1 files changed, 11 insertions, 2 deletions

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index c3d1802a9b30..50b94113f4f7 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -3271,8 +3271,17 @@ int cgroup_add_legacy_cftypes(struct cgroup_subsys *ss, struct cftype *cfts)
 {
         struct cftype *cft;
 
-        for (cft = cfts; cft && cft->name[0] != '\0'; cft++)
-                cft->flags |= __CFTYPE_NOT_ON_DFL;
+        /*
+         * If legacy_flies_on_dfl, we want to show the legacy files on the
+         * dfl hierarchy but iff the target subsystem hasn't been updated
+         * for the dfl hierarchy yet.
+         */
+        if (!cgroup_legacy_files_on_dfl ||
+            ss->dfl_cftypes != ss->legacy_cftypes) {
+                for (cft = cfts; cft && cft->name[0] != '\0'; cft++)
+                        cft->flags |= __CFTYPE_NOT_ON_DFL;
+        }
+
         return cgroup_add_cftypes(ss, cfts);
 }