reproduce:
        # https://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git/commit/?id=0a73106db83ac037945cb038c393ccdaa5225703
        git remote add namhyung-perf https://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git
        git fetch --no-tags namhyung-perf perf/hwmon-pmu
        git checkout 0a73106db83ac037945cb038c393ccdaa5225703
        make W=1 O=/tmp/kselftest headers
        make W=1 O=/tmp/kselftest -C tools/testing/selftests
        make W=1 O=/tmp/kselftest -C tools/testing/selftests/bpf