Hi Jacob,

I love your patch! Yet something to improve:

[auto build test ERROR on iommu/next]
[also build test ERROR on linux/master linus/master v5.9-rc1 next-20200821]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Jacob-Pan/IOASID-extensions-for-guest-SVA/20200822-123111
base:   https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: mips-randconfig-r015-20200822 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project b587ca93be114d07ec3bf654add97d7872325281)
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
        # 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 errors (new ones prefixed by >>):

   In file included from drivers/of/device.c:7:
   In file included from include/linux/of_iommu.h:6:
   In file included from include/linux/iommu.h:16:
>> include/linux/ioasid.h:141:1: error: unknown type name 'staic'; did you mean 'static'?
   staic inline int ioasid_attach_spid(ioasid_t ioasid, ioasid_t spid)
   ^~~~~
   static
   In file included from drivers/of/device.c:8:
   include/linux/dma-mapping.h:824:9: warning: implicit conversion from 'unsigned long long' to 'unsigned long' changes value from 18446744073709551615 to 4294967295 [-Wconstant-conversion]
           return DMA_BIT_MASK(32);
           ~~~~~~ ^~~~~~~~~~~~~~~~
   include/linux/dma-mapping.h:139:40: note: expanded from macro 'DMA_BIT_MASK'
   #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
                                          ^~~~~
   1 warning and 1 error generated.
--
   In file included from drivers/of/platform.c:20:
   In file included from include/linux/of_iommu.h:6:
   In file included from include/linux/iommu.h:16:
>> include/linux/ioasid.h:141:1: error: unknown type name 'staic'; did you mean 'static'?
   staic inline int ioasid_attach_spid(ioasid_t ioasid, ioasid_t spid)
   ^~~~~
   static
   1 error generated.

# https://github.com/0day-ci/linux/commit/09f31e901946399a274ce954bdefa4108e895b33
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Jacob-Pan/IOASID-extensions-for-guest-SVA/20200822-123111
git checkout 09f31e901946399a274ce954bdefa4108e895b33
vim +141 include/linux/ioasid.h

   140	
 > 141	staic inline int ioasid_attach_spid(ioasid_t ioasid, ioasid_t spid)
   142	{
   143		return -ENOTSUPP;
   144	}
   145	

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