[PATCH] powerpc/xmon: Add support for dump in reverse

[kbuild test robot]

Hi Balbir,

[auto build test ERROR on powerpc/next]
[also build test ERROR on v4.9-rc5 next-20161117]
[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/Balbir-Singh/powerpc-xmon-Add-support-for-dump-in-reverse/20161118-081358
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-ppc64e_defconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc 

Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings

All errors (new ones prefixed by >>):

   arch/powerpc/xmon/xmon.c: In function 'prdump':
>> arch/powerpc/xmon/xmon.c:2431:10: error: 'idx' may be used uninitialized in this function [-Werror=maybe-uninitialized]
         idx -= 2;
         ~~~~^~~~
   cc1: all warnings being treated as errors

vim +/idx +2431 arch/powerpc/xmon/xmon.c

  2425				}
  2426	
  2427				if (m < nr) {
  2428					if (reverse) {
  2429						buf[idx + 1] = digithex(temp[m] % 16);
  2430						buf[idx] = digithex(temp[m] / 16);
> 2431						idx -= 2;
  2432					} else
  2433						printf("%.2x", temp[m]);
  2434				} else

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