tree:   https://github.com/intel/tdx.git kvm
head:   a9119ab747d6880e39258627c6b6c693b803f794
commit: 8d0d0fd6a6dd39c141774d6b787bfdeeb00c58e3 [13/94] KVM: TDX: define and export helper functions for KVM TDX support
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel/tdx/commit/8d0d0fd6a6dd39c141774d6b787bfdeeb00c58e3
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx kvm
        git checkout 8d0d0fd6a6dd39c141774d6b787bfdeeb00c58e3
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> arch/x86/kvm/boot/seam/tdx_common.c:74:12: warning: no previous prototype for 'init_package_masters' [-Wmissing-prototypes]
      74 | int __init init_package_masters(void)
         |            ^~~~~~~~~~~~~~~~~~~~


vim +/init_package_masters +74 arch/x86/kvm/boot/seam/tdx_common.c

    69	
    70	/*
    71	 * Setup one-cpu-per-pkg array to do package-scoped SEAMCALLs. The array is
    72	 * only necessary if there are multiple packages.
    73	 */
  > 74	int __init init_package_masters(void)
    75	{
    76		int cpu, pkg, nr_filled, nr_pkgs;
    77	
    78		nr_pkgs = topology_max_packages();
    79		if (nr_pkgs == 1)
    80			return 0;
    81	
    82		tdx_package_masters = kcalloc(nr_pkgs, sizeof(int), GFP_KERNEL);
    83		if (!tdx_package_masters)
    84			return -ENOMEM;
    85	
    86		memset(tdx_package_masters, -1, nr_pkgs * sizeof(int));
    87	
    88		nr_filled = 0;
    89		for_each_online_cpu(cpu) {
    90			pkg = topology_physical_package_id(cpu);
    91			if (tdx_package_masters[pkg] >= 0)
    92				continue;
    93	
    94			tdx_package_masters[pkg] = cpu;
    95			if (++nr_filled == topology_max_packages())
    96				break;
    97		}
    98	
    99		if (WARN_ON(nr_filled != topology_max_packages())) {
   100			kfree(tdx_package_masters);
   101			return -EIO;
   102		}
   103	
   104		if (cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN, "tdx/cpu:starting",
   105					      tdx_starting_cpu, tdx_dying_cpu) < 0) {
   106			kfree(tdx_package_masters);
   107			return -EIO;
   108		}
   109	
   110		return 0;
   111	}
   112	

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