reproduce (this is a W=1 build):
        git remote add rcu https://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux.git
        git fetch rcu rcu/dev
        git checkout rcu/rcu/dev
        b4 shazam https://lore.kernel.org/r/20260910041427.3579817-1-kunwu.chan@gmail.com

        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=$HOME/0day COMPILER=gcc-16.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-16.1.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash kernel/rcu/