[linux-next:master 3231/3956] arch/x86/xen/smp_hvm.c:77:3: error: use of undeclared identifier 'nopvspin'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   b3a3cbdec55b090d22a09f75efb7c7d34cb97f25
commit: 3d7746bea92530e8695258a3cf3ddec7a135edd6 [3231/3956] x86/xen: Fix xen_hvm_smp_init() when vector callback not available
config: x86_64-randconfig-r021-20210115 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5b42fd8dd4e7e29125a09a41a33af7c9cb57d144)
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=3d7746bea92530e8695258a3cf3ddec7a135edd6
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 3d7746bea92530e8695258a3cf3ddec7a135edd6
        # 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 <redacted>

All errors (new ones prefixed by >>):

quoted

arch/x86/xen/smp_hvm.c:77:3: error: use of undeclared identifier 'nopvspin'

                   nopvspin = true;
                   ^
   1 error generated.


vim +/nopvspin +77 arch/x86/xen/smp_hvm.c

    68	
    69	void __init xen_hvm_smp_init(void)
    70	{
    71		smp_ops.smp_prepare_boot_cpu = xen_hvm_smp_prepare_boot_cpu;
    72		smp_ops.smp_prepare_cpus = xen_hvm_smp_prepare_cpus;
    73		smp_ops.smp_cpus_done = xen_smp_cpus_done;
    74		smp_ops.cpu_die = xen_hvm_cpu_die;
    75	
    76		if (!xen_have_vector_callback) {
  > 77			nopvspin = true;

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org