diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 6bca6f8176f0d8f105be5379b31837bf85f27da1..7eba7326b9b95568913ef0b774a44b20bd4b8e5f 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -113,6 +113,7 @@ static void bdi_work_free(struct rcu_head *head)
 static void wb_work_complete(struct bdi_work *work)
 {
 	const enum writeback_sync_modes sync_mode = work->args.sync_mode;
+	int onstack = bdi_work_on_stack(work);
 
 	/*
 	 * For allocated work, we can clear the done/seen bit right here.
@@ -120,9 +121,9 @@ static void wb_work_complete(struct bdi_work *work)
 	 * to after the RCU grace period, since the stack could be invalidated
 	 * as soon as bdi_work_clear() has done the wakeup.
 	 */
-	if (!bdi_work_on_stack(work))
+	if (!onstack)
 		bdi_work_clear(work);
-	if (sync_mode == WB_SYNC_NONE || bdi_work_on_stack(work))
+	if (sync_mode == WB_SYNC_NONE || onstack)
 		call_rcu(&work->rcu_head, bdi_work_free);
 }