Hi Chen, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 22c50245e8025b0c6beee13d0df238987b98e6f8 commit: 6943b93b464351cbc35aa002e86bac48e08b1c3f [19033/23866] mm: add support for limiting the usage of reliable memory in pagecache config: arm64-randconfig-001-20241027 (https://download.01.org/0day-ci/archive/20241027/202410271040.2DFjHIvY-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241027/202410271040.2DFjHIvY-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/202410271040.2DFjHIvY-lkp@intel.com/ All warnings (new ones prefixed by >>): mm/mem_reliable.c:42:22: warning: 'reliable_pagecache_max_bytes' defined but not used [-Wunused-variable] 42 | static unsigned long reliable_pagecache_max_bytes = ULONG_MAX; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

...

mm/mem_reliable.c:41:22: warning: 'zero' defined but not used [-Wunused-variable] 41 | static unsigned long zero; | ^~~~

vim +/zero +41 mm/mem_reliable.c 40

41 static unsigned long zero; 42 static unsigned long reliable_pagecache_max_bytes = ULONG_MAX; 43

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