Hi Ma, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 88ee450e4bfbe03d27189e9a1a794f610ad57ae5 commit: 425771499c0742a996ab28df143d7a5123102686 [1833/1833] mm: mem_reliable: Introduce proc interface to disable memory reliable features config: arm64-randconfig-r061-20250121 (https://download.01.org/0day-ci/archive/20250121/202501210717.sGx6dRjf-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250121/202501210717.sGx6dRjf-lkp@i...) 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/202501210717.sGx6dRjf-lkp@intel.com/ All errors (new ones prefixed by >>): mm/mem_reliable.c: In function 'mem_reliable_feature_disable':

...

mm/mem_reliable.c:345:9: error: implicit declaration of function 'mem_reliable_ctrl_bit_disable'; did you mean 'mem_reliable_ctrl_bit_disabled'? [-Wimplicit-function-declaration] 345 | mem_reliable_ctrl_bit_disable(idx); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | mem_reliable_ctrl_bit_disabled mm/mem_reliable.c: At top level: mm/mem_reliable.c:320:13: warning: 'mem_reliable_ctrl_bit_disabled' defined but not used [-Wunused-function] 320 | static void mem_reliable_ctrl_bit_disabled(int idx) {} | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +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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