reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux.git/commit/?id=1029c89bafc714c1b987f29e3bc124a7b63d28d5
        git remote add remoteproc https://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux.git
        git fetch --no-tags remoteproc rpmsg-next
        git checkout 1029c89bafc714c1b987f29e3bc124a7b63d28d5

        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=$HOME/0day COMPILER=gcc-16.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sh olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-16.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sh SHELL=/bin/bash samples/rpmsg/ sound/soc/codecs/