cgroup: s/cgroup_subsys_state/cgroup_css/ s/task_subsys_state/task_css/

The names of the two struct cgroup_subsys_state accessors -
cgroup_subsys_state() and task_subsys_state() - are somewhat awkward.
The former clashes with the type name and the latter doesn't even
indicate it's somehow related to cgroup.

We're about to revamp large portion of cgroup API, so, let's rename
them so that they're less awkward.  Most per-controller usages of the
accessors are localized in accessor wrappers and given the amount of
scheduled changes, this isn't gonna add any noticeable headache.

Rename cgroup_subsys_state() to cgroup_css() and task_subsys_state()
to task_css().  This patch is pure rename.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/kernel/cgroup_freezer.c b/kernel/cgroup_freezer.c
index 75dda1ea5026..9d3f61566fec 100644
--- a/kernel/cgroup_freezer.c
+++ b/kernel/cgroup_freezer.c
@@ -47,13 +47,13 @@ struct freezer {
 
 static inline struct freezer *cgroup_freezer(struct cgroup *cgroup)
 {
-	return container_of(cgroup_subsys_state(cgroup, freezer_subsys_id),
+	return container_of(cgroup_css(cgroup, freezer_subsys_id),
 			    struct freezer, css);
 }
 
 static inline struct freezer *task_freezer(struct task_struct *task)
 {
-	return container_of(task_subsys_state(task, freezer_subsys_id),
+	return container_of(task_css(task, freezer_subsys_id),
 			    struct freezer, css);
 }