[koverstreet-bcachefs:time_stats_sched 63/63] csky-linux-ld: time_stats.c:undefined reference to `mean_and_variance_weighted_update'

[koverstreet-bcachefs:time_stats_sched 63/63] csky-linux-ld: time_stats.c:undefined reference to `mean_and_variance_weighted_update'

[kernel test robot]

tree:   https://github.com/koverstreet/bcachefs time_stats_sched
head:   d9b1e57f3b38d16fdd7177f3b9636dcbb4c749ed
commit: d9b1e57f3b38d16fdd7177f3b9636dcbb4c749ed [63/63] sched_wakeup_backtrace debugfs
config: csky-randconfig-001-20250209 (https://download.01.org/0day-ci/archive/20250209/202502090655.4OnTu1Jl-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250209/202502090655.4OnTu1Jl-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/202502090655.4OnTu1Jl-lkp@intel.com/

All errors (new ones prefixed by >>):

   csky-linux-ld: kernel/sched/core.o: in function `try_to_wake_up':
   core.c:(.text+0x15c6): undefined reference to `__generic_xchg_called_with_bad_pointer'
   csky-linux-ld: core.c:(.text+0x16b8): undefined reference to `__generic_xchg_called_with_bad_pointer'
   csky-linux-ld: kernel/sched/timestats_bt.o: in function `sched_wakeups_open':
   timestats_bt.c:(.text+0xfc): undefined reference to `debugfs_sched'
   csky-linux-ld: lib/time_stats.o: in function `__time_stats_clear_buffer':
   time_stats.c:(.text+0x2fe): undefined reference to `mean_and_variance_weighted_update'
>> csky-linux-ld: time_stats.c:(.text+0x39c): undefined reference to `mean_and_variance_weighted_update'
   csky-linux-ld: time_stats.c:(.text+0x6aa): undefined reference to `mean_and_variance_weighted_update'
   csky-linux-ld: lib/time_stats.o: in function `time_stats_clear_buffer':
   time_stats.c:(.text+0x764): undefined reference to `mean_and_variance_weighted_update'
   csky-linux-ld: lib/time_stats.o: in function `time_stats_update_one':
   time_stats.c:(.text+0x91e): undefined reference to `mean_and_variance_weighted_update'
   csky-linux-ld: lib/time_stats.o:time_stats.c:(.text+0x9a8): more undefined references to `mean_and_variance_weighted_update' follow
   csky-linux-ld: lib/time_stats.o: in function `__time_stats_update':
>> time_stats.c:(.text+0xd0a): undefined reference to `mean_and_variance_weighted_get_mean'
>> csky-linux-ld: time_stats.c:(.text+0xd70): undefined reference to `mean_and_variance_weighted_get_mean'
   csky-linux-ld: lib/time_stats.o: in function `time_stats_to_json':
   time_stats.c:(.text+0xe58): undefined reference to `mean_and_variance_weighted_get_mean'
>> csky-linux-ld: time_stats.c:(.text+0xe74): undefined reference to `mean_and_variance_weighted_get_stddev'
   csky-linux-ld: time_stats.c:(.text+0xefc): undefined reference to `mean_and_variance_weighted_get_mean'
   csky-linux-ld: time_stats.c:(.text+0xf18): undefined reference to `mean_and_variance_weighted_get_stddev'
   csky-linux-ld: time_stats.c:(.text+0xf98): undefined reference to `mean_and_variance_weighted_get_mean'
   csky-linux-ld: time_stats.c:(.text+0xf9c): undefined reference to `mean_and_variance_weighted_get_stddev'
>> csky-linux-ld: time_stats.c:(.text+0x10ae): undefined reference to `mean_and_variance_get_mean'
>> csky-linux-ld: time_stats.c:(.text+0x10d8): undefined reference to `mean_and_variance_get_stddev'
   csky-linux-ld: time_stats.c:(.text+0x10fa): undefined reference to `mean_and_variance_get_mean'
   csky-linux-ld: time_stats.c:(.text+0x111a): undefined reference to `mean_and_variance_get_stddev'
   csky-linux-ld: time_stats.c:(.text+0x1148): undefined reference to `mean_and_variance_get_mean'
   csky-linux-ld: time_stats.c:(.text+0x114c): undefined reference to `mean_and_variance_get_stddev'
   csky-linux-ld: lib/time_stats.o: in function `time_stats_to_seq_buf':
   time_stats.c:(.text+0x128c): undefined reference to `mean_and_variance_weighted_get_mean'
   csky-linux-ld: time_stats.c:(.text+0x12ca): undefined reference to `mean_and_variance_weighted_get_stddev'
   csky-linux-ld: time_stats.c:(.text+0x134a): undefined reference to `mean_and_variance_weighted_get_mean'
   csky-linux-ld: time_stats.c:(.text+0x1386): undefined reference to `mean_and_variance_weighted_get_stddev'
   csky-linux-ld: time_stats.c:(.text+0x13e8): undefined reference to `mean_and_variance_weighted_get_mean'
   csky-linux-ld: time_stats.c:(.text+0x13f0): undefined reference to `mean_and_variance_weighted_get_stddev'
   csky-linux-ld: time_stats.c:(.text+0x1590): undefined reference to `mean_and_variance_get_mean'
   csky-linux-ld: time_stats.c:(.text+0x15c0): undefined reference to `mean_and_variance_get_stddev'
   csky-linux-ld: time_stats.c:(.text+0x15ee): undefined reference to `mean_and_variance_get_mean'
   csky-linux-ld: time_stats.c:(.text+0x161e): undefined reference to `mean_and_variance_get_stddev'
   csky-linux-ld: lib/time_stats.o: in function `time_stats_reset':
>> time_stats.c:(.text+0x1678): undefined reference to `mean_and_variance_get_mean'
   csky-linux-ld: time_stats.c:(.text+0x167c): undefined reference to `mean_and_variance_get_stddev'

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