof(hdr->id) != 0)) ~~~~~~~~~~~~~~~~^~~~ drivers/nvmem/onie-cells.c:56:6: note: did you mean to compare the result of 'memcmp' instead? if (memcmp(hdr->id, ONIE_NVMEM_HDR_ID, sizeof(hdr->id) != 0)) ^ ~ ) drivers/nvmem/onie-cells.c:56:41: note: explicitly cast the argument to size_t to silence this warning if (memcmp(hdr->id, ONIE_NVMEM_HDR_ID, sizeof(hdr->id) != 0)) ^ (size_t)( ) 1 warning generated. vim +/memcmp +56 drivers/nvmem/onie-cells.c 53 54 static bool onie_nvmem_hdr_is_valid(struct onie_nvmem_hdr *hdr) 55 { > 56 if (memcmp(hdr->id, ONIE_NVMEM_HDR_ID, sizeof(hdr->id) != 0)) 57 return false; 58 if (hdr->version != 0x1) 59 return false; 60 61 return true; 62 } 63 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org