[PATCH] powerpc/powernv/pci: Work around races in PCI bridge enabling

[kbuild test robot]

Hi Benjamin,

I love your patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on v4.18 next-20180817]
[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/Benjamin-Herrenschmidt/powerpc-powernv-pci-Work-around-races-in-PCI-bridge-enabling/20180817-113453
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-defconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.2.0 make.cross ARCH=powerpc 

All errors (new ones prefixed by >>):

   arch/powerpc/platforms/powernv/pci-ioda.c: In function 'pnv_pci_enable_bridges':
>> arch/powerpc/platforms/powernv/pci-ioda.c:3262:18: error: unused variable 'pdev' [-Werror=unused-variable]
     struct pci_dev *pdev;
                     ^~~~
>> arch/powerpc/platforms/powernv/pci-ioda.c:3261:18: error: unused variable 'bus' [-Werror=unused-variable]
     struct pci_bus *bus;
                     ^~~
>> arch/powerpc/platforms/powernv/pci-ioda.c:3260:18: error: unused variable 'phb' [-Werror=unused-variable]
     struct pnv_phb *phb;
                     ^~~
   cc1: all warnings being treated as errors

vim +/pdev +3262 arch/powerpc/platforms/powernv/pci-ioda.c

  3256	
  3257	static void pnv_pci_enable_bridges(void)
  3258	{
  3259		struct pci_controller *hose;
> 3260		struct pnv_phb *phb;
> 3261		struct pci_bus *bus;
> 3262		struct pci_dev *pdev;
  3263	
  3264		list_for_each_entry(hose, &hose_list, list_node)
  3265			pnv_pci_enable_bridge(hose->bus);
  3266	}
  3267	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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