[android-common:android15-6.6-2026-07 8/8] lib/test_ubsan.c:43:4: warning: variable 'data' set but not used

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

tree:   https://android.googlesource.com/kernel/common android15-6.6-2026-07
head:   407989faed8855296b26bfb40a621f478331816c
commit: aa0cf04b6959adbb54b536307d590d2a350d02d7 [8/8] ubsan: Fix panic from test_ubsan_out_of_bounds
config: arm-randconfig-001-20260716 (https://download.01.org/0day-ci/archive/20260717/202607172142.46bQ8Fn9-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260717/202607172142.46bQ8Fn9-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/202607172142.46bQ8Fn9-lkp@intel.com/

All warnings (new ones prefixed by >>):

   lib/test_ubsan.c: In function 'test_ubsan_out_of_bounds':
>> lib/test_ubsan.c:43:4: warning: variable 'data' set but not used [-Wunused-but-set-variable]
     } data;
       ^~~~
   lib/test_ubsan.c: In function 'test_ubsan_load_invalid_value':
   lib/test_ubsan.c:66:37: warning: variable 'eptr' set but not used [-Wunused-but-set-variable]
     enum ubsan_test_enum eval, eval2, *eptr;
                                        ^~~~
   lib/test_ubsan.c:65:19: warning: variable 'ptr' set but not used [-Wunused-but-set-variable]
     bool val, val2, *ptr;
                      ^~~
   At top level:
   lib/test_ubsan.c:104:28: warning: 'skip_ubsan_array' defined but not used [-Wunused-const-variable=]
    static const test_ubsan_fp skip_ubsan_array[] = {
                               ^~~~~~~~~~~~~~~~


vim +/data +43 lib/test_ubsan.c

    35	
    36	static void test_ubsan_out_of_bounds(void)
    37	{
    38		int i = 4, j = 4, k = -1;
    39		volatile struct {
    40			char above[4]; /* Protect surrounding memory. */
    41			int arr[4];
    42			char below[4]; /* Protect surrounding memory. */
  > 43		} data;
    44	
    45		OPTIMIZER_HIDE_VAR(i);
    46		OPTIMIZER_HIDE_VAR(j);
    47		OPTIMIZER_HIDE_VAR(k);
    48	
    49		UBSAN_TEST(CONFIG_UBSAN_BOUNDS, "above");
    50		data.arr[j] = i;
    51	
    52		UBSAN_TEST(CONFIG_UBSAN_BOUNDS, "below");
    53		data.arr[k] = i;
    54	}
    55	

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