diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 1ad0ee4..7db251a 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -772,7 +772,7 @@
 }
 EXPORT_SYMBOL_GPL(__create_workqueue_key);
 
-static void cleanup_workqueue_thread(struct cpu_workqueue_struct *cwq, int cpu)
+static void cleanup_workqueue_thread(struct cpu_workqueue_struct *cwq)
 {
 	/*
 	 * Our caller is either destroy_workqueue() or CPU_DEAD,
@@ -808,7 +808,6 @@
 void destroy_workqueue(struct workqueue_struct *wq)
 {
 	const cpumask_t *cpu_map = wq_cpu_map(wq);
-	struct cpu_workqueue_struct *cwq;
 	int cpu;
 
 	get_online_cpus();
@@ -816,10 +815,8 @@
 	list_del(&wq->list);
 	spin_unlock(&workqueue_lock);
 
-	for_each_cpu_mask(cpu, *cpu_map) {
-		cwq = per_cpu_ptr(wq->cpu_wq, cpu);
-		cleanup_workqueue_thread(cwq, cpu);
-	}
+	for_each_cpu_mask(cpu, *cpu_map)
+		cleanup_workqueue_thread(per_cpu_ptr(wq->cpu_wq, cpu));
 	put_online_cpus();
 
 	free_percpu(wq->cpu_wq);
@@ -860,7 +857,7 @@
 		case CPU_UP_CANCELED:
 			start_workqueue_thread(cwq, -1);
 		case CPU_DEAD:
-			cleanup_workqueue_thread(cwq, cpu);
+			cleanup_workqueue_thread(cwq);
 			break;
 		}
 	}