Hi Nandor,

[auto build test ERROR on gpio/for-next]
[also build test ERROR on v4.11-rc6 next-20170413]
[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/Nandor-Han/XRA1403-gpio-add-XRA1403-gpio-expander-driver/20170413-215739
base:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git for-next
config: frv-allyesconfig (attached as .config)
compiler: frv-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://raw.githubusercontent.com/01org/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=frv 

All errors (new ones prefixed by >>):

   drivers//gpio/gpio-xra1403.c: In function 'xra1403_dbg_show':
>> drivers//gpio/gpio-xra1403.c:133:2: error: implicit declaration of function 'seq_puts' [-Werror=implicit-function-declaration]
     seq_puts(s, "xra reg:");
     ^~~~~~~~
>> drivers//gpio/gpio-xra1403.c:135:3: error: implicit declaration of function 'seq_printf' [-Werror=implicit-function-declaration]
      seq_printf(s, " %2.2x", reg);
      ^~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/seq_puts +133 drivers//gpio/gpio-xra1403.c

   127		struct xra1403 *xra = gpiochip_get_data(chip);
   128		int value[xra1403_regmap_cfg.max_register];
   129		int i;
   130		unsigned int gcr;
   131		unsigned int gsr;
   132	
 > 133		seq_puts(s, "xra reg:");
   134		for (reg = 0; reg <= xra1403_regmap_cfg.max_register; reg++)
 > 135			seq_printf(s, " %2.2x", reg);
   136		seq_puts(s, "\n  value:");
   137		for (reg = 0; reg < xra1403_regmap_cfg.max_register; reg++) {
   138			regmap_read(xra->regmap, reg, &value[reg]);

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