reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/edf653aa3964af51ae2f2b180bcb0f6cfa26c8f7
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Vernon-Yang/psi-add-psi_group_flush_stats-function/20260509-210713
        git checkout edf653aa3964af51ae2f2b180bcb0f6cfa26c8f7
        # apt-get install llvm-dev

        # save the config file
        make W=1 ARCH=i386 olddefconfig
        make W=1 ARCH=i386 
        make W=1 headers_install
        make W=1 -C tools/testing/selftests