Hi Miquel, kernel test robot noticed the following build warnings: [auto build test WARNING on robh/for-next] [also build test WARNING on char-misc/char-misc-testing char-misc/char-misc-next char-misc/char-misc-linus linus/master v6.6-rc4 next-20231005] [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/Miquel-Raynal/of-device-Export-of_device_make_bus_id/20231005-062417 base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next patch link: https://lore.kernel.org/r/20231004222236.411248-6-miquel.raynal%40bootlin.com patch subject: [PATCH v11 5/7] nvmem: core: Rework layouts to become regular devices config: sh-defconfig (https://download.01.org/0day-ci/archive/20231005/202310051638.C8Yz2WIY-lkp@xxxxxxxxx/config) compiler: sh4-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231005/202310051638.C8Yz2WIY-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202310051638.C8Yz2WIY-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/nvmem/layouts.c:19:5: warning: "CONFIG_OF" is not defined, evaluates to 0 [-Wundef] 19 | #if CONFIG_OF | ^~~~~~~~~ vim +/CONFIG_OF +19 drivers/nvmem/layouts.c 18 > 19 #if CONFIG_OF 20 static int nvmem_layout_bus_match(struct device *dev, struct device_driver *drv) 21 { 22 return of_driver_match_device(dev, drv); 23 } 24 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki