Re: ERROR: modpost: "gpmc_omap_get_nand_ops" [drivers/mtd/nand/raw/omap2_nand.ko] undefined!

Roger Quadros
2022-01-17T12:35:25Z

Hi,

On 17/01/2022 12:51, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: 0c947b893d69231a9add855939da7c66237ab44f
> commit: dbcb124acebd8148e9e858a231f1798956dd3ca6 mtd: rawnand: omap2: Select GPMC device driver for ARCH_K3
> date: 4 weeks ago
> config: arm64-randconfig-r001-20220117 (https://download.01.org/0day-ci/archive/20220117/202201171805.5HeoR4rS-lkp@intel.com/config)
> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5f782d25a742302d25ef3c8b84b54f7483c2deb9)
> 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
> # install arm64 cross compiling tool for clang build
> # apt-get install binutils-aarch64-linux-gnu
> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dbcb124acebd8148e9e858a231f1798956dd3ca6
> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git fetch --no-tags linus master
> git checkout dbcb124acebd8148e9e858a231f1798956dd3ca6
> # save the config file to linux build tree
> mkdir build_dir
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All errors (new ones prefixed by >>, old ones prefixed by <<):
>
>>> ERROR: modpost: "gpmc_omap_get_nand_ops" [drivers/mtd/nand/raw/omap2_nand.ko] undefined!

The issue is that CONFIG_MEMORY is not set so OMAP_GPMC driver is not built causing the above undefined symbol error.

>
> Kconfig warnings: (for reference only)
> WARNING: unmet direct dependencies detected for OMAP_GPMC
> Depends on MEMORY && OF_ADDRESS
> Selected by
> - MTD_NAND_OMAP2 && MTD && MTD_RAW_NAND && (ARCH_OMAP2PLUS || ARCH_KEYSTONE || COMPILE_TEST && HAS_IOMEM && ARCH_K3
>

A possible fix would be to select MEMORY along with OMAP_GPMC at the below location

config MTD_NAND_OMAP2
tristate "OMAP2, OMAP3, OMAP4 and Keystone NAND controller"
depends on ARCH_OMAP2PLUS || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
depends on HAS_IOMEM
select MEMORY
^^
select OMAP_GPMC if ARCH_K3
help
Support for NAND flash on Texas Instruments OMAP2, OMAP3, OMAP4
and Keystone platforms.

Is this OK?

> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
>

cheers,
-roger