Greeting, FYI, we noticed the following commit (built with gcc-7): commit: 41862faccd8de068b39b8de522e459c4f1c457fc ("[PATCH] libbpf: Make bpf/bpf_helpers.h self-contained") url: https://github.com/0day-ci/linux/commits/Yoshiki-Komachi/libbpf-Make-bpf-... base: https://git.kernel.org/cgit/linux/kernel/git/bpf/bpf-next.git master in testcase: kernel-selftests with following parameters: group: kselftests-bpf ucode: 0xd6 test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel. test-url: https://www.kernel.org/doc/Documentation/kselftest.txt on test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with 16G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot <rong.a.chen(a)intel.com&gt; BPF runqslower.bpf.o In file included from runqslower.bpf.c:4: In file included from /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/tools/include/bpf/bpf_helpers.h:5: In file included from /usr/include/linux/types.h:9: /usr/include/linux/posix_types.h:27:3: error: typedef redefinition with different types ('struct __kernel_fd_set' vs 'struct __kernel_fd_set') } __kernel_fd_set; ^ /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/tools/include/vmlinux.h:45659:3: note: previous definition is here } __kernel_fd_set; ^ In file included from runqslower.bpf.c:4: In file included from /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/tools/include/bpf/bpf_helpers.h:5: In file included from /usr/include/linux/types.h:9: In file included from /usr/include/linux/posix_types.h:36: In file included from /usr/include/asm/posix_types.h:7: In file included from /usr/include/asm/posix_types_64.h:18: /usr/include/asm-generic/posix_types.h:68:22: error: typedef redefinition with different types ('unsigned int' vs '__kernel_ulong_t' (aka 'unsigned long')) typedef unsigned int __kernel_size_t; ^ /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/tools/include/vmlinux.h:55:26: note: previous definition is here typedef __kernel_ulong_t __kernel_size_t; ^ In file included from runqslower.bpf.c:4: In file included from /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/tools/include/bpf/bpf_helpers.h:5: In file included from /usr/include/linux/types.h:9: In file included from /usr/include/linux/posix_types.h:36: In file included from /usr/include/asm/posix_types.h:7: In file included from /usr/include/asm/posix_types_64.h:18: /usr/include/asm-generic/posix_types.h:69:14: error: typedef redefinition with different types ('int' vs '__kernel_long_t' (aka 'long')) typedef int __kernel_ssize_t; ^ /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/tools/include/vmlinux.h:57:25: note: previous definition is here typedef __kernel_long_t __kernel_ssize_t; ^ In file included from runqslower.bpf.c:4: In file included from /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/tools/include/bpf/bpf_helpers.h:5: In file included from /usr/include/linux/types.h:9: In file included from /usr/include/linux/posix_types.h:36: In file included from /usr/include/asm/posix_types.h:7: In file included from /usr/include/asm/posix_types_64.h:18: /usr/include/asm-generic/posix_types.h:70:14: error: typedef redefinition with different types ('int' vs '__kernel_long_t' (aka 'long')) typedef int __kernel_ptrdiff_t; ^ /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/tools/include/vmlinux.h:60597:25: note: previous definition is here typedef __kernel_long_t __kernel_ptrdiff_t; ^ In file included from runqslower.bpf.c:4: In file included from /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/tools/include/bpf/bpf_helpers.h:5: In file included from /usr/include/linux/types.h:9: In file included from /usr/include/linux/posix_types.h:36: In file included from /usr/include/asm/posix_types.h:7: In file included from /usr/include/asm/posix_types_64.h:18: /usr/include/asm-generic/posix_types.h:81:3: error: typedef redefinition with different types ('struct __kernel_fsid_t' vs 'struct __kernel_fsid_t') } __kernel_fsid_t; ^ /usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/tools/include/vmlinux.h:30449:3: note: previous definition is here } __kernel_fsid_t; ^ 5 errors generated. Makefile:56: recipe for target '/usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/tools//runqslower.bpf.o' failed make[1]: *** [/usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/tools//runqslower.bpf.o] Error 1 Makefile:142: recipe for target '/usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/runqslower' failed make: *** [/usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf/runqslower] Error 2 make: Leaving directory '/usr/src/perf_selftests-x86_64-rhel-7.6-kselftests-41862faccd8de068b39b8de522e459c4f1c457fc/tools/testing/selftests/bpf' To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Thanks, Rong Chen