[miquelraynal:nvmem-layouts-and-of-cleanup 20/57] drivers/nvmem/core.c:770:9: error: implicit declaration of function 'of_device_node_request_module'

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

tree:   https://github.com/miquelraynal/linux-0day.git nvmem-layouts-and-of-cleanup
head:   d8752324726fdde6bb205a5aa95ae8ff7d84eff7
commit: b3a67512c995dbf8f71e14e7df1278ee7c6d26ca [20/57] nvmem: core: request layout modules loading
config: riscv-randconfig-r042-20230305 (https://download.01.org/0day-ci/archive/20230308/202303080730.Qtk3lUUd-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/miquelraynal/linux-0day/commit/b3a67512c995dbf8f71e14e7df1278ee7c6d26ca
        git remote add miquelraynal https://github.com/miquelraynal/linux-0day.git
        git fetch --no-tags miquelraynal nvmem-layouts-and-of-cleanup
        git checkout b3a67512c995dbf8f71e14e7df1278ee7c6d26ca
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303080730.Qtk3lUUd-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/nvmem/core.c: In function 'nvmem_layout_get':
>> drivers/nvmem/core.c:770:9: error: implicit declaration of function 'of_device_node_request_module' [-Werror=implicit-function-declaration]
     770 |         of_device_node_request_module(layout_np);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/of_device_node_request_module +770 drivers/nvmem/core.c

   755	
   756	static struct nvmem_layout *nvmem_layout_get(struct nvmem_device *nvmem)
   757	{
   758		struct device_node *layout_np, *np = nvmem->dev.of_node;
   759		struct nvmem_layout *l, *layout = ERR_PTR(-EPROBE_DEFER);
   760	
   761		layout_np = of_get_child_by_name(np, "nvmem-layout");
   762		if (!layout_np)
   763			return NULL;
   764	
   765		/*
   766		 * In case the nvmem device was built-in while the layout was built as a
   767		 * module, we shall manually request the layout driver loading otherwise
   768		 * we'll never have any match.
   769		 */
 > 770		of_device_node_request_module(layout_np);
   771	
   772		spin_lock(&nvmem_layout_lock);
   773	
   774		list_for_each_entry(l, &nvmem_layouts, node) {
   775			if (of_match_node(l->of_match_table, layout_np)) {
   776				if (try_module_get(l->owner))
   777					layout = l;
   778	
   779				break;
   780			}
   781		}
   782	
   783		spin_unlock(&nvmem_layout_lock);
   784		of_node_put(layout_np);
   785	
   786		return layout;
   787	}
   788	

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