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-rw-r--r--fs/fs-writeback.c2
-rw-r--r--mm/memcontrol.c3
2 files changed, 0 insertions, 5 deletions
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;
}