Hi Zhuang, Thank you for the patch! Yet something to improve: [auto build test ERROR on kvm/linux-next] [cannot apply to v5.4-rc2 next-20191011] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Zhuang-Yanying/KVM-fix-overflow-of-zero-page-refcount-with-ksm-running/20191012-020811 base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next config: x86_64-randconfig-s0-201940 (attached as .config) compiler: gcc-7 (Debian 7.4.0-13) 7.4.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): arch/x86/kvm/../../../virt/kvm/kvm_main.c: In function 'kvm_is_reserved_pfn': >> arch/x86/kvm/../../../virt/kvm/kvm_main.c:155:23: error: 'page' undeclared (first use in this function) return PageReserved(page) && !is_zero_pfn(pfn); ^~~~ arch/x86/kvm/../../../virt/kvm/kvm_main.c:155:23: note: each undeclared identifier is reported only once for each function it appears in vim +/page +155 arch/x86/kvm/../../../virt/kvm/kvm_main.c 151 152 bool kvm_is_reserved_pfn(kvm_pfn_t pfn) 153 { 154 if (pfn_valid(pfn)) > 155 return PageReserved(page) && !is_zero_pfn(pfn); 156 157 return true; 158 } 159 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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