[kbuild-all] [linux-next:master 6311/8137] arch/riscv/mm/init.c:520:13: warning: no previous prototype for 'resource_init'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: ca0e494af5edb59002665bf12871e94b4163a257 commit: 526fbaed33e8eac89634a676e5f8e3b41dfae66e [6311/8137] riscv: Register System RAM as iomem resources config: riscv-randconfig-r014-20200715 (attached as .config) compiler: riscv32-linux-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 git checkout 526fbaed33e8eac89634a676e5f8e3b41dfae66e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 520 | void __init resource_init(void) | ^~~~~~~~~~~~~ vim +/resource_init +520 arch/riscv/mm/init.c 519 521 { 522 struct memblock_region *region; 523 524 for_each_memblock(memory, region) { 525 struct resource *res; 526 527 res = memblock_alloc(sizeof(struct resource), SMP_CACHE_BYTES); 528 if (!res) 529 panic("%s: Failed to allocate %zu bytes\n", __func__, 530 sizeof(struct resource)); 531 532 if (memblock_is_nomap(region)) { 533 res->name = "reserved"; 534 res->flags = IORESOURCE_MEM; 535 } else { 536 res->name = "System RAM"; 537 res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY; 538 } 539 res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region)); 540 res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1; 541 542 request_resource(&iomem_resource, res); 543 } 544 } 545 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org