reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git/commit/?id=a57e27c43b0315ee86c6896510d69be5257e093e
        git remote add brgl https://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git
        git fetch --no-tags brgl gpio/for-next
        git checkout a57e27c43b0315ee86c6896510d69be5257e093e

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