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/qcom/linux.git/commit/?id=84247db00a5c4f9b6fbf23cc46979508ddd8d855
        git remote add qcom https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux
        git fetch --no-tags qcom arm64-for-6.15
        git checkout 84247db00a5c4f9b6fbf23cc46979508ddd8d855
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash dtbs_check