Hi Tang, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 02951ceaa6d546dfa0f741f52f6d47e0fb0ac7b4 commit: 1cfc25ccec44c17c19c892bd31d00d8f6fb23f9b [1341/1341] share_pool: Add proc node to show process overview info config: arm64-randconfig-003-20241220 (https://download.01.org/0day-ci/archive/20241220/202412201919.863TCPHL-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241220/202412201919.863TCPHL-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/202412201919.863TCPHL-lkp@intel.com/ All warnings (new ones prefixed by >>): mm/share_pool.c: In function 'sp_group_id_by_pid': mm/share_pool.c:840:29: warning: ordered comparison of pointer with integer zero [-Wextra] 840 | if (!spg_ids || num <= 0) | ^~ mm/share_pool.c: In function 'sp_compact_nodes': mm/share_pool.c:1689:9: error: implicit declaration of function 'sysctl_compaction_handler'; did you mean 'sysctl_memcg_qos_handler'? [-Werror=implicit-function-declaration] 1689 | sysctl_compaction_handler(NULL, 1, NULL, NULL, NULL); | ^~~~~~~~~~~~~~~~~~~~~~~~~ | sysctl_memcg_qos_handler mm/share_pool.c: At top level:

...

mm/share_pool.c:3736:12: warning: 'proc_overview_show' defined but not used [-Wunused-function] 3736 | static int proc_overview_show(struct seq_file *seq, void *offset) | ^~~~~~~~~~~~~~~~~~ mm/share_pool.c:3693:12: warning: 'proc_stat_show' defined but not used [-Wunused-function] 3693 | static int proc_stat_show(struct seq_file *seq, void *offset) | ^~~~~~~~~~~~~~ mm/share_pool.c:3635:12: warning: 'spa_stat_show' defined but not used [-Wunused-function] 3635 | static int spa_stat_show(struct seq_file *seq, void *offset) | ^~~~~~~~~~~~~ cc1: some warnings being treated as errors

vim +/proc_overview_show +3736 mm/share_pool.c 3735

3736 static int proc_overview_show(struct seq_file *seq, void *offset) 3737 { 3738 seq_printf(seq, "%-8s %-16s %-9s %-9s %-9s %-10s %-10s %-8s\n", 3739 "PID", "COMM", "SP_ALLOC", "SP_K2U", "SP_RES", "Non-SP_RES", 3740 "Non-SP_Shm", "VIRT"); 3741 3742 down_read(&sp_proc_stat_sem); 3743 idr_for_each(&sp_proc_stat_idr, idr_proc_overview_cb, seq); 3744 up_read(&sp_proc_stat_sem); 3745 return 0; 3746 } 3747

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