Hi Cong, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on net-next/master] url: https://github.com/0day-ci/linux/commits/Cong-Wang/net_sched-introduce-eB... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 13bb8429ca985497bfba3a4afa6cd470d15fed10 config: riscv-buildonly-randconfig-r003-20210913 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 261cbe98c38f8c1ee1a482fe76511110e790f58a) 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/11b7d639a3edc1182a3027ae62cc35dcf... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Cong-Wang/net_sched-introduce-eBPF-based-Qdisc/20210914-072015 git checkout 11b7d639a3edc1182a3027ae62cc35dcf0924178 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): 0, /* avoid empty array */ ^ include/linux/bpf_types.h:11:1: note: previous initialization is here BPF_PROG_TYPE(BPF_PROG_TYPE_SCHED_QDISC, tc_cls_act, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/btf.c:4419:10: note: expanded from macro 'BPF_PROG_TYPE' [_id] = __ctx_convert##_id, ^~~~~~~~~~~~~~~~~~ <scratch space>:151:1: note: expanded from here __ctx_convertBPF_PROG_TYPE_SCHED_QDISC ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 error generated. vim +4422 kernel/bpf/btf.c 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4396 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4397 #define BPF_MAP_TYPE(_id, _ops) f2e10bff16a0fd Andrii Nakryiko 2020-04-28 4398 #define BPF_LINK_TYPE(_id, _name) 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4399 static union { 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4400 struct bpf_ctx_convert { 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4401 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4402 prog_ctx_type _id##_prog; \ 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4403 kern_ctx_type _id##_kern; 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4404 #include <linux/bpf_types.h> 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4405 #undef BPF_PROG_TYPE 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4406 } *__t; 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4407 /* 't' is written once under lock. Read many times. */ 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4408 const struct btf_type *t; 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4409 } bpf_ctx_convert; 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4410 enum { 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4411 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4412 __ctx_convert##_id, 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4413 #include <linux/bpf_types.h> 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4414 #undef BPF_PROG_TYPE ce27709b8162e5 Alexei Starovoitov 2019-11-27 4415 __ctx_convert_unused, /* to avoid empty enum in extreme .config */ 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4416 }; 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4417 static u8 bpf_ctx_convert_map[] = { 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4418 #define BPF_PROG_TYPE(_id, _name, prog_ctx_type, kern_ctx_type) \ 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4419 [_id] = __ctx_convert##_id, 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4420 #include <linux/bpf_types.h> 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4421 #undef BPF_PROG_TYPE 4c80c7bc583a87 Arnd Bergmann 2019-12-10 @4422 0, /* avoid empty array */ 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4423 }; 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4424 #undef BPF_MAP_TYPE f2e10bff16a0fd Andrii Nakryiko 2020-04-28 4425 #undef BPF_LINK_TYPE 91cc1a99740e2e Alexei Starovoitov 2019-11-14 4426 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org