Hi Peter, It's probably a bug fix that unveils the link errors. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 08bf1a27c4c354b853fd81a79e953525bbcc8506 commit: 7a7a8f549ddd18126dfa3dedbe42d877614c7995 arm/patch: Fix !MMU compile date: 4 months ago :::::: branch date: 2 hours ago :::::: commit date: 4 months ago config: arm-randconfig-r023-20200614 (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 git checkout 7a7a8f549ddd18126dfa3dedbe42d877614c7995 # 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(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): arm-linux-gnueabi-ld: arch/arm/mach-dove/pcie.o: in function `dove_pcie_setup': # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git remote update linus git checkout 7a7a8f549ddd18126dfa3dedbe42d877614c7995 vim +59 arch/arm/mach-dove/pcie.c edabd38e1a017e Saeed Bishara 2009-08-06 36 edabd38e1a017e Saeed Bishara 2009-08-06 37 edabd38e1a017e Saeed Bishara 2009-08-06 38 static int __init dove_pcie_setup(int nr, struct pci_sys_data *sys) edabd38e1a017e Saeed Bishara 2009-08-06 39 { edabd38e1a017e Saeed Bishara 2009-08-06 40 struct pcie_port *pp; edabd38e1a017e Saeed Bishara 2009-08-06 41 edabd38e1a017e Saeed Bishara 2009-08-06 42 if (nr >= num_pcie_ports) edabd38e1a017e Saeed Bishara 2009-08-06 43 return 0; edabd38e1a017e Saeed Bishara 2009-08-06 44 edabd38e1a017e Saeed Bishara 2009-08-06 45 pp = &pcie_port[nr]; 43ba990bb7bf74 Russell King 2012-03-10 46 sys->private_data = pp; edabd38e1a017e Saeed Bishara 2009-08-06 47 pp->root_bus_nr = sys->busnr; edabd38e1a017e Saeed Bishara 2009-08-06 48 edabd38e1a017e Saeed Bishara 2009-08-06 49 /* edabd38e1a017e Saeed Bishara 2009-08-06 50 * Generic PCIe unit setup. edabd38e1a017e Saeed Bishara 2009-08-06 51 */ edabd38e1a017e Saeed Bishara 2009-08-06 52 orion_pcie_set_local_bus_nr(pp->base, sys->busnr); edabd38e1a017e Saeed Bishara 2009-08-06 53 63a9332b232bda Andrew Lunn 2011-12-07 54 orion_pcie_setup(pp->base); edabd38e1a017e Saeed Bishara 2009-08-06 55 d191bb6961ab5f Rob Herring 2012-02-28 56 if (pp->index == 0) d191bb6961ab5f Rob Herring 2012-02-28 57 pci_ioremap_io(sys->busnr * SZ_64K, DOVE_PCIE0_IO_PHYS_BASE); d191bb6961ab5f Rob Herring 2012-02-28 58 else d191bb6961ab5f Rob Herring 2012-02-28 @59 pci_ioremap_io(sys->busnr * SZ_64K, DOVE_PCIE1_IO_PHYS_BASE); edabd38e1a017e Saeed Bishara 2009-08-06 60 edabd38e1a017e Saeed Bishara 2009-08-06 61 /* edabd38e1a017e Saeed Bishara 2009-08-06 62 * IORESOURCE_MEM edabd38e1a017e Saeed Bishara 2009-08-06 63 */ edabd38e1a017e Saeed Bishara 2009-08-06 64 snprintf(pp->mem_space_name, sizeof(pp->mem_space_name), edabd38e1a017e Saeed Bishara 2009-08-06 65 "PCIe %d MEM", pp->index); edabd38e1a017e Saeed Bishara 2009-08-06 66 pp->mem_space_name[sizeof(pp->mem_space_name) - 1] = 0; d191bb6961ab5f Rob Herring 2012-02-28 67 pp->res.name = pp->mem_space_name; edabd38e1a017e Saeed Bishara 2009-08-06 68 if (pp->index == 0) { d191bb6961ab5f Rob Herring 2012-02-28 69 pp->res.start = DOVE_PCIE0_MEM_PHYS_BASE; d191bb6961ab5f Rob Herring 2012-02-28 70 pp->res.end = pp->res.start + DOVE_PCIE0_MEM_SIZE - 1; edabd38e1a017e Saeed Bishara 2009-08-06 71 } else { d191bb6961ab5f Rob Herring 2012-02-28 72 pp->res.start = DOVE_PCIE1_MEM_PHYS_BASE; d191bb6961ab5f Rob Herring 2012-02-28 73 pp->res.end = pp->res.start + DOVE_PCIE1_MEM_SIZE - 1; edabd38e1a017e Saeed Bishara 2009-08-06 74 } d191bb6961ab5f Rob Herring 2012-02-28 75 pp->res.flags = IORESOURCE_MEM; d191bb6961ab5f Rob Herring 2012-02-28 76 if (request_resource(&iomem_resource, &pp->res)) edabd38e1a017e Saeed Bishara 2009-08-06 77 panic("Request PCIe Memory resource failed\n"); d191bb6961ab5f Rob Herring 2012-02-28 78 pci_add_resource_offset(&sys->resources, &pp->res, sys->mem_offset); edabd38e1a017e Saeed Bishara 2009-08-06 79 edabd38e1a017e Saeed Bishara 2009-08-06 80 return 1; edabd38e1a017e Saeed Bishara 2009-08-06 81 } edabd38e1a017e Saeed Bishara 2009-08-06 82 :::::: The code at line 59 was first introduced by commit :::::: d191bb6961ab5f8de9b20b9540b81f352f5dd765 ARM: dove: use fixed PCI i/o mapping :::::: TO: Rob Herring <rob.herring(a)calxeda.com&gt; :::::: CC: Rob Herring <rob.herring(a)calxeda.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org _______________________________________________ kbuild mailing list -- kbuild(a)lists.01.org To unsubscribe send an email to kbuild-leave(a)lists.01.org