reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/8f338749e31040507021787cb15ad0a8edfa15f5
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jann-Horn/futex-Fix-mm-reuse-handling-for-FUT_OFF_MMSHARED/20260929-183132
        git checkout 8f338749e31040507021787cb15ad0a8edfa15f5

        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=$HOME/0day COMPILER=gcc-10.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash