Re: [PATCH] mtd: core: Add nand_id sysfs attribute for NAND devices

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

Hi,

kernel test robot noticed the following build errors:

[auto build test ERROR on mtd/mtd/next]
[also build test ERROR on mtd/mtd/fixes linus/master v6.17 next-20251010]
[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/jayxu1990-gmail-com/mtd-core-Add-nand_id-sysfs-attribute-for-NAND-devices/20251010-092101
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git mtd/next
patch link:    https://lore.kernel.org/r/20251007224049.2798233-1-jayxu1990%40gmail.com
patch subject: [PATCH] mtd: core: Add nand_id sysfs attribute for NAND devices
config: i386-buildonly-randconfig-002-20251011 (https://download.01.org/0day-ci/archive/20251012/202510120356.STGKDkA5-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251012/202510120356.STGKDkA5-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/202510120356.STGKDkA5-lkp@intel.com/

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: nand_readid_op
   >>> referenced by mtdcore.c:359 (drivers/mtd/mtdcore.c:359)
   >>>               drivers/mtd/mtdcore.o:(mtd_nand_id_show) in archive vmlinux.a

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