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-x001-201646 (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_polled.c: In function 'gpio_keys_polled_probe':
>> drivers/input/keyboard/gpio_keys_polled.c:323:5: error: 'flags' undeclared (first use in this function)
        flags |= GPIOF_ACTIVE_LOW;
        ^~~~~
   drivers/input/keyboard/gpio_keys_polled.c:323:5: note: each undeclared identifier is reported only once for each function it appears in

vim +/flags +323 drivers/input/keyboard/gpio_keys_polled.c

0f78ba96 Dmitry Torokhov 2016-02-23  317  		} else if (gpio_is_valid(button->gpio)) {
633a21d8 Aaron Lu        2014-10-21  318  			/*
633a21d8 Aaron Lu        2014-10-21  319  			 * Legacy GPIO number so request the GPIO here and
633a21d8 Aaron Lu        2014-10-21  320  			 * convert it to descriptor.
633a21d8 Aaron Lu        2014-10-21  321  			 */
633a21d8 Aaron Lu        2014-10-21  322  			if (button->active_low)
633a21d8 Aaron Lu        2014-10-21 @323  				flags |= GPIOF_ACTIVE_LOW;
633a21d8 Aaron Lu        2014-10-21  324  
633a21d8 Aaron Lu        2014-10-21  325  			error = devm_gpio_request_one(&pdev->dev, button->gpio,
633a21d8 Aaron Lu        2014-10-21  326  					flags, button->desc ? : DRV_NAME);

:::::: The code at line 323 was first introduced by commit
:::::: 633a21d80b4a2cd648aa2dacdb22494ffb2f28f0 input: gpio_keys_polled: Add support for GPIO descriptors

:::::: TO: Aaron Lu <aaron.lu@intel.com>
:::::: CC: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

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