tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: b74523885a715463203d4ccc3cf8c85952d3701a commit: 6e5a1fff9096ecd259dedcbbdc812aa90986a40e [2520/14231] PCI: Avoid building empty drivers config: mips-randconfig-s031-20210421 (attached as .config) compiler: mips64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 6e5a1fff9096ecd259dedcbbdc812aa90986a40e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) command-line: note: in included file: builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQUIRE redefined builtin:0:0: sparse: this was the original definition builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_SEQ_CST redefined builtin:0:0: sparse: this was the original definition builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQ_REL redefined builtin:0:0: sparse: this was the original definition builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_RELEASE redefined builtin:0:0: sparse: this was the original definition drivers/pci/controller/pci-xgene.c:510:26: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void *bar_addr @@ got void [noderef] __iomem * @@ drivers/pci/controller/pci-xgene.c:510:26: sparse: expected void *bar_addr drivers/pci/controller/pci-xgene.c:510:26: sparse: got void [noderef] __iomem * drivers/pci/controller/pci-xgene.c:511:33: sparse: expected void volatile [noderef] __iomem *mem drivers/pci/controller/pci-xgene.c:511:33: sparse: got void *bar_addr drivers/pci/controller/pci-xgene.c:512:58: sparse: expected void volatile [noderef] __iomem *mem drivers/pci/controller/pci-xgene.c:512:58: sparse: got void * vim +511 drivers/pci/controller/pci-xgene.c 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 480 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 481 static void xgene_pcie_setup_ib_reg(struct xgene_pcie_port *port, 6dce5aa59e0bf2 drivers/pci/controller/pci-xgene.c Rob Herring 2019-10-28 482 struct resource_entry *entry, 6dce5aa59e0bf2 drivers/pci/controller/pci-xgene.c Rob Herring 2019-10-28 483 u8 *ib_reg_mask) 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 484 { 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 485 void __iomem *cfg_base = port->cfg_base; d963ab22ad32da drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 486 struct device *dev = port->dev; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 487 void *bar_addr; 4ecf6b0f83523f drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 488 u32 pim_reg; 6dce5aa59e0bf2 drivers/pci/controller/pci-xgene.c Rob Herring 2019-10-28 489 u64 cpu_addr = entry->res->start; 6dce5aa59e0bf2 drivers/pci/controller/pci-xgene.c Rob Herring 2019-10-28 490 u64 pci_addr = cpu_addr - entry->offset; 6dce5aa59e0bf2 drivers/pci/controller/pci-xgene.c Rob Herring 2019-10-28 491 u64 size = resource_size(entry->res); 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 492 u64 mask = ~(size - 1) | EN_REG; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 493 u32 flags = PCI_BASE_ADDRESS_MEM_TYPE_64; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 494 u32 bar_low; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 495 int region; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 496 6dce5aa59e0bf2 drivers/pci/controller/pci-xgene.c Rob Herring 2019-10-28 497 region = xgene_pcie_select_ib_reg(ib_reg_mask, size); 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 498 if (region < 0) { d963ab22ad32da drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 499 dev_warn(dev, "invalid pcie dma-range config\n"); 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 500 return; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 501 } 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 502 6dce5aa59e0bf2 drivers/pci/controller/pci-xgene.c Rob Herring 2019-10-28 503 if (entry->res->flags & IORESOURCE_PREFETCH) 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 504 flags |= PCI_BASE_ADDRESS_MEM_PREFETCH; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 505 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 506 bar_low = pcie_bar_low_val((u32)cpu_addr, flags); 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 507 switch (region) { 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 508 case 0: 4ecf6b0f83523f drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 509 xgene_pcie_set_ib_mask(port, BRIDGE_CFG_4, flags, size); 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 @510 bar_addr = cfg_base + PCI_BASE_ADDRESS_0; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 @511 writel(bar_low, bar_addr); 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 @512 writel(upper_32_bits(cpu_addr), bar_addr + 0x4); 4ecf6b0f83523f drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 513 pim_reg = PIM1_1L; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 514 break; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 515 case 1: 8e93c5132ca2e5 drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 516 xgene_pcie_writel(port, IBAR2, bar_low); 8e93c5132ca2e5 drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 517 xgene_pcie_writel(port, IR2MSK, lower_32_bits(mask)); 4ecf6b0f83523f drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 518 pim_reg = PIM2_1L; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 519 break; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 520 case 2: 8e93c5132ca2e5 drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 521 xgene_pcie_writel(port, IBAR3L, bar_low); 8e93c5132ca2e5 drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 522 xgene_pcie_writel(port, IBAR3L + 0x4, upper_32_bits(cpu_addr)); 8e93c5132ca2e5 drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 523 xgene_pcie_writel(port, IR3MSKL, lower_32_bits(mask)); 8e93c5132ca2e5 drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 524 xgene_pcie_writel(port, IR3MSKL + 0x4, upper_32_bits(mask)); 4ecf6b0f83523f drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 525 pim_reg = PIM3_1L; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 526 break; 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 527 } 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 528 4ecf6b0f83523f drivers/pci/host/pci-xgene.c Bjorn Helgaas 2016-10-06 529 xgene_pcie_setup_pims(port, pim_reg, pci_addr, ~(size - 1)); 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 530 } 5f6b6ccdbe1cdf drivers/pci/host/pci-xgene.c Tanmay Inamdar 2014-10-01 531 :::::: The code at line 511 was first introduced by commit :::::: 5f6b6ccdbe1cdfa5aa4347ec5412509b8995db27 PCI: xgene: Add APM X-Gene PCIe driver :::::: TO: Tanmay Inamdar <tinamdar(a)apm.com&gt; :::::: CC: Bjorn Helgaas <bhelgaas(a)google.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org