BTF_UNION_ENC 6493 tools/testing/selftests/bpf/test_btf.c BTF_UNION_ENC(NAME_TBD, 1, 4), /* [6] union */ BTF_UNION_ENC 6518 tools/testing/selftests/bpf/test_btf.c BTF_UNION_ENC(NAME_TBD, 1, 4), /* [6] union */