tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git char-misc-testing head: 63879e2964bceee2aa5bbe8b99ea58bba28bb64f commit: fd307a4ad332ef50be5569c92490219e7cd84ce5 [98/99] nvmem: prepare basics for FRAM support config: arm64-randconfig-r023-20210611 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d2012d965d60c3258b3a69d024491698f8aec386) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git/comm... git remote add char-misc https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git git fetch --no-tags char-misc char-misc-testing git checkout fd307a4ad332ef50be5569c92490219e7cd84ce5 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): return sysfs_emit(buf, "%*ph\n", sizeof(at25->sernum), at25->sernum); ~~^ ~~~~~~~~~~~~~~~~~~~~ is_fram = (int)match->data; ^~~~~~~~~~~~~~~~ 2 warnings generated. vim +181 drivers/misc/eeprom/at25.c 175 176 static ssize_t sernum_show(struct device *dev, struct device_attribute *attr, char *buf) 177 { 178 struct at25_data *at25; 179 180 at25 = dev_get_drvdata(dev); 182 } 183 static DEVICE_ATTR_RO(sernum); 184 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org