Hi Kumar, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.16-rc1 next-20211115] [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/Kumar-Thangavel/Add-payload-to-b... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git cb690f5238d71f543f4ce874aa59237cf53a877c config: riscv-buildonly-randconfig-r006-20211115 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project fbe72e41b99dc7994daac300d208a955be3e4a0a) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/0day-ci/linux/commit/263eaf647698f405f4f9905c947bf73b8... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Kumar-Thangavel/Add-payload-to-be-32-bit-aligned-to-fix-dropped-packets/20211110-175537 git checkout 263eaf647698f405f4f9905c947bf73b87c55b79 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang 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 warnings (new ones prefixed by >>): len += max(payload, 26); ^~~~~~~~~~~~~~~~ include/linux/minmax.h:52:19: note: expanded from macro 'max' #define max(x, y) __careful_cmp(x, y, >) ^~~~~~~~~~~~~~~~~~~~~~ include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp' __builtin_choose_expr(__safe_cmp(x, y), \ ^~~~~~~~~~~~~~~~ include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp' (__typecheck(x, y) && __no_side_effects(x, y)) ^~~~~~~~~~~~~~~~~ include/linux/minmax.h:20:28: note: expanded from macro '__typecheck' (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1))) ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~ 1 warning generated. vim +225 net/ncsi/ncsi-cmd.c 210 211 static int ncsi_cmd_handler_oem(struct sk_buff *skb, 212 struct ncsi_cmd_arg *nca) 213 { 214 struct ncsi_cmd_oem_pkt *cmd; 215 unsigned int len; 216 /* NC-SI spec DSP_0222_1.2.0, section 8.2.2.2 217 * requires payload to be padded with 0 to 218 * 32-bit boundary before the checksum field. 219 * Ensure the padding bytes are accounted for in 220 * skb allocation 221 */ 222 223 unsigned short payload = ALIGN(nca->payload, 4); 224 len = sizeof(struct ncsi_cmd_pkt_hdr) + 4; 226 227 cmd = skb_put_zero(skb, len); 228 memcpy(&cmd->mfr_id, nca->data, nca->payload); 229 ncsi_cmd_build_header(&cmd->cmd.common, nca); 230 231 return 0; 232 } 233 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org