diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c
index 46f5e86ad5696fe21dcac2eedd6246fb3f9062b2..0173c7206544cfdb2847a4607c3c92d2238cade1 100644
--- a/kernel/locking/qspinlock.c
+++ b/kernel/locking/qspinlock.c
@@ -406,6 +406,21 @@ void queued_spin_lock_slowpath(struct qspinlock *lock, u32 val)
 	idx = node->count++;
 	tail = encode_tail(smp_processor_id(), idx);
 
+	/*
+	 * 4 nodes are allocated based on the assumption that there will
+	 * not be nested NMIs taking spinlocks. That may not be true in
+	 * some architectures even though the chance of needing more than
+	 * 4 nodes will still be extremely unlikely. When that happens,
+	 * we fall back to spinning on the lock directly without using
+	 * any MCS node. This is not the most elegant solution, but is
+	 * simple enough.
+	 */
+	if (unlikely(idx >= MAX_NODES)) {
+		while (!queued_spin_trylock(lock))
+			cpu_relax();
+		goto release;
+	}
+
 	node = grab_mcs_node(node, idx);
 
 	/*