linux-kernel - ERROR: modpost: "devm_gpiochip_add_data_with_key" [drivers/iio/adc/rohm-bd79124.ko] undefined!

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Message-ID: <202508131533.5sSkq80B-lkp@intel.com>
Date: Wed, 13 Aug 2025 15:27:46 +0800
From: kernel test robot <lkp@...el.com>
To: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
	Matti Vaittinen <mazziesaccount@...il.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: ERROR: modpost: "devm_gpiochip_add_data_with_key"
 [drivers/iio/adc/rohm-bd79124.ko] undefined!

Hi Matti,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8742b2d8935f476449ef37e263bc4da3295c7b58
commit: 3f57a3b9ab74e8b6e00198af86ba41dcffa5509b iio: adc: Support ROHM BD79124 ADC
date:   4 months ago
config: csky-randconfig-r123-20250813 (https://download.01.org/0day-ci/archive/20250813/202508131533.5sSkq80B-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 10.5.0
reproduce: (https://download.01.org/0day-ci/archive/20250813/202508131533.5sSkq80B-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508131533.5sSkq80B-lkp@intel.com/

All errors (new ones prefixed by >>, old ones prefixed by <<):

WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fpga/tests/fpga-mgr-test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fpga/tests/fpga-bridge-test.o
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/fpga/tests/fpga-region-test.o
>> ERROR: modpost: "devm_gpiochip_add_data_with_key" [drivers/iio/adc/rohm-bd79124.ko] undefined!
>> ERROR: modpost: "gpiochip_get_data" [drivers/iio/adc/rohm-bd79124.ko] undefined!

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for LEDS_EXPRESSWIRE
   Depends on [n]: GPIOLIB [=n] || NEW_LEDS [=y] && GPIOLIB [=n]
   Selected by [y]:
   - BACKLIGHT_KTD2801 [=y] && HAS_IOMEM [=y] && BACKLIGHT_CLASS_DEVICE [=y]

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki