diff --git a/binder/binder_alloc.c b/binder/binder_alloc.c
index 45c2c56..9afc7bb 100644
--- a/binder/binder_alloc.c
+++ b/binder/binder_alloc.c
@@ -1003,6 +1003,10 @@ enum lru_status binder_alloc_free_page(struct list_head *item,
 	size_t index;
 	struct vm_area_struct *vma;
 
+	/* Since 6.13 the list_lru callback gets no lock; it lives in lru. */
+	if (!lock)
+		lock = &lru->lock;
+
 	alloc = page->alloc;
 	if (!mutex_trylock(&alloc->mutex))
 		goto err_get_alloc_mutex_failed;