2 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
index 17444505c870..62413c3e2f4b 100644
--- a/include/linux/cgroup-defs.h
+++ b/include/linux/cgroup-defs.h
@@ -211,6 +211,9 @@ struct css_set {
          */
         struct list_head e_cset_node[CGROUP_SUBSYS_COUNT];
 
+        /* all css_task_iters currently walking this cset */
+        struct list_head task_iters;
+
         /* For RCU-protected deletion */
         struct rcu_head rcu_head;
 };
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index bdfdb3a1a83c..a9dcf0e76865 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -42,6 +42,10 @@ struct css_task_iter {
         struct list_head                *task_pos;
         struct list_head                *tasks_head;
         struct list_head                *mg_tasks_head;
+
+        struct css_set                  *cur_cset;
+        struct task_struct              *cur_task;
+        struct list_head                iters_node;     /* css_set->task_iters */
 };
 
 extern struct cgroup_root cgrp_dfl_root;