[PATCH v5 1/5] cgroup: use helper for distingushing css in callbacks

[JP Kobryn <inwardvessel@gmail.com>]

The callbacks used for cleaning up css's check whether the css is
associated with a subsystem or not. Instead of just checking the ss
pointer, use the helper functions to better show the intention.

Signed-off-by: JP Kobryn <inwardvessel@gmail.com>
---
 kernel/cgroup/cgroup.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 7471811a00de..125240f8318c 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -5406,7 +5406,7 @@ static void css_free_rwork_fn(struct work_struct *work)
 
 	percpu_ref_exit(&css->refcnt);
 
-	if (ss) {
+	if (!css_is_cgroup(css)) {
 		/* css free path */
 		struct cgroup_subsys_state *parent = css->parent;
 		int id = css->id;
@@ -5460,7 +5460,7 @@ static void css_release_work_fn(struct work_struct *work)
 	css->flags |= CSS_RELEASED;
 	list_del_rcu(&css->sibling);
 
-	if (ss) {
+	if (!css_is_cgroup(css)) {
 		struct cgroup *parent_cgrp;
 
 		/* css release path */
-- 
2.47.1