reproduce (this is a W=1 build):
        # https://github.com/sean-jc/linux/commit/eb313cd2befb6b7fdcab08d5c7d41ad3cb8f3ec2
        git remote add sean-jc https://github.com/sean-jc/linux
        git fetch --no-tags sean-jc x86/unfudge_irq_bypass
        git checkout eb313cd2befb6b7fdcab08d5c7d41ad3cb8f3ec2
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/kvm/