Hi Zhou,

FYI, the error/warning still remains.

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 02951ceaa6d546dfa0f741f52f6d47e0fb0ac7b4 commit: d45b33b72c530e64219ad997947a33f6e07d339c [1341/1341] share pool: Try to compact when memory is insufficient config: arm64-randconfig-003-20241220 (https://download.01.org/0day-ci/archive/20241220/202412201754.UDg3QqQf-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241220/202412201754.UDg3QqQf-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/202412201754.UDg3QqQf-lkp@intel.com/

All errors (new ones prefixed by >>):

mm/share_pool.c: In function 'sp_compact_nodes':

...

mm/share_pool.c:1043:9: error: implicit declaration of function 'sysctl_compaction_handler'; did you mean 'sysctl_memcg_qos_handler'? [-Werror=implicit-function-declaration]

1043 | sysctl_compaction_handler(NULL, 1, NULL, NULL, NULL); | ^~~~~~~~~~~~~~~~~~~~~~~~~ | sysctl_memcg_qos_handler mm/share_pool.c: At top level: mm/share_pool.c:2482:12: warning: 'spa_stat_show' defined but not used [-Wunused-function] 2482 | static int spa_stat_show(struct seq_file *seq, void *offset) | ^~~~~~~~~~~~~ mm/share_pool.c:2363:12: warning: 'proc_stat_show' defined but not used [-Wunused-function] 2363 | static int proc_stat_show(struct seq_file *seq, void *offset) | ^~~~~~~~~~~~~~ In file included from mm/share_pool.c:22: In function 'memalloc_noreclaim_restore', inlined from 'sp_alloc' at mm/share_pool.c:1374:4: include/linux/sched/mm.h:278:58: warning: 'noreclaim_flag' may be used uninitialized [-Wmaybe-uninitialized] 278 | current->flags = (current->flags & ~PF_MEMALLOC) | flags; | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ mm/share_pool.c: In function 'sp_alloc': mm/share_pool.c:1238:22: note: 'noreclaim_flag' was declared here 1238 | unsigned int noreclaim_flag; | ^~~~~~~~~~~~~~ cc1: some warnings being treated as errors

vim +1043 mm/share_pool.c

1039 1040 static unsigned long last_jiffies; 1041 static void sp_compact_nodes(struct work_struct *work) 1042 {

1043 sysctl_compaction_handler(NULL, 1, NULL, NULL, NULL);

1044 1045 kfree(work); 1046 } 1047