[PATCH -next] cgroup, legacy_freezer: update comment for freezer_css_offline()

[Xiu Jianfeng]

After commit f5d39b020809 ("freezer,sched: Rewrite core freezer logic"),
system_freezing_count was replaced by freezer_active.

Signed-off-by: Xiu Jianfeng <xiujianfeng@xxxxxxxxxx>
---
 kernel/cgroup/legacy_freezer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/cgroup/legacy_freezer.c b/kernel/cgroup/legacy_freezer.c
index 66d1708042a7..afbf7f8a86c0 100644
--- a/kernel/cgroup/legacy_freezer.c
+++ b/kernel/cgroup/legacy_freezer.c
@@ -133,7 +133,7 @@ static int freezer_css_online(struct cgroup_subsys_state *css)
  * freezer_css_offline - initiate destruction of a freezer css
  * @css: css being destroyed
  *
- * @css is going away.  Mark it dead and decrement system_freezing_count if
+ * @css is going away.  Mark it dead and decrement freezer_active if
  * it was holding one.
  */
 static void freezer_css_offline(struct cgroup_subsys_state *css)
-- 
2.34.1