Hi "Linus, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Linus-L-ssing/bridge-Implement-M... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git bfdd5aaa54b0a44d9df550fe4c9db7e1470a11b8 config: x86_64-randconfig-s022-20200817 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-180-g49f7e13a-dirty # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' 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 >>): 2287 | int br_multicast_set_wakeupcall(struct net_bridge_port *p, unsigned long val) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ # https://github.com/0day-ci/linux/commit/fdde3c8b901df4c7d62fcd4cdd9a66114... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Linus-L-ssing/bridge-Implement-MLD-Querier-wake-up-calls-Android-bug-workaround/20200817-043402 git checkout fdde3c8b901df4c7d62fcd4cdd9a66114758889a vim +/br_multicast_set_wakeupcall +2287 net/bridge/br_multicast.c 2286 2288 { 2289 if (val > U8_MAX) 2290 return -EINVAL; 2291 2292 p->wakeupcall_num_rings = val; 2293 return 0; 2294 } 2295 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org