reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # https://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux.git/commit/?id=0bac6aced1c550ec9628e0fa5d98036c6cbc51b4
        git remote add ukleinek https://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux.git
        git fetch --no-tags ukleinek pwm/for-nexxt
        git checkout 0bac6aced1c550ec9628e0fa5d98036c6cbc51b4
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sh olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sh SHELL=/bin/bash drivers/pwm/