[openeuler:OLK-6.6 2909/2909] mm/mem_reliable.c:345:2: error: call to undeclared function 'mem_reliable_ctrl_bit_disable'; ISO C99 and later do not support implicit function declarations

[openeuler:OLK-6.6 2909/2909] mm/mem_reliable.c:345:2: error: call to undeclared function 'mem_reliable_ctrl_bit_disable'; ISO C99 and later do not support implicit function declarations

[kernel test robot]

Hi Ma,

FYI, the error/warning still remains.

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   a159deb279dfe156316d8c3957dc7f253686ff83
commit: 425771499c0742a996ab28df143d7a5123102686 [2909/2909] mm: mem_reliable: Introduce proc interface to disable memory reliable features
config: arm64-randconfig-r121-20250923 (https://download.01.org/0day-ci/archive/20250923/202509230718.hDzgcLLM-lkp@intel.com/config)
compiler: clang version 16.0.6 (https://github.com/llvm/llvm-project 7cbf1a2591520c2491aa35339f227775f4d3adf6)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250923/202509230718.hDzgcLLM-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/202509230718.hDzgcLLM-lkp@intel.com/

All errors (new ones prefixed by >>):

>> mm/mem_reliable.c:345:2: error: call to undeclared function 'mem_reliable_ctrl_bit_disable'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           mem_reliable_ctrl_bit_disable(idx);
           ^
   mm/mem_reliable.c:345:2: note: did you mean 'mem_reliable_ctrl_bit_disabled'?
   mm/mem_reliable.c:320:13: note: 'mem_reliable_ctrl_bit_disabled' declared here
   static void mem_reliable_ctrl_bit_disabled(int idx) {}
               ^
   1 error generated.


vim +/mem_reliable_ctrl_bit_disable +345 mm/mem_reliable.c

   322	
   323	static void mem_reliable_feature_disable(int idx)
   324	{
   325		char *str = NULL;
   326	
   327		switch (idx) {
   328		case MEM_RELIABLE_FALLBACK:
   329			reliable_allow_fallback = false;
   330			str = "fallback";
   331			break;
   332		case MEM_RELIABLE_SHMEM:
   333			shmem_reliable = false;
   334			str = "shmem";
   335			break;
   336		case MEM_RELIABLE_PAGECACHE:
   337			pagecache_reliable = false;
   338			str = "pagecache";
   339			break;
   340		default:
   341			pr_err("unknown index: %d", idx);
   342			return;
   343		}
   344	
 > 345		mem_reliable_ctrl_bit_disable(idx);
   346		pr_info("%s is disabled\n", str);
   347	}
   348	

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