[anolis-intel-cloud:devel-6.6 50/50] mm/unevictable.c:160:6: warning: no previous prototype for 'del_unevict_task'

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

tree:   https://gitee.com/anolis/intel-cloud-kernel.git devel-6.6
head:   7c285f40a964b427534f3dab33b104ee9cab6245
commit: b9a2e0d8ac85271df6a10641da7513f8e44611d8 [50/50] anolis: mm: unevictable: adjust three key functions
config: x86_64-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20251213/202512131500.AbdbOiSI-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251213/202512131500.AbdbOiSI-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/202512131500.AbdbOiSI-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/unevictable.c:160:6: warning: no previous prototype for 'del_unevict_task' [-Wmissing-prototypes]
     160 | void del_unevict_task(struct task_struct *tsk)
         |      ^~~~~~~~~~~~~~~~


vim +/del_unevict_task +160 mm/unevictable.c

   159	
 > 160	void del_unevict_task(struct task_struct *tsk)
   161	{
   162		struct evict_pid_entry *result;
   163	
   164		if (!tsk) {
   165			struct evict_pid_entry *pid_entry, *tmp;
   166	
   167			mutex_lock(&pid_mutex);
   168			list_for_each_entry_safe(pid_entry, tmp, &pid_list, list) {
   169				rcu_read_lock();
   170				tsk = find_task_by_pid_ns(pid_entry->rootpid,
   171						&init_pid_ns);
   172				rcu_read_unlock();
   173				if (!tsk) {
   174					list_del(&pid_entry->list);
   175					__remove_entry(pid_entry);
   176					kfree(pid_entry);
   177				}
   178			}
   179			mutex_unlock(&pid_mutex);
   180			return;
   181		}
   182	
   183		mutex_lock(&pid_mutex);
   184		result = lookup_unevict_entry(tsk);
   185		if (result) {
   186			list_del(&result->list);
   187			__remove_entry(result);
   188			mutex_unlock(&pid_mutex);
   189			__evict_pid(result);
   190			kfree(result);
   191		} else
   192			mutex_unlock(&pid_mutex);
   193	}
   194	

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