tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.19.y head: d694d4388e889e15298d8de938fb4e61e4df75bf commit: 46a4a014c48e64e28970ca775bb7adf4778821af [4612/9999] kvm: x86: mmu: Recovery of shattered NX large pages config: arm-axm55xx_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 46a4a014c48e64e28970ca775bb7adf4778821af # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): 632 | int __weak kvm_arch_post_init_vm(struct kvm *kvm) | ^~~~~~~~~~~~~~~~~~~~~ 641 | void __weak kvm_arch_pre_destroy_vm(struct kvm *kvm) | ^~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/kvm_host.h:14, from arch/arm/kvm/../../../virt/kvm/kvm_main.c:21: include/linux/signal.h: In function 'sigemptyset': include/linux/signal.h:180:22: warning: this statement may fall through [-Wimplicit-fallthrough=] 180 | case 2: set->sig[1] = 0; | ~~~~~~~~~~~~^~~ include/linux/signal.h:181:2: note: here 181 | case 1: set->sig[0] = 0; | ^~~~ vim +/kvm_arch_post_init_vm +632 arch/arm/kvm/../../../virt/kvm/kvm_main.c 627 628 /* 629 * Called after the VM is otherwise initialized, but just before adding it to 630 * the vm_list. 631 */ 633 { 634 return 0; 635 } 636 637 /* 638 * Called just after removing the VM from the vm_list, but before doing any 639 * other destruction. 640 */ 642 { 643 } 644 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org