If a given subsystem is not the base type and does not have a flush
func, do not allocate.
Signed-off-by: JP Kobryn <inwardvessel@xxxxxxxxx>
---
kernel/cgroup/rstat.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/cgroup/rstat.c b/kernel/cgroup/rstat.c
index 03effaaf09a4..4feefa37fa46 100644
--- a/kernel/cgroup/rstat.c
+++ b/kernel/cgroup/rstat.c
@@ -423,6 +423,9 @@ int cgroup_rstat_init(struct cgroup_subsys_state *css)
{
int cpu;
+ if (css->ss && !css->ss->css_rstat_flush)
+ return 0;
+
/* the root cgrp css has rstat_cpu preallocated */
if (!css->rstat_cpu) {
css->rstat_cpu = alloc_percpu(struct cgroup_rstat_cpu);
@@ -445,6 +448,9 @@ void cgroup_rstat_exit(struct cgroup_subsys_state *css)
{
int cpu;
+ if (css->ss && !css->ss->css_rstat_flush)
+ return;
+
cgroup_rstat_flush(css);
/* sanity check */
--
2.47.1
