[sj:damon/next 18/24] mm/damon/sysfs.c:96:30: error: 'counted_by' only applies to C99 flexible array members

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/sj/linux.git damon/next
head:   04cc9f72453632bf9e13e06f85c11147583e5d5d
commit: 375af4a6e206c1aeb2edb1d80cbb42fd3349b287 [18/24] mm/damon/sysfs: add __counted_by() annotation
config: arm-randconfig-001-20231219 (https://download.01.org/0day-ci/archive/20231219/202312190546.yhWbDA8A-lkp@intel.com/config)
compiler: clang version 18.0.0git (https://github.com/llvm/llvm-project 5ac12951b4e9bbfcc5791282d0961ec2b65575e9)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231219/202312190546.yhWbDA8A-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/202312190546.yhWbDA8A-lkp@intel.com/

All errors (new ones prefixed by >>):

>> mm/damon/sysfs.c:96:30: error: 'counted_by' only applies to C99 flexible array members
      96 |         struct damon_sysfs_region **regions_arr __counted_by(nr);
         |                                     ^~~~~~~~~~~
   mm/damon/sysfs.c:292:30: error: 'counted_by' only applies to C99 flexible array members
     292 |         struct damon_sysfs_target **targets_arr __counted_by(nr);
         |                                     ^~~~~~~~~~~
   mm/damon/sysfs.c:815:31: error: 'counted_by' only applies to C99 flexible array members
     815 |         struct damon_sysfs_context **contexts_arr __counted_by(nr);
         |                                      ^~~~~~~~~~~~
   mm/damon/sysfs.c:1666:31: error: 'counted_by' only applies to C99 flexible array members
    1666 |         struct damon_sysfs_kdamond **kdamonds_arr __counted_by(nr);
         |                                      ^~~~~~~~~~~~
   4 errors generated.


vim +/counted_by +96 mm/damon/sysfs.c

    89	
    90	/*
    91	 * init_regions directory
    92	 */
    93	
    94	struct damon_sysfs_regions {
    95		struct kobject kobj;
  > 96		struct damon_sysfs_region **regions_arr __counted_by(nr);
    97		int nr;
    98	};
    99	

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