cgroup: rename ->create/post_create/pre_destroy/destroy() to ->css_alloc/online/offline/free()

Rename cgroup_subsys css lifetime related callbacks to better describe
what their roles are.  Also, update documentation.

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

1 files changed, 7 insertions, 7 deletions

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 3dc60fc441cb..3f6d39d23bb6 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -600,7 +600,7 @@ struct cftype blkcg_files[] = {
 };
 
 /**
- * blkcg_pre_destroy - cgroup pre_destroy callback
+ * blkcg_css_offline - cgroup css_offline callback
  * @cgroup: cgroup of interest
  *
  * This function is called when @cgroup is about to go away and responsible
@@ -610,7 +610,7 @@ struct cftype blkcg_files[] = {
  *
  * This is the blkcg counterpart of ioc_release_fn().
  */
-static void blkcg_pre_destroy(struct cgroup *cgroup)
+static void blkcg_css_offline(struct cgroup *cgroup)
 {
         struct blkcg *blkcg = cgroup_to_blkcg(cgroup);
 
@@ -634,7 +634,7 @@ static void blkcg_pre_destroy(struct cgroup *cgroup)
         spin_unlock_irq(&blkcg->lock);
 }
 
-static void blkcg_destroy(struct cgroup *cgroup)
+static void blkcg_css_free(struct cgroup *cgroup)
 {
         struct blkcg *blkcg = cgroup_to_blkcg(cgroup);
 
@@ -642,7 +642,7 @@ static void blkcg_destroy(struct cgroup *cgroup)
                 kfree(blkcg);
 }
 
-static struct cgroup_subsys_state *blkcg_create(struct cgroup *cgroup)
+static struct cgroup_subsys_state *blkcg_css_alloc(struct cgroup *cgroup)
 {
         static atomic64_t id_seq = ATOMIC64_INIT(0);
         struct blkcg *blkcg;
@@ -739,10 +739,10 @@ static int blkcg_can_attach(struct cgroup *cgrp, struct cgroup_taskset *tset)
 
 struct cgroup_subsys blkio_subsys = {
         .name = "blkio",
-        .create = blkcg_create,
+        .css_alloc = blkcg_css_alloc,
+        .css_offline = blkcg_css_offline,
+        .css_free = blkcg_css_free,
         .can_attach = blkcg_can_attach,
-        .pre_destroy = blkcg_pre_destroy,
-        .destroy = blkcg_destroy,
         .subsys_id = blkio_subsys_id,
         .base_cftypes = blkcg_files,
         .module = THIS_MODULE,