Hi Crestez,

[auto build test WARNING on iio/togreg]
[also build test WARNING on v4.6-rc2 next-20160404]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Crestez-Dan-Leonard/Add-support-for-adc101c-and-adc121c/20160405-022459
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
config: s390-allmodconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=s390 

All warnings (new ones prefixed by >>):

   drivers/iio/adc/ti-adc081c.c: In function 'adc081c_trigger_handler':
>> drivers/iio/adc/ti-adc081c.c:130:1: warning: 'adc081c_trigger_handler' uses dynamic stack allocation
    }
    ^

vim +/adc081c_trigger_handler +130 drivers/iio/adc/ti-adc081c.c

   114	static irqreturn_t adc081c_trigger_handler(int irq, void *p)
   115	{
   116		struct iio_poll_func *pf = p;
   117		struct iio_dev *indio_dev = pf->indio_dev;
   118		struct adc081c *data = iio_priv(indio_dev);
   119		u16 buf[indio_dev->scan_bytes / 2];
   120		int ret;
   121	
   122		ret = i2c_smbus_read_word_swapped(data->i2c, REG_CONV_RES);
   123		if (ret < 0)
   124			goto out;
   125		buf[0] = ret;
   126		iio_push_to_buffers_with_timestamp(indio_dev, buf, iio_get_time_ns());
   127	out:
   128		iio_trigger_notify_done(indio_dev->trig);
   129		return IRQ_HANDLED;
 > 130	}
   131	
   132	static int adc081c_probe(struct i2c_client *client,
   133				 const struct i2c_device_id *id)
   134	{
   135		struct iio_dev *iio;
   136		struct adc081c *adc;
   137		struct adcxx1c_model *model = (struct adcxx1c_model*)id->driver_data;
   138		int err;

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