reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/36ba973f7fdc2baf760334dffccba25c685c8e89
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jisheng-Zhang/dt-bindings-serial-snps-dw-apb-uart-Add-Synaptics-sl261x-uart/20260929-141358
        git checkout 36ba973f7fdc2baf760334dffccba25c685c8e89

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