[kbuild-all] drivers/iio/adc/ti-tsc2046.c:242:62: warning: taking address of packed member 'data' of class or structure 'tsc2046_adc_atom' may result in an unaligned pointer value

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 0c947b893d69231a9add855939da7c66237ab44f commit: 9374e8f5a38defe90bc65b2decf317c1c62d91dd iio: adc: add ADC driver for the TI TSC2046 controller date: 8 months ago config: mips-randconfig-r002-20220116 (https://download.01.org/0day-ci/archive/20220117/202201171718.7ZCI4YeQ-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c63a3175c2947e8c1a2d3bbe16a8586600705c54) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 9374e8f5a38defe90bc65b2decf317c1c62d91dd # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/iio/adc/ drivers/usb/gadget/ 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 FIELD_GET(TI_TSC2046_DATA_12BIT, get_unaligned_be16(&buf->data)); ^~~~~~~~~ include/linux/bitfield.h:108:27: note: expanded from macro 'FIELD_GET' __BF_FIELD_CHECK(_mask, _reg, 0U, "FIELD_GET: "); \ ^~~~ include/linux/bitfield.h:52:38: note: expanded from macro '__BF_FIELD_CHECK' BUILD_BUG_ON_MSG((_mask) > (typeof(_reg))~0ull, \ ^~~~ include/linux/build_bug.h:39:58: note: expanded from macro 'BUILD_BUG_ON_MSG' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~ include/linux/compiler_types.h:328:22: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^~~~~~~~~ include/linux/compiler_types.h:316:23: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^~~~~~~~~ include/linux/compiler_types.h:308:9: note: expanded from macro '__compiletime_assert' if (!(condition)) \ ^~~~~~~~~ 1 warning generated. vim +242 drivers/iio/adc/ti-tsc2046.c 239 240 static u16 tsc2046_adc_get_value(struct tsc2046_adc_atom *buf) 241 { 243 } 244 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org