[intel-tdx:guest 39/106] drivers/pci/msi.c:685:9: warning: incompatible integer to pointer conversion returning 'int' from a function with result type 'void *'

kernel test robot
2021-07-28T00:59:46Z

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tree: https://github.com/intel/tdx.git guest
head: 2fd34c2d8c2ec22dd7b1d191ec53a2491adf2259
commit: 1cc1ca45ae8d0f3bb82c851a6ef440cd6b4b8812 [39/106] pci: Mark MSI data shared
config: mips-randconfig-r011-20210727 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project c658b472f3e61e1818e1909bf02f3d65470018a5)
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
# install mips cross compiling tool for clang build
# apt-get install binutils-mips-linux-gnu
# https://github.com/intel/tdx/commit/1cc1ca45ae8d0f3bb82c851a6ef440cd6b4b8812
git remote add intel-tdx https://github.com/intel/tdx.git
git fetch --no-tags intel-tdx guest
git checkout 1cc1ca45ae8d0f3bb82c851a6ef440cd6b4b8812
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

drivers/pci/msi.c:685:9: error: implicit declaration of function 'ioremap_shared' [-Werror,-Wimplicit-function-declaration]
return ioremap_shared(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE);
^
>> drivers/pci/msi.c:685:9: warning: incompatible integer to pointer conversion returning 'int' from a function with result type 'void *' [-Wint-conversion]
return ioremap_shared(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning and 1 error generated.

vim +685 drivers/pci/msi.c

667
668 static void __iomem *msix_map_region(struct pci_dev *dev, unsigned nr_entries)
669 {
670 resource_size_t phys_addr;
671 u32 table_offset;
672 unsigned long flags;
673 u8 bir;
674
675 pci_read_config_dword(dev, dev->msix_cap + PCI_MSIX_TABLE,
676 &table_offset);
677 bir = (u8)(table_offset & PCI_MSIX_TABLE_BIR);
678 flags = pci_resource_flags(dev, bir);
679 if (!flags || (flags & IORESOURCE_UNSET))
680 return NULL;
681
682 table_offset &= PCI_MSIX_TABLE_OFFSET;
683 phys_addr = pci_resource_start(dev, bir) + table_offset;
684
> 685 return ioremap_shared(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE);
686 }
687

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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