reproduce (this is a W=1 build): # https://github.com/weiny2/linux-kernel/commit/2b9557834645e8bef6b602691c392c898d45afa2 git remote add weiny2 https://github.com/weiny2/linux-kernel.git git fetch --no-tags weiny2 cxl-cper-testing git checkout 2b9557834645e8bef6b602691c392c898d45afa2 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 olddefconfig make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash