kernel/sched/ext.c:3701:16: error: 'struct task_group' has no member named 'idle'

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   88264981f2082248e892a706b2c5004650faac54
commit: 8195136669661fdfe54e9a8923c33b31c92fc1da sched_ext: Add cgroup support
date:   2 weeks ago
config: sparc-randconfig-002-20240922 (https://download.01.org/0day-ci/archive/20240922/202409220859.UiCAoFOW-lkp@intel.com/config)
compiler: sparc-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240922/202409220859.UiCAoFOW-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/202409220859.UiCAoFOW-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from kernel/sched/build_policy.c:63:
   kernel/sched/ext.c: In function 'scx_cgroup_warn_missing_idle':
>> kernel/sched/ext.c:3701:16: error: 'struct task_group' has no member named 'idle'
    3701 |         if (!tg->idle)
         |                ^~
   kernel/sched/ext.c: In function 'scx_ops_disable_workfn':
   kernel/sched/ext.c:4455:17: error: implicit declaration of function 'stack_trace_print'; did you mean 'event_trace_printk'? [-Wimplicit-function-declaration]
    4455 |                 stack_trace_print(ei->bt, ei->bt_len, 2);
         |                 ^~~~~~~~~~~~~~~~~
         |                 event_trace_printk
   kernel/sched/ext.c: In function 'scx_ops_exit_kind':
   kernel/sched/ext.c:4834:30: error: implicit declaration of function 'stack_trace_save'; did you mean 'stack_tracer_enable'? [-Wimplicit-function-declaration]
    4834 |                 ei->bt_len = stack_trace_save(ei->bt, SCX_EXIT_BT_LEN, 1);
         |                              ^~~~~~~~~~~~~~~~
         |                              stack_tracer_enable
--
   kernel/sched/core.c: In function 'cpu_idle_read_s64':
>> kernel/sched/core.c:9626:27: error: 'struct task_group' has no member named 'idle'
    9626 |         return css_tg(css)->idle;
         |                           ^~
   kernel/sched/core.c: In function 'cpu_idle_write_s64':
>> kernel/sched/core.c:9634:15: error: implicit declaration of function 'sched_group_set_idle'; did you mean 'scx_group_set_idle'? [-Wimplicit-function-declaration]
    9634 |         ret = sched_group_set_idle(css_tg(css), idle);
         |               ^~~~~~~~~~~~~~~~~~~~
         |               scx_group_set_idle
   kernel/sched/core.c: In function 'cpu_idle_read_s64':
   kernel/sched/core.c:9627:1: warning: control reaches end of non-void function [-Wreturn-type]
    9627 | }
         | ^


vim +3701 kernel/sched/ext.c

  3694	
  3695	static void scx_cgroup_warn_missing_idle(struct task_group *tg)
  3696	{
  3697		if (scx_ops_enable_state() == SCX_OPS_DISABLED ||
  3698		    cgroup_warned_missing_idle)
  3699			return;
  3700	
> 3701		if (!tg->idle)
  3702			return;
  3703	
  3704		pr_warn("sched_ext: \"%s\" does not implement cgroup cpu.idle\n",
  3705			scx_ops.name);
  3706		cgroup_warned_missing_idle = true;
  3707	}
  3708	

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