tree: https://git.kernel.org/pub/scm/linux/kernel/git/rw/misc.git muse_v1 head: d1901f3da6f0b1e1448f26c782f8da52150bc187 commit: 0a26500839bb81a7adae5902b3c339ff9d6aa0ca [3/5] fuse: Make cuse_parse_one a common helper config: x86_64-randconfig-a005-20201119 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project b2613fb2f0f53691dd0211895afbb9413457fca7) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/rw/misc.git/commit/?id=0a... git remote add rw https://git.kernel.org/pub/scm/linux/kernel/git/rw/misc.git git fetch --no-tags rw muse_v1 git checkout 0a26500839bb81a7adae5902b3c339ff9d6aa0ca # 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: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): int fuse_kv_parse_one(char **pp, char *end, char **keyp, char **valp) ^ fs/fuse/helper.c:29:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int fuse_kv_parse_one(char **pp, char *end, char **keyp, char **valp) ^ static 1 warning generated. vim +/fuse_kv_parse_one +29 fs/fuse/helper.c 12 13 /** 14 * fuse_kv_parse_one - parse one key=value pair 15 * @pp: i/o parameter for the current position 16 * @end: points to one past the end of the packed string 17 * @keyp: out parameter for key 18 * @valp: out parameter for value 19 * 20 * *@pp points to packed strings - "key0=val0\0key1=val1\0" which ends 21 * at @end - 1. This function parses one pair and set *@keyp to the 22 * start of the key and *@valp to the start of the value. Note that 23 * the original string is modified such that the key string is 24 * terminated with '\0'. *@pp is updated to point to the next string. 25 * 26 * RETURNS: 27 * 1 on successful parse, 0 on EOF, -errno on failure. 28 */ --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org