reproduce (this is a W=1 build):
        git checkout b80cc4df1124702c600fd43b784e423a30919204
        b4 shazam https://lore.kernel.org/r/20240719-fsconfig-fsparam_fd-fixes-v1-2-7ccd315c2ad4@cyphar.com
        # 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 fs/coda/