Re: [PATCH v4 4/7] nvmem: add support for device and sysfs-based cell lookups

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

Hi Oleksij,

kernel test robot noticed the following build errors:

[auto build test ERROR on sre-power-supply/for-next]
[also build test ERROR on broonie-regulator/for-next rafael-pm/thermal linus/master v6.14-rc5 next-20250306]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Oleksij-Rempel/power-Extend-power_on_reason-h-for-upcoming-PSCRR-framework/20250306-174233
base:   https://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply.git for-next
patch link:    https://lore.kernel.org/r/20250306093900.2199442-5-o.rempel%40pengutronix.de
patch subject: [PATCH v4 4/7] nvmem: add support for device and sysfs-based cell lookups
config: s390-randconfig-001-20250307 (https://download.01.org/0day-ci/archive/20250307/202503072059.sFFL62LS-lkp@intel.com/config)
compiler: s390-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250307/202503072059.sFFL62LS-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/202503072059.sFFL62LS-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   In file included from net/ethernet/eth.c:46:
>> include/linux/nvmem-consumer.h:115:20: warning: no previous prototype for 'nvmem_cell_get_by_sysfs_name' [-Wmissing-prototypes]
     115 | struct nvmem_cell *nvmem_cell_get_by_sysfs_name(struct nvmem_device *nvmem,
         |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/nvmem-consumer.h:197:22: warning: no previous prototype for 'nvmem_device_get_by_name' [-Wmissing-prototypes]
     197 | struct nvmem_device *nvmem_device_get_by_name(const char *name)
         |                      ^~~~~~~~~~~~~~~~~~~~~~~~
--
   s390-linux-ld: net/ethernet/eth.o: in function `nvmem_cell_get_by_sysfs_name':
>> eth.c:(.text+0x16a0): multiple definition of `nvmem_cell_get_by_sysfs_name'; drivers/net/phy/dp83867.o:dp83867.c:(.text+0x18d0): first defined here
   s390-linux-ld: net/ethernet/eth.o: in function `nvmem_device_get_by_name':
>> eth.c:(.text+0x16a8): multiple definition of `nvmem_device_get_by_name'; drivers/net/phy/dp83867.o:dp83867.c:(.text+0x18d8): first defined here

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