[kbuild-all] [linux-stable-rc:linux-4.14.y 8908/9999] arch/arm/kvm/../../../virt/kvm/kvm_main.c:615:12: warning: no previous prototype for 'kvm_arch_post_init_vm'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.14.y head: e1f7d50ae3a3ec342e87a9b1ce6787bfb8b3c08b commit: 2d371f8836c5d633f9f495c9165eaf814643539d [8908/9999] kvm: x86: mmu: Recovery of shattered NX large pages config: arm-axm55xx_defconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 7.5.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc linux-4.14.y git checkout 2d371f8836c5d633f9f495c9165eaf814643539d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 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 >>): arch/arm/kvm/../../../virt/kvm/kvm_main.c:140:13: warning: no previous prototype for 'kvm_arch_mmu_notifier_invalidate_range' [-Wmissing-prototypes] __weak void kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ int __weak kvm_arch_post_init_vm(struct kvm *kvm) ^~~~~~~~~~~~~~~~~~~~~ void __weak kvm_arch_pre_destroy_vm(struct kvm *kvm) ^~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/kvm_host.h:14:0, from arch/arm/kvm/../../../virt/kvm/kvm_main.c:21: include/linux/signal.h: In function 'sigemptyset': include/linux/signal.h:178:22: warning: this statement may fall through [-Wimplicit-fallthrough=] case 2: set->sig[1] = 0; ~~~~~~~~~~~~^~~ include/linux/signal.h:179:2: note: here case 1: set->sig[0] = 0; ^~~~ vim +/kvm_arch_post_init_vm +615 arch/arm/kvm/../../../virt/kvm/kvm_main.c 610 611 /* 612 * Called after the VM is otherwise initialized, but just before adding it to 613 * the vm_list. 614 */ 616 { 617 return 0; 618 } 619 620 /* 621 * Called just after removing the VM from the vm_list, but before doing any 622 * other destruction. 623 */ 625 { 626 } 627 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org