reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git/commit/?id=02e4d9a4f08ff51fd302c0acda54c176d6912178
        git remote add vbabka https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git
        git fetch --no-tags vbabka maple-tree-sheaves-v3-hack
        git checkout 02e4d9a4f08ff51fd302c0acda54c176d6912178
        # 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 lib/