[openeuler:openEuler-1.0-LTS 1420/1420] mm/mem_reliable.c:272:5: sparse: sparse: symbol 'reliable_debug_handler' was not declared. Should it be static?

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

tree:   https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS
head:   cc7cb040bd0afe96f1da94c9f21eda5a986510a5
commit: 851a3ff0b4de68403c9a344c3d5378aa590705b7 [1420/1420] mm: Introduce proc interface to control memory reliable features
config: arm64-randconfig-r131-20250208 (https://download.01.org/0day-ci/archive/20250209/202502092003.Ptadb8Sw-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.2.0
reproduce: (https://download.01.org/0day-ci/archive/20250209/202502092003.Ptadb8Sw-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/202502092003.Ptadb8Sw-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   mm/mem_reliable.c:52:14: sparse: sparse: restricted gfp_t degrades to integer
   mm/mem_reliable.c:199:5: sparse: sparse: symbol 'reliable_limit_handler' was not declared. Should it be static?
>> mm/mem_reliable.c:272:5: sparse: sparse: symbol 'reliable_debug_handler' was not declared. Should it be static?
   mm/mem_reliable.c:199:5: warning: no previous prototype for 'reliable_limit_handler' [-Wmissing-prototypes]
     199 | int reliable_limit_handler(struct ctl_table *table, int write,
         |     ^~~~~~~~~~~~~~~~~~~~~~
   mm/mem_reliable.c:272:5: warning: no previous prototype for 'reliable_debug_handler' [-Wmissing-prototypes]
     272 | int reliable_debug_handler(struct ctl_table *table, int write,
         |     ^~~~~~~~~~~~~~~~~~~~~~

vim +/reliable_debug_handler +272 mm/mem_reliable.c

   271	
 > 272	int reliable_debug_handler(struct ctl_table *table, int write,
   273		void __user *buffer, size_t *length, loff_t *ppos)
   274	{
   275		unsigned long old_ctrl_bits, new_ctrl_bits;
   276		static DEFINE_MUTEX(reliable_debug_mutex);
   277		int ret;
   278	
   279		mutex_lock(&reliable_debug_mutex);
   280		old_ctrl_bits = mem_reliable_ctrl_bits;
   281		ret = proc_doulongvec_minmax(table, write, buffer, length, ppos);
   282		if (ret == 0 && write) {
   283			if (mem_reliable_ctrl_bits > (1 << CTRL_BITS_SHIFT) - 1) {
   284				mem_reliable_ctrl_bits = old_ctrl_bits;
   285				mutex_unlock(&reliable_debug_mutex);
   286	
   287				return -EINVAL;
   288			}
   289	
   290			new_ctrl_bits = mem_reliable_ctrl_bits;
   291			mem_reliable_ctrl_bits = old_ctrl_bits;
   292			if (!!test_bit(MEM_RELIABLE_ALL, &new_ctrl_bits))
   293				mem_reliable_parse_ctrl_bits(new_ctrl_bits);
   294			else
   295				mem_reliable_disable_all();
   296		}
   297	
   298		mutex_unlock(&reliable_debug_mutex);
   299	
   300		return ret;
   301	}
   302	

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