tree: https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tmp.bpf/bpf_perf_enable head: 1ba795701061b272d73de6f55e43db6116c1cf36 commit: 1ba795701061b272d73de6f55e43db6116c1cf36 [1/1] WIP: bpf_perf_event_(dis,en)able config: x86_64-randconfig-r032-20210318 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project fcc1ce00931751ac02498986feb37744e9ace8de) 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/acme/linux.git/commit/?id... git remote add perf https://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git git fetch --no-tags perf tmp.bpf/bpf_perf_enable git checkout 1ba795701061b272d73de6f55e43db6116c1cf36 # 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 >>): static const struct bpf_func_proto bpf_perf_event_enable_proto = { ^ static const struct bpf_func_proto bpf_perf_event_disable_proto = { ^ 2 warnings generated. vim +/bpf_perf_event_enable_proto +1329 kernel/trace/bpf_trace.c 1328 1330 .func = bpf_perf_event_enable, 1331 .gpl_only = true, 1332 .ret_type = RET_INTEGER, 1333 .arg1_type = ARG_CONST_MAP_PTR, 1334 .arg2_type = ARG_ANYTHING, 1335 }; 1336 1337 BPF_CALL_2(bpf_perf_event_disable, struct bpf_map *, map, u64, flags) 1338 { 1339 return bpf_map__perf_event_set_state(map, flags, perf_event_disable); 1340 } 1341 1343 .func = bpf_perf_event_disable, 1344 .gpl_only = true, 1345 .ret_type = RET_INTEGER, 1346 .arg1_type = ARG_CONST_MAP_PTR, 1347 .arg2_type = ARG_ANYTHING, 1348 }; 1349 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org