Hi Jianyong,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.10-rc3 next-20201111]
[cannot apply to tip/timers/core kvmarm/next kvm/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/Jianyong-Wu/Enable-ptp_kvm-for-arm-arm64/20201111-142600
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git eccc876724927ff3b9ff91f36f7b6b159e948f0c
config: arm-randconfig-r006-20201111 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
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://github.com/0day-ci/linux/commit/863f46b4f315744c8460d39c4e212737fecb4de9
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jianyong-Wu/Enable-ptp_kvm-for-arm-arm64/20201111-142600
        git checkout 863f46b4f315744c8460d39c4e212737fecb4de9
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

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

All errors (new ones prefixed by >>):

   arm-linux-gnueabi-ld: arch/arm/kernel/setup.o: in function `setup_arch':
>> arch/arm/kernel/setup.c:1148: undefined reference to `kvm_init_hyp_services'

vim +1148 arch/arm/kernel/setup.c

  1081	
  1082	void __init setup_arch(char **cmdline_p)
  1083	{
  1084		const struct machine_desc *mdesc;
  1085	
  1086		setup_processor();
  1087		mdesc = setup_machine_fdt(__atags_pointer);
  1088		if (!mdesc)
  1089			mdesc = setup_machine_tags(__atags_pointer, __machine_arch_type);
  1090		if (!mdesc) {
  1091			early_print("\nError: invalid dtb and unrecognized/unsupported machine ID\n");
  1092			early_print("  r1=0x%08x, r2=0x%08x\n", __machine_arch_type,
  1093				    __atags_pointer);
  1094			if (__atags_pointer)
  1095				early_print("  r2[]=%*ph\n", 16,
  1096					    phys_to_virt(__atags_pointer));
  1097			dump_machine_table();
  1098		}
  1099	
  1100		machine_desc = mdesc;
  1101		machine_name = mdesc->name;
  1102		dump_stack_set_arch_desc("%s", mdesc->name);
  1103	
  1104		if (mdesc->reboot_mode != REBOOT_HARD)
  1105			reboot_mode = mdesc->reboot_mode;
  1106	
  1107		init_mm.start_code = (unsigned long) _text;
  1108		init_mm.end_code   = (unsigned long) _etext;
  1109		init_mm.end_data   = (unsigned long) _edata;
  1110		init_mm.brk	   = (unsigned long) _end;
  1111	
  1112		/* populate cmd_line too for later use, preserving boot_command_line */
  1113		strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
  1114		*cmdline_p = cmd_line;
  1115	
  1116		early_fixmap_init();
  1117		early_ioremap_init();
  1118	
  1119		parse_early_param();
  1120	
  1121	#ifdef CONFIG_MMU
  1122		early_mm_init(mdesc);
  1123	#endif
  1124		setup_dma_zone(mdesc);
  1125		xen_early_init();
  1126		efi_init();
  1127		/*
  1128		 * Make sure the calculation for lowmem/highmem is set appropriately
  1129		 * before reserving/allocating any mmeory
  1130		 */
  1131		adjust_lowmem_bounds();
  1132		arm_memblock_init(mdesc);
  1133		/* Memory may have been removed so recalculate the bounds. */
  1134		adjust_lowmem_bounds();
  1135	
  1136		early_ioremap_reset();
  1137	
  1138		paging_init(mdesc);
  1139		request_standard_resources(mdesc);
  1140	
  1141		if (mdesc->restart)
  1142			arm_pm_restart = mdesc->restart;
  1143	
  1144		unflatten_device_tree();
  1145	
  1146		arm_dt_init_cpu_maps();
  1147		psci_dt_init();
> 1148		kvm_init_hyp_services();
  1149	#ifdef CONFIG_SMP
  1150		if (is_smp()) {
  1151			if (!mdesc->smp_init || !mdesc->smp_init()) {
  1152				if (psci_smp_available())
  1153					smp_set_ops(&psci_smp_ops);
  1154				else if (mdesc->smp)
  1155					smp_set_ops(mdesc->smp);
  1156			}
  1157			smp_init_cpus();
  1158			smp_build_mpidr_hash();
  1159		}
  1160	#endif
  1161	
  1162		if (!is_smp())
  1163			hyp_mode_check();
  1164	
  1165		reserve_crashkernel();
  1166	

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