cgroup: rename cgroup->dummy_css to ->self and move it to the top

cgroup->dummy_css is used as the placeholder css when performing css
oriended operations on the cgroup.  We're gonna shift more cgroup
management to this css.  Let's rename it to ->self and move it to the
top.

This is pure rename and field relocation.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Li Zefan <lizefan@huawei.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index aa7353deaaf3..164851e388e7 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -143,6 +143,9 @@ enum {
 };
 
 struct cgroup {
+        /* self css with NULL ->ss, points back to this cgroup */
+        struct cgroup_subsys_state self;
+
         unsigned long flags;            /* "unsigned long" so bitops work */
 
         /*
@@ -224,9 +227,6 @@ struct cgroup {
         struct list_head pidlists;
         struct mutex pidlist_mutex;
 
-        /* dummy css with NULL ->ss, points back to this cgroup */
-        struct cgroup_subsys_state dummy_css;
-
         /* For css percpu_ref killing and RCU-protected deletion */
         struct rcu_head rcu_head;
         struct work_struct destroy_work;