Hi Paolo, It's probably a bug fix that unveils the link errors.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 72cf0b07418a9c8349aa9137194b1ccba6e54a9d commit: c011d23ba046826ccf8c4a4a6c1d01c9ccaa1403 kvm: fix compilation on aarch64 date: 28 hours ago config: s390-alldefconfig (attached as .config) compiler: s390x-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout c011d23ba046826ccf8c4a4a6c1d01c9ccaa1403 # save the attached .config to linux build tree GCC_VERSION=7.2.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <l...@intel.com> All errors (new ones prefixed by >>): s390x-linux-gnu-ld: arch/s390/../../virt/kvm/kvm_main.o: in function `kvm_vcpu_map': >> kvm_main.c:(.text+0x3e3a): undefined reference to `memremap' s390x-linux-gnu-ld: arch/s390/../../virt/kvm/kvm_main.o: in function `kvm_vcpu_unmap': >> kvm_main.c:(.text+0x48be): undefined reference to `memunmap' --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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