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Subjectdrivers/vfio/vfio_iommu_type1.c:2147:35: warning: cast to smaller integer type 'enum iommu_cap' from 'void *'
Hi Robin,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d4252071b97d2027d246f6a82cbee4d52f618b47
commit: eed20c782aea57b7efb42af2905dc381268b21e9 vfio/type1: Simplify bus_type determination
date: 6 weeks ago
config: arm64-randconfig-r034-20220810 (https://download.01.org/0day-ci/archive/20220810/202208101119.7unZx9dJ-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 5f1c7e2cc5a3c07cbc2412e851a7283c1841f520)
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 arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eed20c782aea57b7efb42af2905dc381268b21e9
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout eed20c782aea57b7efb42af2905dc381268b21e9
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/vfio/

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

All warnings (new ones prefixed by >>):

>> drivers/vfio/vfio_iommu_type1.c:2147:35: warning: cast to smaller integer type 'enum iommu_cap' from 'void *' [-Wvoid-pointer-to-enum-cast]
return device_iommu_capable(dev, (enum iommu_cap)data);
^~~~~~~~~~~~~~~~~~~~
1 warning generated.


vim +2147 drivers/vfio/vfio_iommu_type1.c

2143
2144 /* Redundantly walks non-present capabilities to simplify caller */
2145 static int vfio_iommu_device_capable(struct device *dev, void *data)
2146 {
> 2147 return device_iommu_capable(dev, (enum iommu_cap)data);
2148 }
2149

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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