[chenxing:mstar_v6_5_reorder 558/700] include/linux/mod_devicetable.h:285:28: error: 'CONFIG_OF_COMPATIBLE_MAX_LEN' undeclared here (not in a function)

tree:   https://github.com/linux-chenxing/linux.git mstar_v6_5_reorder
head:   1a5c60e65ea399670a5384b869c4958338af2799
commit: b7d5076da46c7e185995d14f63385bc05766ff08 [558/700] of: Allow the user to override the maximum length of compatible strings
config: alpha-allnoconfig (https://download.01.org/0day-ci/archive/20260729/[email protected]/config)
compiler: alpha-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260729/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All errors (new ones prefixed by >>):

   In file included from scripts/mod/devicetable-offsets.c:3:
>> include/linux/mod_devicetable.h:285:28: error: 'CONFIG_OF_COMPATIBLE_MAX_LEN' undeclared here (not in a function)
     285 |         char    compatible[CONFIG_OF_COMPATIBLE_MAX_LEN];
         |                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   make[3]: *** [scripts/Makefile.build:116: scripts/mod/devicetable-offsets.s] Error 1
   make[3]: Target 'scripts/mod/' not remade because of errors.
   make[2]: *** [Makefile:1286: prepare0] Error 2
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:234: __sub-make] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:234: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +/CONFIG_OF_COMPATIBLE_MAX_LEN +285 include/linux/mod_devicetable.h

   278	
   279	/*
   280	 * Struct used for matching a device
   281	 */
   282	struct of_device_id {
   283		char	name[32];
   284		char	type[32];
 > 285		char	compatible[CONFIG_OF_COMPATIBLE_MAX_LEN];
   286		const void *data;
   287	};
   288	

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki