--- x/kernel/rcu/tree.c
+++ y/kernel/rcu/tree.c
@@ -5149,6 +5149,8 @@ static void __init rcu_dump_rcu_node_tre
 
 struct workqueue_struct *rcu_gp_wq;
 
+static DEFINE_PER_CPU(struct lock_class_key, krc_lock_key);
+
 static void __init kfree_rcu_batch_init(void)
 {
 	int cpu;
@@ -5169,6 +5171,11 @@ static void __init kfree_rcu_batch_init(
 
 	for_each_possible_cpu(cpu) {
 		struct kfree_rcu_cpu *krcp = per_cpu_ptr(&krc, cpu);
+		struct lock_class_key *key = per_cpu_ptr(&krc_lock_key, cpu);
+		char name[32] = {0};
+
+		sprintf(name, "krc%d", cpu);
+		lockdep_set_class_and_name(&krcp->lock, key, name);
 
 		for (i = 0; i < KFREE_N_BATCHES; i++) {
 			INIT_RCU_WORK(&krcp->krw_arr[i].rcu_work, kfree_rcu_work);