Hi Sudeep,

[auto build test ERROR on next-20161116]

url:    
https://github.com/0day-ci/linux/commits/Sudeep-Holla/Input-gpio_keys-set-input-direction-explicitly-for-gpio-keys/20161116-202319
config: x86_64-randconfig-x017-201646 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/input/keyboard/gpio_keys.c: In function 'gpio_keys_setup_key':
>> drivers/input/keyboard/gpio_keys.c:506:4: error: 'flags' undeclared (first 
>> use in this function)
       flags |= GPIOF_ACTIVE_LOW;
       ^~~~~
   drivers/input/keyboard/gpio_keys.c:506:4: note: each undeclared identifier 
is reported only once for each function it appears in

vim +/flags +506 drivers/input/keyboard/gpio_keys.c

700a38b2 Dmitry Torokhov    2016-10-19  500     } else if 
(gpio_is_valid(button->gpio)) {
5feeca3c Geert Uytterhoeven 2016-10-19  501             /*
5feeca3c Geert Uytterhoeven 2016-10-19  502              * Legacy GPIO number, 
so request the GPIO here and
5feeca3c Geert Uytterhoeven 2016-10-19  503              * convert it to 
descriptor.
5feeca3c Geert Uytterhoeven 2016-10-19  504              */
5feeca3c Geert Uytterhoeven 2016-10-19  505             if (button->active_low)
5feeca3c Geert Uytterhoeven 2016-10-19 @506                     flags |= 
GPIOF_ACTIVE_LOW;
bc8f1eaf Ben Dooks          2009-11-10  507  
5feeca3c Geert Uytterhoeven 2016-10-19  508             error = 
devm_gpio_request_one(&pdev->dev, button->gpio, flags,
5feeca3c Geert Uytterhoeven 2016-10-19  509                                     
      desc);

:::::: The code at line 506 was first introduced by commit
:::::: 5feeca3c1e39c01f9ef5abc94dea94021ccf94fc Input: gpio_keys - add support 
for GPIO descriptors

:::::: TO: Geert Uytterhoeven <geert+rene...@glider.be>
:::::: CC: Dmitry Torokhov <dmitry.torok...@gmail.com>

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