[anolis-intel-cloud:devel-5.10 19/19] mm/unevictable.c:156:6: warning: no previous prototype for 'del_unevict_task'

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

tree:   https://gitee.com/anolis/intel-cloud-kernel.git devel-5.10
head:   4bad2cd1902185593ae2d7cdf67ac43d5aa2dfe9
commit: bba8483e73c9dae0b5c67f8143dc8f922a07580b [19/19] anolis: mm: unevictable: adjust three key functions
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20250425/202504251037.Ei4ihIzR-lkp@intel.com/config)
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/20250425/202504251037.Ei4ihIzR-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/202504251037.Ei4ihIzR-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/unevictable.c:156:6: warning: no previous prototype for 'del_unevict_task' [-Wmissing-prototypes]
     156 | void del_unevict_task(struct task_struct *tsk)
         |      ^~~~~~~~~~~~~~~~
   mm/unevictable.c:537:1: warning: 'static' is not at beginning of declaration [-Wold-style-declaration]
     537 | const static struct proc_ops add_proc_fops = {
         | ^~~~~
   mm/unevictable.c:545:1: warning: 'static' is not at beginning of declaration [-Wold-style-declaration]
     545 | const static struct proc_ops del_proc_fops = {
         | ^~~~~
   mm/unevictable.c:545:30: warning: 'del_proc_fops' defined but not used [-Wunused-const-variable=]
     545 | const static struct proc_ops del_proc_fops = {
         |                              ^~~~~~~~~~~~~
   mm/unevictable.c:537:30: warning: 'add_proc_fops' defined but not used [-Wunused-const-variable=]
     537 | const static struct proc_ops add_proc_fops = {
         |                              ^~~~~~~~~~~~~


vim +/del_unevict_task +156 mm/unevictable.c

   155	
 > 156	void del_unevict_task(struct task_struct *tsk)
   157	{
   158		struct evict_pid_entry *result;
   159	
   160		if (!tsk) {
   161			struct evict_pid_entry *pid_entry, *tmp;
   162	
   163			mutex_lock(&pid_mutex);
   164			list_for_each_entry_safe(pid_entry, tmp, &pid_list, list) {
   165				rcu_read_lock();
   166				tsk = find_task_by_pid_ns(pid_entry->rootpid,
   167						&init_pid_ns);
   168				rcu_read_unlock();
   169				if (!tsk) {
   170					list_del(&pid_entry->list);
   171					__remove_entry(pid_entry);
   172					kfree(pid_entry);
   173				}
   174			}
   175			mutex_unlock(&pid_mutex);
   176			return;
   177		}
   178	
   179		mutex_lock(&pid_mutex);
   180		result = lookup_unevict_entry(tsk);
   181		if (result) {
   182			list_del(&result->list);
   183			__remove_entry(result);
   184			mutex_unlock(&pid_mutex);
   185			__evict_pid(result);
   186			kfree(result);
   187		} else
   188			mutex_unlock(&pid_mutex);
   189	}
   190	

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