[openeuler:OLK-6.6 1667/1667] mm/page_cache_limit.c:35:5: sparse: sparse: symbol 'cache_reclaim_enable_handler' was not declared. Should it be static?

[openeuler:OLK-6.6 1667/1667] mm/page_cache_limit.c:35:5: sparse: sparse: symbol 'cache_reclaim_enable_handler' was not declared. Should it be static?

[kernel test robot]

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   16a0cbac6609f8ba10a91a9d52b15bf28243c3ee
commit: 621647ce254f1d347ae9bc3d328c09cbb2732487 [1667/1667] mm: support periodical memory reclaim
config: loongarch-randconfig-r121-20241227 (https://download.01.org/0day-ci/archive/20241227/202412270644.ScfyxcPp-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 14.2.0
reproduce: (https://download.01.org/0day-ci/archive/20241227/202412270644.ScfyxcPp-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/202412270644.ScfyxcPp-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> mm/page_cache_limit.c:35:5: sparse: sparse: symbol 'cache_reclaim_enable_handler' was not declared. Should it be static?
>> mm/page_cache_limit.c:51:5: sparse: sparse: symbol 'cache_reclaim_sysctl_handler' was not declared. Should it be static?

vim +/cache_reclaim_enable_handler +35 mm/page_cache_limit.c

    34	
  > 35	int cache_reclaim_enable_handler(struct ctl_table *table, int write,
    36				void *buffer, size_t *length, loff_t *ppos)
    37	{
    38		int ret;
    39	
    40		ret = proc_dointvec_minmax(table, write, buffer, length, ppos);
    41		if (ret || !write)
    42			return ret;
    43	
    44		if (should_periodical_reclaim())
    45			schedule_delayed_work(&shepherd, round_jiffies_relative(
    46				(unsigned long)vm_cache_reclaim_s * HZ));
    47	
    48		return 0;
    49	}
    50	
  > 51	int cache_reclaim_sysctl_handler(struct ctl_table *table, int write,
    52			void *buffer, size_t *length, loff_t *ppos)
    53	{
    54		int ret;
    55	
    56		ret = proc_dointvec_minmax(table, write, buffer, length, ppos);
    57		if (ret || !write)
    58			return ret;
    59	
    60		if (should_periodical_reclaim())
    61			mod_delayed_work(system_unbound_wq, &shepherd,
    62					round_jiffies_relative(
    63					(unsigned long)vm_cache_reclaim_s * HZ));
    64	
    65		return ret;
    66	}
    67	

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