reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/3e7984a76e1b74111e982852c01663e6f6f6dabe
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Oleg-Nesterov/sysctl-remove-CONFIG_PROC_SYSCTL-it-just-mirrors-CONFIG_SYSCTL/20260727-231232
        git checkout 3e7984a76e1b74111e982852c01663e6f6f6dabe

        # 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 kernel/