Hi Haiwei, Thank you for the patch! Yet something to improve: [auto build test ERROR on kvm/linux-next] [also build test ERROR on linus/master v5.9-rc3 next-20200828] [cannot apply to linux/master vhost/linux-next] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Haiwei-Li/KVM-Check-the-allocation-of-pv-cpu-mask/20200901-195412 base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next config: x86_64-randconfig-a011-20200901 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c10e63677f5d20f18010f8f68c631ddc97546f7d) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> arch/x86/kernel/kvm.c:801:35: error: use of undeclared identifier 'kvm_send_ipi_mask_allbutself' apic->send_IPI_mask_allbutself = kvm_send_ipi_mask_allbutself; ^ 1 error generated. # https://github.com/0day-ci/linux/commit/13dd13ab0aefbb5c31bd8681831e6a11ac381509 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Haiwei-Li/KVM-Check-the-allocation-of-pv-cpu-mask/20200901-195412 git checkout 13dd13ab0aefbb5c31bd8681831e6a11ac381509 vim +/kvm_send_ipi_mask_allbutself +801 arch/x86/kernel/kvm.c 791 792 if (alloc) 793 for_each_possible_cpu(cpu) { 794 if (!zalloc_cpumask_var_node( 795 per_cpu_ptr(&__pv_cpu_mask, cpu), 796 GFP_KERNEL, cpu_to_node(cpu))) { 797 goto zalloc_cpumask_fail; 798 } 799 } 800 > 801 apic->send_IPI_mask_allbutself = kvm_send_ipi_mask_allbutself; 802 pv_ops.mmu.flush_tlb_others = kvm_flush_tlb_others; 803 return 0; 804 805 zalloc_cpumask_fail: 806 kvm_free_pv_cpu_mask(); 807 return -ENOMEM; 808 } 809 arch_initcall(kvm_alloc_cpumask); 810 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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