Merge tag 'core-urgent-2026-05-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull debugobjects fix from Ingo Molnar::

 - Fix debugobjects regression on -rt kernels: don't fill the pool
   (which uses a coarse lock) if ->pi_blocked_on, because that messes up
   the priority inheritance of callers

* tag 'core-urgent-2026-05-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  debugobjects: Do not fill_pool() if pi_blocked_on

Author: torvalds

lib/debugobjects.c

@@ -711,6 +711,15 @@ static struct debug_obj *lookup_object_or_alloc(void *addr, struct debug_bucket
 	return NULL;
 }
 
+static inline bool debug_objects_is_pi_blocked_on(void)
+{
+#ifdef CONFIG_RT_MUTEXES
+	return current->pi_blocked_on != NULL;
+#else
+	return false;
+#endif
+}
+
 static void debug_objects_fill_pool(void)
 {
 	if (!static_branch_likely(&obj_cache_enabled))
@@ -727,11 +736,12 @@ static void debug_objects_fill_pool(void)
 
 	/*
 	 * On RT enabled kernels the pool refill must happen in preemptible
-	 * context -- for !RT kernels we rely on the fact that spinlock_t and
-	 * raw_spinlock_t are basically the same type and this lock-type
-	 * inversion works just fine.
+	 * context and not enqueued on an rt_mutex -- for !RT kernels we rely
+	 * on the fact that spinlock_t and raw_spinlock_t are basically the
+	 * same type and this lock-type inversion works just fine.
 	 */
-	if (!IS_ENABLED(CONFIG_PREEMPT_RT) || preemptible() || system_state < SYSTEM_SCHEDULING) {
+	if (!IS_ENABLED(CONFIG_PREEMPT_RT) || system_state < SYSTEM_SCHEDULING ||
+	    (preemptible() && !debug_objects_is_pi_blocked_on())) {
 		/*
 		 * Annotate away the spinlock_t inside raw_spinlock_t warning
 		 * by temporarily raising the wait-type to LD_WAIT_CONFIG, matching