linux-kernel - Re: [PATCH 1/2] pwm: Remove pwm_can

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Date:   Wed, 4 Jan 2017 23:20:23 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Thierry Reding <thierry.reding@...il.com>
Cc:     kbuild-all@...org, Thierry Reding <thierry.reding@...il.com>,
        devel@...verdev.osuosl.org, linux-pwm@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Johan Hovold <johan@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] pwm: Remove pwm_can_sleep()

Hi Thierry,

[auto build test ERROR on pwm/for-next]
[also build test ERROR on v4.10-rc2 next-20170104]
[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/Thierry-Reding/pwm-Remove-pwm_can_sleep/20170104-222234
base:   https://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm.git for-next
config: x86_64-randconfig-i0-201701 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/leds/leds-pwm.c: In function 'led_pwm_add':
>> drivers/leds/leds-pwm.c:115:2: error: implicit declaration of function 'pwm_can_sleep' [-Werror=implicit-function-declaration]
     led_data->can_sleep = pwm_can_sleep(led_data->pwm);
     ^
   cc1: some warnings being treated as errors

vim +/pwm_can_sleep +115 drivers/leds/leds-pwm.c

5f7b03dc Russell King     2014-04-06  109  		ret = PTR_ERR(led_data->pwm);
5f7b03dc Russell King     2014-04-06  110  		dev_err(dev, "unable to request PWM for %s: %d\n",
5f7b03dc Russell King     2014-04-06  111  			led->name, ret);
5f7b03dc Russell King     2014-04-06  112  		return ret;
5f7b03dc Russell King     2014-04-06  113  	}
5f7b03dc Russell King     2014-04-06  114  
5f7b03dc Russell King     2014-04-06 @115  	led_data->can_sleep = pwm_can_sleep(led_data->pwm);
9aa07625 Jacek Anaszewski 2015-08-20  116  	if (!led_data->can_sleep)
9aa07625 Jacek Anaszewski 2015-08-20  117  		led_data->cdev.brightness_set = led_pwm_set;
9aa07625 Jacek Anaszewski 2015-08-20  118  	else

:::::: The code at line 115 was first introduced by commit
:::::: 5f7b03dc2ab5f4ca16e5d6bc3e6dcd2953c6fede leds: leds-pwm: provide a common function to setup a single led-pwm device

:::::: TO: Russell King <rmk+kernel@....linux.org.uk>
:::::: CC: Bryan Wu <cooloney@...il.com>

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