Merge tag 'sched-urgent-2026-09-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler fixes from Ingo Molnar:

 - Fix a timestamping bug in pick_task_fair() and yield_task_fair()
   (Zhan Xusheng)

 - Skip migrate-disabled tasks when picking a push candidate in the
   RT and DL schedulers (Seiji Nishikawa)

 - Skip rq->avg_idle update without a valid idle_stamp (Shubhang
   Kaushik)

 - Fix throttling bug in throttle_cfs_rq(), caused by the recent
   single-runqueue conversion (Wanwu Li)

 - Fix bandwidth calculation bug in distribute_cfs_runtime(),
   caused by the single-runqueue conversion (Wanwu Li)

 - Don't make x86 ITMT enablement depend on debugfs (Mario Limonciello)

 - Avoid creating misfits during cache-aware load-balancing on hybrid
   systems (Tim Chen)

* tag 'sched-urgent-2026-09-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/fair: Avoid creating misfits during cache-aware balancing
  x86/itmt: Don't make ITMT enablement depend on debugfs
  sched/fair: Use cfs_rq->h_curr in distribute_cfs_runtime()
  sched/fair: Use cfs_rq->h_curr in throttle_cfs_rq()
  sched/core: Skip rq->avg_idle update without a valid idle_stamp
  sched/rt,dl: Skip migrate-disabled tasks when picking a push candidate
  sched/fair: Use update_curr_eevdf() for the remaining root cfs_rq callers

1 files changed, 2 insertions, 6 deletions

diff --git a/arch/x86/kernel/itmt.c b/arch/x86/kernel/itmt.c
index 243a769fdd97..85ebde361d6a 100644
--- a/arch/x86/kernel/itmt.c
+++ b/arch/x86/kernel/itmt.c
@@ -110,18 +110,14 @@ int sched_set_itmt_support(void)
 						    arch_debugfs_dir,
 						    &sysctl_sched_itmt_enabled,
 						    &dfs_sched_itmt_fops);
-	if (IS_ERR_OR_NULL(dfs_sched_itmt)) {
+	if (IS_ERR(dfs_sched_itmt))
 		dfs_sched_itmt = NULL;
-		return -ENOMEM;
-	}
 
 	dfs_sched_core_prio = debugfs_create_file("sched_core_priority", 0644,
 						  arch_debugfs_dir, NULL,
 						  &sched_core_priority_fops);
-	if (IS_ERR_OR_NULL(dfs_sched_core_prio)) {
+	if (IS_ERR(dfs_sched_core_prio))
 		dfs_sched_core_prio = NULL;
-		return -ENOMEM;
-	}
 
 	sched_itmt_capable = true;