[linux-next:master 1465/2825] tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c:557:13: warning: variable 'r' set but not used

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   596764183be8ebb13352b281a442a1f1151c9b06
commit: 0253e0590e2dc46996534371d56b5297099aed4e [1465/2825] selftests/bpf: test case for register_bpf_struct_ops().
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240130/202401300557.z5vzn8FM-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/202401300557.z5vzn8FM-lkp@intel.com/

All warnings (new ones prefixed by >>):

   tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c: In function 'bpf_dummy_reg':
>> tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c:557:13: warning: variable 'r' set but not used [-Wunused-but-set-variable]
     557 |         int r;
         |             ^


vim +/r +557 tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c

   553	
   554	static int bpf_dummy_reg(void *kdata)
   555	{
   556		struct bpf_testmod_ops *ops = kdata;
 > 557		int r;
   558	
   559		r = ops->test_2(4, 3);
   560	
   561		return 0;
   562	}
   563	

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