Hi songrui.771, kernel test robot noticed the following build warnings: [auto build test WARNING on bpf-next/master] [also build test WARNING on bpf/master linus/master v6.3-rc6 next-20230413] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/songrui-771/libbpf-correct-the-macro-KERNEL_VERSION-for-old-kernel/20230414-125238 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20230414045204.9748-1-songrui.771%40bytedance.com patch subject: [PATCH] libbpf: correct the macro KERNEL_VERSION for old kernel reproduce: make versioncheck If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202304141549.j09aWR6q-lkp@xxxxxxxxx/ versioncheck warnings: (new ones prefixed by >>) INFO PATH=/opt/cross/clang/bin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin /usr/bin/timeout -k 100 3h /usr/bin/make W=1 --keep-going HOSTCC=gcc-11 CC=gcc-11 -j32 ARCH=x86_64 versioncheck find ./* \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o \ -name '*.[hcS]' -type f -print | sort \ | xargs perl -w ./scripts/checkversion.pl ./drivers/accessibility/speakup/genmap.c: 13 linux/version.h not needed. ./drivers/accessibility/speakup/makemapdata.c: 13 linux/version.h not needed. ./drivers/soc/tegra/cbb/tegra-cbb.c: 19 linux/version.h not needed. ./drivers/soc/tegra/cbb/tegra194-cbb.c: 26 linux/version.h not needed. ./drivers/soc/tegra/cbb/tegra234-cbb.c: 27 linux/version.h not needed. ./drivers/staging/media/atomisp/include/linux/atomisp.h: 23 linux/version.h not needed. ./samples/trace_events/trace_custom_sched.c: 11 linux/version.h not needed. ./sound/soc/codecs/cs42l42.c: 14 linux/version.h not needed. ./tools/lib/bpf/bpf_helpers.h: 294: need linux/version.h >> ./tools/lib/bpf/libbpf_probes.c: 450: need linux/version.h ./tools/perf/tests/bpf-script-example.c: 60: need linux/version.h ./tools/perf/tests/bpf-script-test-kbuild.c: 21: need linux/version.h ./tools/perf/tests/bpf-script-test-prologue.c: 49: need linux/version.h ./tools/perf/tests/bpf-script-test-relocation.c: 51: need linux/version.h ./tools/testing/selftests/bpf/progs/dev_cgroup.c: 9 linux/version.h not needed. ./tools/testing/selftests/bpf/progs/netcnt_prog.c: 3 linux/version.h not needed. ./tools/testing/selftests/bpf/progs/test_map_lock.c: 4 linux/version.h not needed. ./tools/testing/selftests/bpf/progs/test_send_signal_kern.c: 4 linux/version.h not needed. ./tools/testing/selftests/bpf/progs/test_spin_lock.c: 4 linux/version.h not needed. ./tools/testing/selftests/bpf/progs/test_tcp_estats.c: 37 linux/version.h not needed. ./tools/testing/selftests/wireguard/qemu/init.c: 27 linux/version.h not needed. -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests