X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=mm%2Fbacking-dev.c;h=bf5525c2e561a018f2ba056b0d803edb00f0e548;hb=refs%2Fheads%2Fsandbox%2Flstelmach%2Fvirgl;hp=c30419a5e1197dbc9700cc8d22d5a07ed185a3cb;hpb=098179413d07392ad8c52c7c7605d3d3886ef569;p=platform%2Fkernel%2Flinux-starfive.git

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index c30419a..bf5525c 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -380,6 +380,15 @@ static LIST_HEAD(offline_cgwbs);
 static void cleanup_offline_cgwbs_workfn(struct work_struct *work);
 static DECLARE_WORK(cleanup_offline_cgwbs_work, cleanup_offline_cgwbs_workfn);
 
+static void cgwb_free_rcu(struct rcu_head *rcu_head)
+{
+	struct bdi_writeback *wb = container_of(rcu_head,
+			struct bdi_writeback, rcu);
+
+	percpu_ref_exit(&wb->refcnt);
+	kfree(wb);
+}
+
 static void cgwb_release_workfn(struct work_struct *work)
 {
 	struct bdi_writeback *wb = container_of(work, struct bdi_writeback,
@@ -402,11 +411,10 @@ static void cgwb_release_workfn(struct work_struct *work)
 	list_del(&wb->offline_node);
 	spin_unlock_irq(&cgwb_lock);
 
-	percpu_ref_exit(&wb->refcnt);
 	wb_exit(wb);
 	bdi_put(bdi);
 	WARN_ON_ONCE(!list_empty(&wb->b_attached));
-	kfree_rcu(wb, rcu);
+	call_rcu(&wb->rcu, cgwb_free_rcu);
 }
 
 static void cgwb_release(struct percpu_ref *refcnt)