1 files changed, 5 insertions, 0 deletions

diff --git a/kernel/sched_autogroup.h b/kernel/sched_autogroup.h
index 7b859ffe5dad..05577055cfca 100644
--- a/kernel/sched_autogroup.h
+++ b/kernel/sched_autogroup.h
@@ -1,6 +1,11 @@
 #ifdef CONFIG_SCHED_AUTOGROUP
 
 struct autogroup {
+        /*
+         * reference doesn't mean how many thread attach to this
+         * autogroup now. It just stands for the number of task
+         * could use this autogroup.
+         */
         struct kref             kref;
         struct task_group       *tg;
         struct rw_semaphore     lock;