reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/9bde0bf765b3e68a8b71aba8090ba2e59388d9e5
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review UPDATE-20251218-003955/Kevin-Brodsky/powerpc-64s-Do-not-re-activate-batched-TLB-flush/20251215-230757
        git checkout 9bde0bf765b3e68a8b71aba8090ba2e59388d9e5

        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-15.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-15.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/mm/book3s64/