reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/joel.granados/linux.git/commit/?id=f01da46a76f68d2c13bb9d16e00324de5af560c8
        git remote add joel-granados https://git.kernel.org/pub/scm/linux/kernel/git/joel.granados/linux.git
        git fetch --no-tags joel-granados jag/sysctl_remset_net
        git checkout f01da46a76f68d2c13bb9d16e00324de5af560c8
        # 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 net/mpls/