--- zzzz-none-000/linux-5.4.213/kernel/notifier.c	2022-09-15 10:04:56.000000000 +0000
+++ miami-7690-761/linux-5.4.213/kernel/notifier.c	2024-05-29 11:20:02.000000000 +0000
@@ -64,6 +64,29 @@
 	return -ENOENT;
 }
 
+#ifdef CONFIG_SHOW_NOTIFIER_IF_OOPS
+int show_notifier_if_oops = -1;
+
+static void notifier_show_chain(void *nh, struct notifier_block **nl)
+{
+	struct notifier_block *nb;
+
+	nb = rcu_dereference_raw(*nl);
+
+	if (nb)
+		pr_info("Following notifiers will be called for chain (check System.map): %ps:\n",
+			nh);
+	else
+		/* chain is empty, no need to print out anything */
+		return;
+
+	while (nb) {
+		pr_info("  - %ps\n", nb->notifier_call);
+		nb = rcu_dereference_raw(nb->next);
+	}
+}
+#endif
+
 /**
  * notifier_call_chain - Informs the registered notifiers about an event.
  *	@nl:		Pointer to head of the blocking notifier chain
@@ -95,6 +118,10 @@
 			continue;
 		}
 #endif
+#ifdef CONFIG_SHOW_NOTIFIER_IF_OOPS
+		if (show_notifier_if_oops == raw_smp_processor_id())
+			pr_info("[notifier] %ps:\n", nb->notifier_call);
+#endif
 		ret = nb->notifier_call(nb, val, v);
 
 		if (nr_calls)
@@ -185,6 +212,10 @@
 	int ret;
 
 	rcu_read_lock();
+#ifdef CONFIG_SHOW_NOTIFIER_IF_OOPS
+	if (show_notifier_if_oops == raw_smp_processor_id())
+		notifier_show_chain(nh, &nh->head);
+#endif
 	ret = notifier_call_chain(&nh->head, val, v, nr_to_call, nr_calls);
 	rcu_read_unlock();
 	return ret;
@@ -319,6 +350,10 @@
 	 */
 	if (rcu_access_pointer(nh->head)) {
 		down_read(&nh->rwsem);
+#ifdef CONFIG_SHOW_NOTIFIER_IF_OOPS
+		if (show_notifier_if_oops == raw_smp_processor_id())
+			notifier_show_chain(nh, &nh->head);
+#endif
 		ret = notifier_call_chain(&nh->head, val, v, nr_to_call,
 					nr_calls);
 		up_read(&nh->rwsem);
@@ -396,6 +431,10 @@
 			      unsigned long val, void *v,
 			      int nr_to_call, int *nr_calls)
 {
+#ifdef CONFIG_SHOW_NOTIFIER_IF_OOPS
+	if (show_notifier_if_oops == raw_smp_processor_id())
+		notifier_show_chain(nh, &nh->head);
+#endif
 	return notifier_call_chain(&nh->head, val, v, nr_to_call, nr_calls);
 }
 EXPORT_SYMBOL_GPL(__raw_notifier_call_chain);
@@ -500,6 +539,10 @@
 	int idx;
 
 	idx = srcu_read_lock(&nh->srcu);
+#ifdef CONFIG_SHOW_NOTIFIER_IF_OOPS
+	if (show_notifier_if_oops == raw_smp_processor_id())
+		notifier_show_chain(nh, &nh->head);
+#endif
 	ret = notifier_call_chain(&nh->head, val, v, nr_to_call, nr_calls);
 	srcu_read_unlock(&nh->srcu, idx);
 	return ret;