Hi,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on char-misc/master]

url:    https://github.com/0day-ci/linux/commits/min-li-xe-renesas-com/misc-Add-Renesas-Synchronization-Management-Unit-SMU-support/20210318-052232
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git b3a9e3b9622ae10064826dccb4f7a52bd88c7407
config: x86_64-randconfig-a013-20210317 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 6db3ab2903f42712f44000afb5aa467efbd25f35)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/f1c28c63e2514eac89cce46df118039da7c21e47
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review min-li-xe-renesas-com/misc-Add-Renesas-Synchronization-Management-Unit-SMU-support/20210318-052232
        git checkout f1c28c63e2514eac89cce46df118039da7c21e47
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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 <built-in>:1:
>> ./usr/include/linux/rsmu.h:14:2: error: unknown type name '__u8'
           __u8 dpll;
           ^
   ./usr/include/linux/rsmu.h:15:2: error: unknown type name '__u8'
           __u8 mode;
           ^
   ./usr/include/linux/rsmu.h:20:2: error: unknown type name '__u8'
           __u8 dpll;
           ^
   ./usr/include/linux/rsmu.h:21:2: error: unknown type name '__u8'
           __u8 state;
           ^
   ./usr/include/linux/rsmu.h:26:2: error: unknown type name '__u8'
           __u8 dpll;
           ^
>> ./usr/include/linux/rsmu.h:27:2: error: unknown type name '__s64'
           __s64 ffo;
           ^
   6 errors generated.

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