Hi Heiner,

I love your patch! Yet something to improve:

[auto build test ERROR on net-next/master]
[also build test ERROR on v5.4-rc7 next-20191113]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Heiner-Kallweit/r8169-use-rtl821x_modify_extpage-exported-from-Realtek-PHY-driver/20191113-172323
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git e0580b50d9d4b61d6c56085acdc2bb01c040aca9
config: x86_64-randconfig-a001-201945 (attached as .config)
compiler: gcc-7 (Debian 7.4.0-14) 7.4.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

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

All errors (new ones prefixed by >>):

   In file included from <command-line>:0:0:
>> include/linux/realtek_phy.h:6:16: error: unknown type name 'u16'
          int reg, u16 mask, u16 val);
                   ^~~
   include/linux/realtek_phy.h:6:26: error: unknown type name 'u16'
          int reg, u16 mask, u16 val);
                             ^~~

vim +/u16 +6 include/linux/realtek_phy.h

     4	
     5	int rtl821x_modify_extpage(struct phy_device *phydev, int extpage,
   > 6				   int reg, u16 mask, u16 val);
     7	

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