[openeuler:OLK-5.10 2579/2579] mm/share_pool.c:1215:12: warning: 'spa_stat_show' defined but not used

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

tree:   https://gitee.com/openeuler/kernel.git OLK-5.10
head:   ff5378fff024fcb2552e6da22811cf933fe4a4c0
commit: d83dcc99d770b53e4839791fa2319c953fc6e42d [2579/2579] share_pool: Add proc interfaces to show sp info
config: arm64-randconfig-004-20241213 (https://download.01.org/0day-ci/archive/20241213/202412130822.tSyyPsoM-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241213/202412130822.tSyyPsoM-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/202412130822.tSyyPsoM-lkp@intel.com/

All warnings (new ones prefixed by >>):

   mm/share_pool.c:877:6: warning: no previous prototype for 'sp_proc_stat_drop' [-Wmissing-prototypes]
     877 | void sp_proc_stat_drop(struct sp_proc_stat *stat)
         |      ^~~~~~~~~~~~~~~~~
   mm/share_pool.c:1108:6: warning: no previous prototype for 'spa_overview_show' [-Wmissing-prototypes]
    1108 | void spa_overview_show(struct seq_file *seq)
         |      ^~~~~~~~~~~~~~~~~
   mm/share_pool.c:1190:6: warning: no previous prototype for 'spg_overview_show' [-Wmissing-prototypes]
    1190 | void spg_overview_show(struct seq_file *seq)
         |      ^~~~~~~~~~~~~~~~~
   mm/share_pool.c:1322:12: warning: 'proc_overview_show' defined but not used [-Wunused-function]
    1322 | static int proc_overview_show(struct seq_file *seq, void *offset)
         |            ^~~~~~~~~~~~~~~~~~
   mm/share_pool.c:1279:12: warning: 'proc_stat_show' defined but not used [-Wunused-function]
    1279 | static int proc_stat_show(struct seq_file *seq, void *offset)
         |            ^~~~~~~~~~~~~~
>> mm/share_pool.c:1215:12: warning: 'spa_stat_show' defined but not used [-Wunused-function]
    1215 | static int spa_stat_show(struct seq_file *seq, void *offset)
         |            ^~~~~~~~~~~~~
   mm/share_pool.c:489:21: warning: 'spa_file' defined but not used [-Wunused-function]
     489 | static struct file *spa_file(struct sp_area *spa)
         |                     ^~~~~~~~
   mm/share_pool.c:484:22: warning: 'spa_size' defined but not used [-Wunused-function]
     484 | static unsigned long spa_size(struct sp_area *spa)
         |                      ^~~~~~~~
   mm/share_pool.c:408:13: warning: 'free_spg_stat' defined but not used [-Wunused-function]
     408 | static void free_spg_stat(int spg_id)
         |             ^~~~~~~~~~~~~
   mm/share_pool.c:385:12: warning: 'sp_init_spg_stat' defined but not used [-Wunused-function]
     385 | static int sp_init_spg_stat(struct sp_group *spg)
         |            ^~~~~~~~~~~~~~~~
   mm/share_pool.c:344:30: warning: 'sp_init_process_stat' defined but not used [-Wunused-function]
     344 | static struct spg_proc_stat *sp_init_process_stat(struct task_struct *tsk,
         |                              ^~~~~~~~~~~~~~~~~~~~
   mm/share_pool.c:266:13: warning: 'update_spg_proc_stat_k2u' defined but not used [-Wunused-function]
     266 | static void update_spg_proc_stat_k2u(unsigned long size, bool inc,
         |             ^~~~~~~~~~~~~~~~~~~~~~~~
   mm/share_pool.c:252:13: warning: 'update_spg_proc_stat_alloc' defined but not used [-Wunused-function]
     252 | static void update_spg_proc_stat_alloc(unsigned long size, bool inc,
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~~
   mm/share_pool.c:222:13: warning: 'update_spg_stat_k2u' defined but not used [-Wunused-function]
     222 | static void update_spg_stat_k2u(unsigned long size, bool inc,
         |             ^~~~~~~~~~~~~~~~~~~
   mm/share_pool.c:200:13: warning: 'update_spg_stat_alloc' defined but not used [-Wunused-function]
     200 | static void update_spg_stat_alloc(unsigned long size, bool inc,
         |             ^~~~~~~~~~~~~~~~~~~~~
   In file included from mm/share_pool.c:27:
   mm/share_pool.c:104:19: warning: 'sp_group_id_ida' defined but not used [-Wunused-variable]
     104 | static DEFINE_IDA(sp_group_id_ida);
         |                   ^~~~~~~~~~~~~~~
   include/linux/idr.h:253:44: note: in definition of macro 'DEFINE_IDA'
     253 | #define DEFINE_IDA(name)        struct ida name = IDA_INIT(name)
         |                                            ^~~~
   mm/share_pool.c:98:19: warning: 'sp_group_idr' defined but not used [-Wunused-variable]
      98 | static DEFINE_IDR(sp_group_idr);
         |                   ^~~~~~~~~~~~
   include/linux/idr.h:56:44: note: in definition of macro 'DEFINE_IDR'
      56 | #define DEFINE_IDR(name)        struct idr name = IDR_INIT(name)
         |                                            ^~~~
   mm/share_pool.c:81:18: warning: 'mdc_default_group_id' defined but not used [-Wunused-const-variable=]
      81 | static const int mdc_default_group_id = 1;
         |                  ^~~~~~~~~~~~~~~~~~~~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for PGP_KEY_PARSER
   Depends on [n]: CRYPTO [=y] && ASYMMETRIC_KEY_TYPE [=y] && ASYMMETRIC_PUBLIC_KEY_SUBTYPE [=n]
   Selected by [y]:
   - PGP_PRELOAD [=y] && CRYPTO [=y] && ASYMMETRIC_KEY_TYPE [=y]


vim +/spa_stat_show +1215 mm/share_pool.c

  1214	
> 1215	static int spa_stat_show(struct seq_file *seq, void *offset)
  1216	{
  1217		spg_overview_show(seq);
  1218		spa_overview_show(seq);
  1219		/* print the file header */
  1220		seq_printf(seq, "%-10s %-16s %-16s %-10s %-7s %-5s %-8s %-8s\n",
  1221			   "Group ID", "va_start", "va_end", "Size(KB)", "Type", "Huge", "PID", "Ref");
  1222		rb_spa_stat_show(seq);
  1223		return 0;
  1224	}
  1225	

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