Re: [PATCH 2/2] iio: adc: ti-adc161s626: use DMA-safe memory for spi_read()

[kernel test robot <lkp@intel.com>]

Hi David,

kernel test robot noticed the following build errors:

[auto build test ERROR on ff0843ceb1fb11a6b73e0e77b932ef7967aecd4b]

url:    https://github.com/intel-lab-lkp/linux/commits/David-Lechner/iio-adc-ti-adc161s626-fix-buffer-read-on-big-endian/20260315-092711
base:   ff0843ceb1fb11a6b73e0e77b932ef7967aecd4b
patch link:    https://lore.kernel.org/r/20260314-iio-adc-ti-adc161s626-fix-scan-buf-v1-2-56243b11e87b%40baylibre.com
patch subject: [PATCH 2/2] iio: adc: ti-adc161s626: use DMA-safe memory for spi_read()
config: m68k-allmodconfig (https://download.01.org/0day-ci/archive/20260327/202603271734.pnWuSmNr-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260327/202603271734.pnWuSmNr-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202603271734.pnWuSmNr-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/iio/adc/ti-adc161s626.c: In function 'ti_adc_read_measurement':
>> drivers/iio/adc/ti-adc161s626.c:87:24: error: implicit declaration of function 'get_unaligned_be16' [-Wimplicit-function-declaration]
      87 |                 *val = get_unaligned_be16(data->buf);
         |                        ^~~~~~~~~~~~~~~~~~
>> drivers/iio/adc/ti-adc161s626.c:94:24: error: implicit declaration of function 'get_unaligned_be24' [-Wimplicit-function-declaration]
      94 |                 *val = get_unaligned_be24(data->buf);
         |                        ^~~~~~~~~~~~~~~~~~


vim +/get_unaligned_be16 +87 drivers/iio/adc/ti-adc161s626.c

    75	
    76	static int ti_adc_read_measurement(struct ti_adc_data *data,
    77					   struct iio_chan_spec const *chan, int *val)
    78	{
    79		int ret;
    80	
    81		switch (data->read_size) {
    82		case 2:
    83			ret = spi_read(data->spi, data->buf, 2);
    84			if (ret)
    85				return ret;
    86	
  > 87			*val = get_unaligned_be16(data->buf);
    88			break;
    89		case 3:
    90			ret = spi_read(data->spi, data->buf, 3);
    91			if (ret)
    92				return ret;
    93	
  > 94			*val = get_unaligned_be24(data->buf);
    95			break;
    96		default:
    97			return -EINVAL;
    98		}
    99	
   100		*val = sign_extend32(*val >> data->shift, chan->scan_type.realbits - 1);
   101	
   102		return 0;
   103	}
   104	

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