Hi Mathieu,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on powerpc/next]
[also build test WARNING on v4.16 next-20180413]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Mathieu-Malaterre/powerpc-sparse-fix-plain-integer-as-NULL-pointer-warning/20180413-144954
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-allyesconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc 

All warnings (new ones prefixed by >>):

   drivers/macintosh/via-pmu.c: In function 'pmu_present':

quoted

drivers/macintosh/via-pmu.c:1752:9: warning: return makes integer from pointer without a cast [-Wint-conversion]

     return via;
            ^~~

vim +1752 drivers/macintosh/via-pmu.c

  1748	
  1749	int
  1750	pmu_present(void)
  1751	{

1752		return via;

  1753	}
  1754	

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