[jlelli:upstream/deadline/domains-suspend 2/4] kernel/sched/rt.c:2913:14: error: use of undeclared identifier 'sched_domains_mutex'

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

tree:   https://github.com/jlelli/linux.git upstream/deadline/domains-suspend
head:   78c2e4083eeedc3526f07bedfca514eefbe45e38
commit: dfdff94e7f88b77e61e6cf8ec6aeea320fa12e7e [2/4] sched/deadline: Generalize unique visiting of root domains
config: x86_64-buildonly-randconfig-002-20250227 (https://download.01.org/0day-ci/archive/20250227/202502270513.eQknwYIs-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250227/202502270513.eQknwYIs-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/202502270513.eQknwYIs-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from kernel/sched/build_policy.c:52:
>> kernel/sched/rt.c:2913:14: error: use of undeclared identifier 'sched_domains_mutex'
    2913 |         mutex_lock(&sched_domains_mutex);
         |                     ^
   kernel/sched/rt.c:2940:16: error: use of undeclared identifier 'sched_domains_mutex'
    2940 |         mutex_unlock(&sched_domains_mutex);
         |                       ^
   2 errors generated.


vim +/sched_domains_mutex +2913 kernel/sched/rt.c

  2904	
  2905	static int sched_rt_handler(const struct ctl_table *table, int write, void *buffer,
  2906			size_t *lenp, loff_t *ppos)
  2907	{
  2908		int old_period, old_runtime;
  2909		static DEFINE_MUTEX(mutex);
  2910		int ret;
  2911	
  2912		mutex_lock(&mutex);
> 2913		mutex_lock(&sched_domains_mutex);
  2914		old_period = sysctl_sched_rt_period;
  2915		old_runtime = sysctl_sched_rt_runtime;
  2916	
  2917		ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
  2918	
  2919		if (!ret && write) {
  2920			ret = sched_rt_global_validate();
  2921			if (ret)
  2922				goto undo;
  2923	
  2924			ret = sched_dl_global_validate();
  2925			if (ret)
  2926				goto undo;
  2927	
  2928			ret = sched_rt_global_constraints();
  2929			if (ret)
  2930				goto undo;
  2931	
  2932			sched_rt_do_global();
  2933			sched_dl_do_global();
  2934		}
  2935		if (0) {
  2936	undo:
  2937			sysctl_sched_rt_period = old_period;
  2938			sysctl_sched_rt_runtime = old_runtime;
  2939		}
  2940		mutex_unlock(&sched_domains_mutex);
  2941		mutex_unlock(&mutex);
  2942	
  2943		return ret;
  2944	}
  2945	

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