reproduce (this is a W=1 build): git clone https://github.com/intel/lkp-tests.git ~/lkp-tests # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/jic23/cxl-staging.git/commit/?id=67c8bdd7ebb95e48944e4ebffe0a6ce6b68d1663 git remote add jic23-cxl-staging https://git.kernel.org/pub/scm/linux/kernel/git/jic23/cxl-staging.git git fetch --no-tags jic23-cxl-staging arm-numa-fixes git checkout 67c8bdd7ebb95e48944e4ebffe0a6ce6b68d1663 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-19 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/mm/