[norov:cpumask_next_wrap5 1/13] include/linux/objpool.h:173:6: error: variable 'start' set but not used

[norov:cpumask_next_wrap5 1/13] include/linux/objpool.h:173:6: error: variable 'start' set but not used

[kernel test robot]

tree:   https://github.com/norov/linux cpumask_next_wrap5
head:   d2ce21c762c90540ac4114fe274ffa7bb0627c4c
commit: baca98459e3b3f1c64f4d61deba92fa15a0a1c91 [1/13] objpool: rework objpool_pop()
config: i386-buildonly-randconfig-005-20241016 (https://download.01.org/0day-ci/archive/20241016/202410160948.7SEfTmD4-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241016/202410160948.7SEfTmD4-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/202410160948.7SEfTmD4-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/gpu/drm/drm_debugfs_crc.c:35:
   In file included from include/drm/drm_crtc.h:32:
   In file included from include/drm/drm_modes.h:33:
   In file included from include/drm/drm_connector.h:32:
   In file included from include/drm/drm_util.h:36:
   In file included from include/linux/kgdb.h:19:
   In file included from include/linux/kprobes.h:29:
>> include/linux/objpool.h:173:6: error: variable 'start' set but not used [-Werror,-Wunused-but-set-variable]
     173 |         int start, cpu;
         |             ^
   1 error generated.


vim +/start +173 include/linux/objpool.h

   162	
   163	/**
   164	 * objpool_pop() - allocate an object from objpool
   165	 * @pool: object pool
   166	 *
   167	 * return value: object ptr or NULL if failed
   168	 */
   169	static inline void *objpool_pop(struct objpool_head *pool)
   170	{
   171		void *obj = NULL;
   172		unsigned long flags;
 > 173		int start, cpu;
   174	
   175		/* disable local irq to avoid preemption & interruption */
   176		raw_local_irq_save(flags);
   177	
   178		start = raw_smp_processor_id();
   179		for_each_possible_cpu_wrap(cpu, start) {
   180			obj = __objpool_try_get_slot(pool, cpu);
   181			if (obj)
   182				break;
   183		}
   184		raw_local_irq_restore(flags);
   185	
   186		return obj;
   187	}
   188	

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