[openeuler:openEuler-1.0-LTS 1719/1719] block/blk-io-hierarchy/debugfs.c:63:2: error: implicit declaration of function 'hierarchy_show_slow_io'

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

Hi Yu,

FYI, the error/warning still remains.

tree:   https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS
head:   e6b6811414fe4cfc995369e8bda32fc1b4ee1d51
commit: b2f723aef027af0f194ff0c9f53f8ae6a7cb7de3 [1719/1719] blk-io-hierarchy: support to recored the number of slow IO
config: x86_64-randconfig-101-20250706 (https://download.01.org/0day-ci/archive/20250706/202507061031.GhTBMLAx-lkp@intel.com/config)
compiler: clang version 20.1.7 (https://github.com/llvm/llvm-project 6146a88f60492b520a36f8f8f3231e15f3cc6082)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250706/202507061031.GhTBMLAx-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/202507061031.GhTBMLAx-lkp@intel.com/

All errors (new ones prefixed by >>):

>> block/blk-io-hierarchy/debugfs.c:63:2: error: implicit declaration of function 'hierarchy_show_slow_io' [-Werror,-Wimplicit-function-declaration]
      63 |         hierarchy_show_slow_io(hstats_data, m);
         |         ^
   block/blk-io-hierarchy/debugfs.c:63:2: note: did you mean 'hierarchy_account_slow_io'?
   block/blk-io-hierarchy/iodump.h:85:1: note: 'hierarchy_account_slow_io' declared here
      85 | hierarchy_account_slow_io(struct hierarchy_stage *hstage,
         | ^
   1 error generated.


vim +/hierarchy_show_slow_io +63 block/blk-io-hierarchy/debugfs.c

    28	
    29	static int __hierarchy_stats_show(struct hierarchy_stats_data *hstats_data,
    30					  struct seq_file *m, enum stage_group stage)
    31	{
    32		u64 dispatched[NR_NEW_STAT_GROUPS] = {0};
    33		u64 completed[NR_NEW_STAT_GROUPS] = {0};
    34		u64 latency[NR_NEW_STAT_GROUPS] = {0};
    35		int cpu;
    36		int i;
    37	
    38		for_each_possible_cpu(cpu) {
    39			struct hierarchy_stats *stat =
    40				per_cpu_ptr(hstats_data->hstats, cpu);
    41	
    42			for (i = 0; i < NR_NEW_STAT_GROUPS; ++i) {
    43				dispatched[i] += stat->dispatched[i];
    44				completed[i] += stat->completed[i];
    45				latency[i] += stage_is_rq(stage) ?
    46					      stat->jiffies[i] : stat->nsecs[i];
    47			}
    48		}
    49	
    50		if (stage_is_rq(stage))
    51			for (i = 0; i < NR_NEW_STAT_GROUPS; ++i)
    52				latency[i] =
    53					jiffies_to_msecs(latency[i]) * NSEC_PER_MSEC;
    54	
    55		seq_printf(m, "%llu %llu %llu %llu %llu %llu %llu %llu %llu %llu %llu %llu",
    56			   dispatched[STAT_READ], completed[STAT_READ],
    57			   latency[STAT_READ], dispatched[STAT_WRITE],
    58			   completed[STAT_WRITE], latency[STAT_WRITE],
    59			   dispatched[STAT_DISCARD], completed[STAT_DISCARD],
    60			   latency[STAT_DISCARD], dispatched[STAT_FLUSH],
    61			   completed[STAT_FLUSH], latency[STAT_FLUSH]);
    62	
  > 63		hierarchy_show_slow_io(hstats_data, m);
    64		seq_putc(m, '\n');
    65		return 0;
    66	}
    67	

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