dirty_log_perf_test.c:284:17: warning: 'bitmaps' may be used uninitialized

:::::: 
:::::: Manual check reason: "low confidence bisect report"
:::::: Manual check reason: "likely FALSE maybe-used-uninitialized warning on old compiler"
:::::: 

BCC: [email protected]
CC: [email protected]
TO: Leonardo Bras <[email protected]>
CC: 0day robot <[email protected]>

tree:   https://github.com/intel-lab-lkp/linux/commits/Leonardo-Bras/KVM-selftests-memstress-Add-option-to-enable-dirty-ring-on-VM-creation/20260813-140437
head:   441c3e64a7ec5b92b4fd0a61d6181f8ac74ad302
commit: 441c3e64a7ec5b92b4fd0a61d6181f8ac74ad302 KVM: selftests: dirty_log_perf_test: Add dirty-ring support
date:   3 days ago
:::::: branch date: 3 days ago
:::::: commit date: 3 days ago
config: arm64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20260816/[email protected]/config)
compiler: aarch64-linux-gnu-gcc (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260816/[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/r/[email protected]/

Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings

All warnings (new ones prefixed by >>):

   dirty_log_perf_test.c: In function 'run_test':
>> dirty_log_perf_test.c:284:17: warning: 'bitmaps' may be used uninitialized [-Wmaybe-uninitialized]
     284 |                 memstress_get_dirty_log(vm, bitmaps, p->slots);
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   dirty_log_perf_test.c:174:25: note: 'bitmaps' was declared here
     174 |         unsigned long **bitmaps;
         |                         ^~~~~~~
   At top level:
   cc1: note: unrecognized command-line option '-Wno-gnu-variable-sized-type-not-at-end' may have been intended to silence earlier diagnostics

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