[openeuler:OLK-6.6 1924/1924] mm/oom_kill.c:316: warning: Function parameter or member 'task' not described in 'oom_next_task'

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

Hi Jing,

FYI, the error/warning still remains.

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   254b433462607f511039b75693d9314822538f20
commit: be8d95530886b0aaa5a59b5c43a285667c9eebc6 [1924/1924] memcg: support priority for oom
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20250214/202502142019.HSCMUy5Y-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250214/202502142019.HSCMUy5Y-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/202502142019.HSCMUy5Y-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/oom_kill.c:316: warning: Function parameter or member 'task' not described in 'oom_next_task'
>> mm/oom_kill.c:316: warning: Function parameter or member 'oc' not described in 'oom_next_task'
>> mm/oom_kill.c:316: warning: Function parameter or member 'points' not described in 'oom_next_task'
>> mm/oom_kill.c:316: warning: expecting prototype for We choose the task in low(). Prototype was for oom_next_task() instead


vim +316 mm/oom_kill.c

   308	
   309	#ifdef CONFIG_MEMCG_OOM_PRIORITY
   310	/**
   311	 * We choose the task in low-priority memcg firstly. For the same state, we
   312	 * choose the task with the highest number of 'points'.
   313	 */
   314	static bool oom_next_task(struct task_struct *task, struct oom_control *oc,
   315				long points)
 > 316	{
   317		struct mem_cgroup *cur_memcg;
   318		struct mem_cgroup *oc_memcg;
   319		int cur_memcg_prio, oc_memcg_prio;
   320	
   321		if (points == LONG_MIN)
   322			return true;
   323	
   324		if (!oc->chosen)
   325			return false;
   326	
   327		rcu_read_lock();
   328		oc_memcg = mem_cgroup_from_task(oc->chosen);
   329		cur_memcg = mem_cgroup_from_task(task);
   330		oc_memcg_prio = READ_ONCE(oc_memcg->oom_prio);
   331		cur_memcg_prio = READ_ONCE(cur_memcg->oom_prio);
   332		rcu_read_unlock();
   333	
   334		if (cur_memcg_prio == oc_memcg_prio)
   335			return points < oc->chosen_points;
   336	
   337		/* if oc is low-priority, so skip the task */
   338		if (oc_memcg_prio == MEMCG_LOW_OOM_PRIORITY)
   339			return true;
   340	
   341		return false;
   342	}
   343	#else
   344	static inline bool oom_next_task(struct task_struct *task,
   345					struct oom_control *oc, long points)
   346	{
   347		return points == LONG_MIN || points < oc->chosen_points;
   348	}
   349	#endif
   350	

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