[openeuler:OLK-6.6 1369/14216] mm/share_pool.c:3305:12: warning: 'proc_usage_show' defined but not used

[kernel test robot <lkp@intel.com>]

Hi Wang,

FYI, the error/warning still remains.

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   c9fe32fed709da98069e8215f6ecf39ea63f5355
commit: df165ba49e6e4ce8b4f6076aded3b92e19918b03 [1369/14216] mm/sharepool: Add proc interfaces to show sp info
config: arm64-randconfig-002-20240928 (https://download.01.org/0day-ci/archive/20240928/202409280347.fIsKo3PM-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240928/202409280347.fIsKo3PM-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/202409280347.fIsKo3PM-lkp@intel.com/

All warnings (new ones prefixed by >>):

   mm/share_pool.c: In function 'sp_unshare_kva':
   mm/share_pool.c:2796:14: warning: variable 'is_hugepage' set but not used [-Wunused-but-set-variable]
    2796 |         bool is_hugepage = true;
         |              ^~~~~~~~~~~
   mm/share_pool.c: At top level:
>> mm/share_pool.c:3305:12: warning: 'proc_usage_show' defined but not used [-Wunused-function]
    3305 | static int proc_usage_show(struct seq_file *seq, void *offset)
         |            ^~~~~~~~~~~~~~~
>> mm/share_pool.c:3285:12: warning: 'proc_group_usage_show' defined but not used [-Wunused-function]
    3285 | static int proc_group_usage_show(struct seq_file *seq, void *offset)
         |            ^~~~~~~~~~~~~~~~~~~~~
   mm/share_pool.c:3234:12: warning: 'spa_stat_show' defined but not used [-Wunused-function]
    3234 | static int spa_stat_show(struct seq_file *seq, void *offset)
         |            ^~~~~~~~~~~~~


vim +/proc_usage_show +3305 mm/share_pool.c

  3284	
> 3285	static int proc_group_usage_show(struct seq_file *seq, void *offset)
  3286	{
  3287		if (!should_show_statistics())
  3288			return -EPERM;
  3289	
  3290		spg_overview_show(seq);
  3291		spa_overview_show(seq);
  3292	
  3293		/* print the file header */
  3294		seq_printf(seq, "%-8s %-8s %-9s %-9s %-9s %-8s %-7s %-7s %-4s\n",
  3295				"PID", "Group_ID", "SP_ALLOC", "SP_K2U", "SP_RES",
  3296				"VIRT", "RES", "Shm", "PROT");
  3297	
  3298		down_read(&sp_global_sem);
  3299		idr_for_each(&sp_group_idr, proc_usage_by_group, seq);
  3300		up_read(&sp_global_sem);
  3301	
  3302		return 0;
  3303	}
  3304	
> 3305	static int proc_usage_show(struct seq_file *seq, void *offset)
  3306	{
  3307		struct sp_group_master *master = NULL;
  3308		unsigned long anon, file, shmem, total_rss;
  3309		long sp_res, sp_res_nsize, non_sp_res, non_sp_shm;
  3310		struct sp_meminfo *meminfo;
  3311	
  3312		if (!should_show_statistics())
  3313			return -EPERM;
  3314	
  3315		seq_printf(seq, "%-8s %-16s %-9s %-9s %-9s %-10s %-10s %-8s\n",
  3316				"PID", "COMM", "SP_ALLOC", "SP_K2U", "SP_RES", "Non-SP_RES",
  3317				"Non-SP_Shm", "VIRT");
  3318	
  3319		down_read(&sp_global_sem);
  3320		mutex_lock(&master_list_lock);
  3321		list_for_each_entry(master, &master_list, list_node) {
  3322			meminfo = &master->meminfo;
  3323			get_mm_rss_info(master->mm, &anon, &file, &shmem, &total_rss);
  3324			get_process_sp_res(master, &sp_res, &sp_res_nsize);
  3325			get_process_non_sp_res(total_rss, shmem, sp_res_nsize,
  3326					&non_sp_res, &non_sp_shm);
  3327			seq_printf(seq, "%-8d %-16s %-9ld %-9ld %-9ld %-10ld %-10ld %-8ld\n",
  3328					master->tgid, master->comm,
  3329					meminfo_alloc_sum_byKB(meminfo),
  3330					meminfo_k2u_size(meminfo),
  3331					sp_res, non_sp_res, non_sp_shm,
  3332					page2kb(master->mm->total_vm));
  3333		}
  3334		mutex_unlock(&master_list_lock);
  3335		up_read(&sp_global_sem);
  3336	
  3337		return 0;
  3338	}
  3339	

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