1 files changed, 3 insertions, 1 deletions

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 402ce477c47e..2a59d3101e5d 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -38,6 +38,7 @@ extern void cgroup_exit(struct task_struct *p, int run_callbacks);
 extern int cgroupstats_build(struct cgroupstats *stats,
                                 struct dentry *dentry);
 extern int cgroup_load_subsys(struct cgroup_subsys *ss);
+extern void cgroup_unload_subsys(struct cgroup_subsys *ss);
 
 extern const struct file_operations proc_cgroup_operations;
 
@@ -271,7 +272,8 @@ struct css_set {
         /*
          * Set of subsystem states, one for each subsystem. This array
          * is immutable after creation apart from the init_css_set
-         * during subsystem registration (at boot time).
+         * during subsystem registration (at boot time) and modular subsystem
+         * loading/unloading.
          */
         struct cgroup_subsys_state *subsys[CGROUP_SUBSYS_COUNT];