Re: [PATCH v3] iio: dac: ds4422/ds4424 dac driver

From: kbuild test robot <lkp@intel.com>
To: Ismail Kose <Ismail.Kose@maximintegrated.com>
Cc: kbuild-all@01.org, ihkose@gmail.com,
	Ismail.Kose@maximintegrated.com,
	Jonathan Cameron <jic23@kernel.org>,
	Hartmut Knaack <knaack.h@gmx.de>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
	Rob Herring <robh+dt@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Maxime Roussin-Belanger <maxime.roussinbelanger@gmail.com>,
	Mike Looijmans <mike.looijmans@topic.nl>,
	Peter Rosin <peda@axentia.se>,
	Fabrice Gasnier <fabrice.gasnier@st.com>,
	Jean-Francois Dagenais <jeff.dagenais@gmail.com>,
	linux-iio@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3] iio: dac: ds4422/ds4424 dac driver
Date: Tue, 19 Sep 2017 21:34:11 +0800	[thread overview]
Message-ID: <201709192138.tC3Jo3sC%fengguang.wu@intel.com> (raw)
In-Reply-To: <20170918221029.3610-1-Ismail.Kose@maximintegrated.com>

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Hi Ismail,

[auto build test WARNING on iio/togreg]
[also build test WARNING on v4.14-rc1 next-20170919]
[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/Ismail-Kose/iio-dac-ds4422-ds4424-dac-driver/20170919-205022
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
config: ia64-allyesconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/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=ia64 

All warnings (new ones prefixed by >>):

>> drivers/iio/dac/ds4424.c:62:2: warning: 'unused' attribute ignored [-Wattributes]
     __maybe_unused uint16_t save[DS4424_MAX_DAC_CHANNELS];
     ^~~~~~~~~~~~~~
   drivers/iio/dac/ds4424.c: In function 'ds4424_parse_dt':
   drivers/iio/dac/ds4424.c:232:6: warning: unused variable 'count' [-Wunused-variable]
     int count;
         ^~~~~

vim +/unused +62 drivers/iio/dac/ds4424.c

    58	
    59	struct ds4424_data {
    60		struct i2c_client *client;
    61		struct mutex lock;
  > 62		__maybe_unused uint16_t save[DS4424_MAX_DAC_CHANNELS];
    63		uint32_t rfs_res[DS4424_MAX_DAC_CHANNELS];
    64		struct regulator *vcc_reg;
    65		uint8_t raw[DS4424_MAX_DAC_CHANNELS];
    66	};
    67	

---
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