Hi, [auto build test WARNING on pci/next] [also build test WARNING on v4.7-rc3 next-20160609] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Bjorn-Helgaas/PCI-Precision-Time-Measurement-support/20160614-031902 base: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git next config: i386-defconfig (attached as .config) compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430 reproduce: # save the attached .config to linux build tree make ARCH=i386 Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): drivers/pci/pcie/ptm.c: In function 'pci_enable_ptm': >> drivers/pci/pcie/ptm.c:129:28: warning: 'ups' may be used uninitialized in >> this function [-Wmaybe-uninitialized] dev->ptm_granularity = ups->ptm_granularity; ~~~^~~~~~~~~~~~~~~~~ vim +/ups +129 drivers/pci/pcie/ptm.c 113 * For Root Complex Integrated Endpoints, there is no upstream 114 * device, so there must be some implementation-specific way to 115 * associate the endpoint with a time source. 116 */ 117 if (pci_pcie_type(dev) == PCI_EXP_TYPE_ENDPOINT) { 118 /* PTM is only useful if an upstream device has it enabled */ 119 ups = pci_upstream_bridge(dev); 120 if (!ups || !ups->ptm_enabled) 121 return -EINVAL; 122 } else if (pci_pcie_type(dev) != PCI_EXP_TYPE_RC_END) 123 return -EINVAL; 124 125 pci_read_config_dword(dev, pos + PCI_PTM_CAP, &cap); 126 if (!(cap & PCI_PTM_CAP_REQ)) 127 return -EINVAL; 128 > 129 dev->ptm_granularity = ups->ptm_granularity; 130 131 ctrl = PCI_PTM_CTRL_ENABLE; 132 pci_write_config_dword(dev, pos + PCI_PTM_CTRL, ctrl); 133 dev->ptm_enabled = 1; 134 135 pci_ptm_info(dev); 136 137 if (granularity) --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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