Now that we have generic and well ordered cgroup tree walkers there is
no need to keep css_get_next in the place.
Signed-off-by: Michal Hocko <mhocko@xxxxxxx>
---
include/linux/cgroup.h | 7 -------
kernel/cgroup.c | 49 ------------------------------------------------
2 files changed, 56 deletions(-)
diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
index 329eb46..ba46041 100644
--- a/include/linux/cgroup.h
+++ b/include/linux/cgroup.h
@@ -676,13 +676,6 @@ void free_css_id(struct cgroup_subsys *ss, struct cgroup_subsys_state *css);
struct cgroup_subsys_state *css_lookup(struct cgroup_subsys *ss, int id);
-/*
- * Get a cgroup whose id is greater than or equal to id under tree of root.
- * Returning a cgroup_subsys_state or NULL.
- */
-struct cgroup_subsys_state *css_get_next(struct cgroup_subsys *ss, int id,
- struct cgroup_subsys_state *root, int *foundid);
-
/* Returns true if root is ancestor of cg */
bool css_is_ancestor(struct cgroup_subsys_state *cg,
const struct cgroup_subsys_state *root);
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index d51958a..4d874b2 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -5230,55 +5230,6 @@ struct cgroup_subsys_state *css_lookup(struct cgroup_subsys *ss, int id)
}
EXPORT_SYMBOL_GPL(css_lookup);
-/**
- * css_get_next - lookup next cgroup under specified hierarchy.
- * @ss: pointer to subsystem
- * @id: current position of iteration.
- * @root: pointer to css. search tree under this.
- * @foundid: position of found object.
- *
- * Search next css under the specified hierarchy of rootid. Calling under
- * rcu_read_lock() is necessary. Returns NULL if it reaches the end.
- */
-struct cgroup_subsys_state *
-css_get_next(struct cgroup_subsys *ss, int id,
- struct cgroup_subsys_state *root, int *foundid)
-{
- struct cgroup_subsys_state *ret = NULL;
- struct css_id *tmp;
- int tmpid;
- int rootid = css_id(root);
- int depth = css_depth(root);
-
- if (!rootid)
- return NULL;
-
- BUG_ON(!ss->use_id);
- WARN_ON_ONCE(!rcu_read_lock_held());
-
- /* fill start point for scan */
- tmpid = id;
- while (1) {
- /*
- * scan next entry from bitmap(tree), tmpid is updated after
- * idr_get_next().
- */
- tmp = idr_get_next(&ss->idr, &tmpid);
- if (!tmp)
- break;
- if (tmp->depth >= depth && tmp->stack[depth] == rootid) {
- ret = rcu_dereference(tmp->css);
- if (ret) {
- *foundid = tmpid;
- break;
- }
- }
- /* continue to scan from next id */
- tmpid = tmpid + 1;
- }
- return ret;
-}
-
/*
* get corresponding css from file open on cgroupfs directory
*/
--
1.7.10.4
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