reproduce (this is a W=1 build):
        # https://github.com/gourryinverse/linux/commit/48a8ea8dcaa2781e2ab529cf440334d15dca5512
        git remote add gourryinverse https://github.com/gourryinverse/linux
        git fetch --no-tags gourryinverse private_compression
        git checkout 48a8ea8dcaa2781e2ab529cf440334d15dca5512

        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=$HOME/0day COMPILER=gcc-15.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sh olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-15.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sh SHELL=/bin/bash mm/