[koverstreet-bcachefs:latency_debug 84/85] /usr/bin/ld: kernel/sched/timestats_bt.c:196: undefined reference to `debugfs_sched'

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

tree:   https://github.com/koverstreet/bcachefs latency_debug
head:   cca62acccd9672466b5ac130434dff2445c0a082
commit: 060b31c10f7654dc7135e974674fc470da458ce7 [84/85] fixup! time_stats: Promote to lib/
config: um-randconfig-002-20250309 (https://download.01.org/0day-ci/archive/20250309/202503092037.dqtvZzMM-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project e15545cad8297ec7555f26e5ae74a9f0511203e7)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250309/202503092037.dqtvZzMM-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/202503092037.dqtvZzMM-lkp@intel.com/

All errors (new ones prefixed by >>):

   /usr/bin/ld: warning: .tmp_vmlinux1 has a LOAD segment with RWX permissions
   /usr/bin/ld: kernel/sched/timestats_bt.o: in function `sched_wakeup_backtrace_init':
   kernel/sched/timestats_bt.c:196: undefined reference to `debugfs_sched'
>> /usr/bin/ld: kernel/sched/timestats_bt.c:196: undefined reference to `debugfs_sched'
   clang: error: linker command failed with exit code 1 (use -v to see invocation)

-- 
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https://github.com/intel/lkp-tests/wiki