reproduce:
        git checkout 4d911c7abee56771b0219a9fbf0120d06bdc9c14
        b4 shazam https://lore.kernel.org/r/20241204191349.1730936-11-jthoughton@google.com
        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