diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 023f6a1f23cd..6915c950e6e8 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -677,9 +677,7 @@ void wbc_account_io(struct writeback_control *wbc, struct page *page,
 	if (!wbc->wb)
 		return;
 
-	rcu_read_lock();
 	id = mem_cgroup_css_from_page(page)->id;
-	rcu_read_unlock();
 
 	if (id == wbc->wb_id) {
 		wbc->wb_bytes += bytes;
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index bee6b1c9fdce..23d8cf5a86c3 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -382,14 +382,11 @@ struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page)
 {
 	struct mem_cgroup *memcg;
 
-	rcu_read_lock();
-
 	memcg = page->mem_cgroup;
 
 	if (!memcg || !cgroup_subsys_on_dfl(memory_cgrp_subsys))
 		memcg = root_mem_cgroup;
 
-	rcu_read_unlock();
 	return &memcg->css;
 }