Hi Hyunchul, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on cifs/for-next] [also build test WARNING on linux/master linus/master v5.13-rc2 next-20210521] [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/Hyunchul-Lee/cifs-decoding-negTo... base: git://git.samba.org/sfrench/cifs-2.6.git for-next config: i386-defconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/e1097df7e174530fece6a8afc49d61d34... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Hyunchul-Lee/cifs-decoding-negTokenInit-with-generic-ASN1-decoder/20210522-232614 git checkout e1097df7e174530fece6a8afc49d61d34b904869 # save the attached .config to linux build tree make W=1 ARCH=i386 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 >>): 11 | decode_negTokenInit(unsigned char *security_blob, int length, | ^~~~~~~~~~~~~~~~~~~ vim +/decode_negTokenInit +11 fs/cifs/asn1.c 9 10 int 12 struct TCP_Server_Info *server) 13 { 14 if (asn1_ber_decoder(&spnego_negtokeninit_decoder, server, 15 security_blob, length) == 0) 16 return 1; 17 else 18 return 0; 19 } 20 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org