reproduce (this is a W=1 build):
        git checkout 41bccc98fb7931d63d03f326a746ac4d429c1dd3
        b4 shazam https://lore.kernel.org/r/20240131-tracefs-kernfs-v1-1-f20e2e9a8d61@kernel.org
        # 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