Hi,

[auto build test ERROR on battery/master]
[also build test ERROR on v4.7-rc4 next-20160624]
[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/Wenyou-Yang/power-act8945a_charger-Improvements/20160624-153641
base:   git://git.infradead.org/battery-2.6.git master
config: x86_64-randconfig-s1-06241859 (attached as .config)
compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

Note: the linux-review/Wenyou-Yang/power-act8945a_charger-Improvements/20160624-153641 HEAD 07219a8e44d2a15ec36d4a85dc98229c8cc6d858 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   drivers/power/act8945a_charger.c: In function 'act8945a_charger_config':
>> drivers/power/act8945a_charger.c:279:2: error: 'ret' undeclared (first use in this function)
     ret = regmap_read(regmap, ACT8945A_APCH_CFG, &tmp);
     ^~~
   drivers/power/act8945a_charger.c:279:2: note: each undeclared identifier is reported only once for each function it appears in

vim +/ret +279 drivers/power/act8945a_charger.c

   273	
   274		if (!np) {
   275			dev_err(dev, "no charger of node\n");
   276			return -EINVAL;
   277		}
   278	
 > 279		ret = regmap_read(regmap, ACT8945A_APCH_CFG, &tmp);
   280		if (ret)
   281			return ret;
   282	

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