Hi Alastair,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.2-rc6 next-20190625]
[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/Alastair-D-Silva/Hexdump-Enhancements/20190625-224046
config: xtensa-allyesconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 7.4.0
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
        GCC_VERSION=7.4.0 make.cross ARCH=xtensa 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <redacted>

All warnings (new ones prefixed by >>):

   lib/hexdump.c: In function 'announce_skipped':

quoted

lib/hexdump.c:243:28: warning: format '%lu' expects argument of type 'long unsigned int', but argument 4 has type 'size_t {aka unsigned int}' [-Wformat=]

     printk("%s%s ** Skipped %lu bytes of value 0x%x **\n",
                             ~~^
                             %u

vim +243 lib/hexdump.c

   236	
   237	static void announce_skipped(const char *level, const char *prefix_str,
   238					   u8 val, size_t count)
   239	{
   240		if (count == 0)
   241			return;
   242	
 > 243		printk("%s%s ** Skipped %lu bytes of value 0x%x **\n",
   244		       level, prefix_str, count, val);
   245	}
   246	

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