Re: [PATCH v2] mm: hugetlb: optionally allocate gigantic hugepages using cma

[kbuild test robot <lkp@intel.com>]

[-- Attachment #1: Type: text/plain, Size: 5179 bytes --]

Hi Roman,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.6-rc5 next-20200306]
[cannot apply to mmotm/master tip/x86/core linux/master]
[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/Roman-Gushchin/mm-hugetlb-optionally-allocate-gigantic-hugepages-using-cma/20200310-082721
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 30bb5572ce7a8710fa9ea720b6ecb382791c9800
config: x86_64-randconfig-s2-20200310 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.2-10+deb8u1) 4.9.2
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@intel.com>

All errors (new ones prefixed by >>):

   arch/x86/kernel/setup.c: In function 'setup_arch':
>> arch/x86/kernel/setup.c:1162:2: error: implicit declaration of function 'hugetlb_cma_reserve' [-Werror=implicit-function-declaration]
     hugetlb_cma_reserve();
     ^
   cc1: some warnings being treated as errors

vim +/hugetlb_cma_reserve +1162 arch/x86/kernel/setup.c

  1094	
  1095		reserve_real_mode();
  1096	
  1097		trim_platform_memory_ranges();
  1098		trim_low_memory_range();
  1099	
  1100		init_mem_mapping();
  1101	
  1102		idt_setup_early_pf();
  1103	
  1104		/*
  1105		 * Update mmu_cr4_features (and, indirectly, trampoline_cr4_features)
  1106		 * with the current CR4 value.  This may not be necessary, but
  1107		 * auditing all the early-boot CR4 manipulation would be needed to
  1108		 * rule it out.
  1109		 *
  1110		 * Mask off features that don't work outside long mode (just
  1111		 * PCIDE for now).
  1112		 */
  1113		mmu_cr4_features = __read_cr4() & ~X86_CR4_PCIDE;
  1114	
  1115		memblock_set_current_limit(get_max_mapped());
  1116	
  1117		/*
  1118		 * NOTE: On x86-32, only from this point on, fixmaps are ready for use.
  1119		 */
  1120	
  1121	#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
  1122		if (init_ohci1394_dma_early)
  1123			init_ohci1394_dma_on_all_controllers();
  1124	#endif
  1125		/* Allocate bigger log buffer */
  1126		setup_log_buf(1);
  1127	
  1128		if (efi_enabled(EFI_BOOT)) {
  1129			switch (boot_params.secure_boot) {
  1130			case efi_secureboot_mode_disabled:
  1131				pr_info("Secure boot disabled\n");
  1132				break;
  1133			case efi_secureboot_mode_enabled:
  1134				pr_info("Secure boot enabled\n");
  1135				break;
  1136			default:
  1137				pr_info("Secure boot could not be determined\n");
  1138				break;
  1139			}
  1140		}
  1141	
  1142		reserve_initrd();
  1143	
  1144		acpi_table_upgrade();
  1145	
  1146		vsmp_init();
  1147	
  1148		io_delay_init();
  1149	
  1150		early_platform_quirks();
  1151	
  1152		/*
  1153		 * Parse the ACPI tables for possible boot-time SMP configuration.
  1154		 */
  1155		acpi_boot_table_init();
  1156	
  1157		early_acpi_boot_init();
  1158	
  1159		initmem_init();
  1160		dma_contiguous_reserve(max_pfn_mapped << PAGE_SHIFT);
  1161	
> 1162		hugetlb_cma_reserve();
  1163	
  1164		/*
  1165		 * Reserve memory for crash kernel after SRAT is parsed so that it
  1166		 * won't consume hotpluggable memory.
  1167		 */
  1168		reserve_crashkernel();
  1169	
  1170		memblock_find_dma_reserve();
  1171	
  1172		if (!early_xdbc_setup_hardware())
  1173			early_xdbc_register_console();
  1174	
  1175		x86_init.paging.pagetable_init();
  1176	
  1177		kasan_init();
  1178	
  1179		/*
  1180		 * Sync back kernel address range.
  1181		 *
  1182		 * FIXME: Can the later sync in setup_cpu_entry_areas() replace
  1183		 * this call?
  1184		 */
  1185		sync_initial_page_table();
  1186	
  1187		tboot_probe();
  1188	
  1189		map_vsyscall();
  1190	
  1191		generic_apic_probe();
  1192	
  1193		early_quirks();
  1194	
  1195		/*
  1196		 * Read APIC and some other early information from ACPI tables.
  1197		 */
  1198		acpi_boot_init();
  1199		sfi_init();
  1200		x86_dtb_init();
  1201	
  1202		/*
  1203		 * get boot-time SMP configuration:
  1204		 */
  1205		get_smp_config();
  1206	
  1207		/*
  1208		 * Systems w/o ACPI and mptables might not have it mapped the local
  1209		 * APIC yet, but prefill_possible_map() might need to access it.
  1210		 */
  1211		init_apic_mappings();
  1212	
  1213		prefill_possible_map();
  1214	
  1215		init_cpu_to_node();
  1216	
  1217		io_apic_init_mappings();
  1218	
  1219		x86_init.hyper.guest_late_init();
  1220	
  1221		e820__reserve_resources();
  1222		e820__register_nosave_regions(max_pfn);
  1223	
  1224		x86_init.resources.reserve_resources();
  1225	
  1226		e820__setup_pci_gap();
  1227	

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

[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 36810 bytes --]