reproduce (this is a W=1 build): # https://github.com/sean-jc/linux/commit/08d9dcfffc5235154aa5ac85956aa72f18acea0b git remote add sean-jc https://github.com/sean-jc/linux git fetch --no-tags sean-jc x86/msr_uaccess_cleanup git checkout 08d9dcfffc5235154aa5ac85956aa72f18acea0b # 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/