reproduce (this is a W=1 build):
        # https://github.com/rgushchin/linux/commit/dca9f586d5471222d105b51cf2ceb5eb91fdda01
        git remote add rgushchin https://github.com/rgushchin/linux.git
        git fetch --no-tags rgushchin bpfoom.3.1
        git checkout dca9f586d5471222d105b51cf2ceb5eb91fdda01

        # 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 mm/