tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 136057256686de39cc3a07c2e39ef6bc43003ff6 commit: 6e5a1fff9096ecd259dedcbbdc812aa90986a40e PCI: Avoid building empty drivers date: 9 months ago config: alpha-randconfig-s032-20211117 (https://download.01.org/0day-ci/archive/20211124/202111240751.80Rfb1Es-lk...) compiler: alpha-linux-gcc (GCC) 11.2.0 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: v0.6.4-dirty # 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 fetch --no-tags linus master git checkout 6e5a1fff9096ecd259dedcbbdc812aa90986a40e # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=alpha 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 >>) drivers/pci/controller/dwc/pcie-hisi.c:61:37: sparse: expected void [noderef] __iomem *reg_base drivers/pci/controller/dwc/pcie-hisi.c:61:37: sparse: got void *priv drivers/pci/controller/dwc/pcie-hisi.c:132:19: sparse: expected void *priv drivers/pci/controller/dwc/pcie-hisi.c:132:19: sparse: got void [noderef] __iomem *[assigned] reg_base vim +61 drivers/pci/controller/dwc/pcie-hisi.c 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 56 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 57 static void __iomem *hisi_pcie_map_bus(struct pci_bus *bus, unsigned int devfn, 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 58 int where) 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 59 { 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 60 struct pci_config_window *cfg = bus->sysdata; 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 @61 void __iomem *reg_base = cfg->priv; 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 62 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 63 if (bus->number == cfg->busr.start) 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 64 return reg_base + where; 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 65 else 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 66 return pci_ecam_map_bus(bus, devfn, where); 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 67 } 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 68 a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 69 #if defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS) a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 70 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 71 static int hisi_pcie_init(struct pci_config_window *cfg) 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 72 { 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 73 struct device *dev = cfg->parent; 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 74 struct acpi_device *adev = to_acpi_device(dev); 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 75 struct acpi_pci_root *root = acpi_driver_data(adev); 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 76 struct resource *res; 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 77 void __iomem *reg_base; 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 78 int ret; 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 79 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 80 /* 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 81 * Retrieve RC base and size from a HISI0081 device with _UID 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 82 * matching our segment. 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 83 */ 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 84 res = devm_kzalloc(dev, sizeof(*res), GFP_KERNEL); 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 85 if (!res) 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 86 return -ENOMEM; 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 87 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 88 ret = acpi_get_rc_resources(dev, "HISI0081", root->segment, res); 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 89 if (ret) { 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 90 dev_err(dev, "can't get rc base address\n"); 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 91 return -ENOMEM; 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 92 } 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 93 e313a447e73527 drivers/pci/dwc/pcie-hisi.c Lorenzo Pieralisi 2017-04-19 94 reg_base = devm_pci_remap_cfgspace(dev, res->start, resource_size(res)); 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 95 if (!reg_base) 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 96 return -ENOMEM; 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 97 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 98 cfg->priv = reg_base; 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 99 return 0; 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 100 } 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 101 0b104773b4f72c drivers/pci/controller/dwc/pcie-hisi.c Rob Herring 2020-04-09 102 const struct pci_ecam_ops hisi_pcie_ops = { 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 103 .init = hisi_pcie_init, 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 104 .pci_ops = { 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 105 .map_bus = hisi_pcie_map_bus, 4788316f743539 drivers/pci/host/pcie-hisi.c Bjorn Helgaas 2017-02-07 106 .read = hisi_pcie_rd_conf, 4788316f743539 drivers/pci/host/pcie-hisi.c Bjorn Helgaas 2017-02-07 107 .write = hisi_pcie_wr_conf, 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 108 } 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 109 }; 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 110 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 111 #endif 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 112 5f00f1a0178cf5 drivers/pci/host/pcie-hisi.c Dongdong Liu 2016-12-01 113 #ifdef CONFIG_PCI_HISI 500a1d9a43e0a1 drivers/pci/host/pcie-hisi.c Zhou Wang 2015-10-29 114 a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 115 static int hisi_pcie_platform_init(struct pci_config_window *cfg) a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 116 { a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 117 struct device *dev = cfg->parent; a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 118 struct platform_device *pdev = to_platform_device(dev); a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 119 struct resource *res; a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 120 void __iomem *reg_base; a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 121 a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 122 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 123 if (!res) { a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 124 dev_err(dev, "missing \"reg[1]\"property\n"); a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 125 return -EINVAL; a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 126 } a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 127 e313a447e73527 drivers/pci/dwc/pcie-hisi.c Lorenzo Pieralisi 2017-04-19 128 reg_base = devm_pci_remap_cfgspace(dev, res->start, resource_size(res)); a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 129 if (!reg_base) a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 130 return -ENOMEM; a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 131 a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 @132 cfg->priv = reg_base; a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 133 return 0; a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 134 } a2ec1996098c7d drivers/pci/host/pcie-hisi.c Dongdong Liu 2017-02-06 135 :::::: The code at line 61 was first introduced by commit :::::: 5f00f1a0178cf52928366a5e1f376a65f1f3f389 PCI: Add MCFG quirks for HiSilicon Hip05/06/07 host controllers :::::: TO: Dongdong Liu <liudongdong3(a)huawei.com&gt; :::::: CC: Bjorn Helgaas <helgaas(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org