diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 8747932..d8e9222 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -233,6 +233,7 @@
 struct cgroup_subsys {
 	struct cgroup_subsys_state *(*create)(struct cgroup_subsys *ss,
 						  struct cgroup *cont);
+	void (*pre_destroy)(struct cgroup_subsys *ss, struct cgroup *cont);
 	void (*destroy)(struct cgroup_subsys *ss, struct cgroup *cont);
 	int (*can_attach)(struct cgroup_subsys *ss,
 			  struct cgroup *cont, struct task_struct *tsk);
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 4d67a39..4e8b16a 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -586,6 +586,21 @@
 	return inode;
 }
 
+/*
+ * Call subsys's pre_destroy handler.
+ * This is called before css refcnt check.
+ */
+
+static void cgroup_call_pre_destroy(struct cgroup *cgrp)
+{
+	struct cgroup_subsys *ss;
+	for_each_subsys(cgrp->root, ss)
+		if (ss->pre_destroy && cgrp->subsys[ss->subsys_id])
+			ss->pre_destroy(ss, cgrp);
+	return;
+}
+
+
 static void cgroup_diput(struct dentry *dentry, struct inode *inode)
 {
 	/* is dentry a directory ? if so, kfree() associated cgroup */
@@ -2160,6 +2175,13 @@
 	parent = cgrp->parent;
 	root = cgrp->root;
 	sb = root->sb;
+	/*
+	 * Call pre_destroy handlers of subsys
+	 */
+	cgroup_call_pre_destroy(cgrp);
+	/*
+	 * Notify subsyses that rmdir() request comes.
+	 */
 
 	if (cgroup_has_css_refs(cgrp)) {
 		mutex_unlock(&cgroup_mutex);