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-rw-r--r--kernel/cgroup/cgroup.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 6cefa277f39c..2aba1c519138 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -4701,6 +4701,18 @@ static int __init cgroup_wq_init(void)
}
core_initcall(cgroup_wq_init);
+void cgroup_path_from_kernfs_id(const union kernfs_node_id *id,
+ char *buf, size_t buflen)
+{
+ struct kernfs_node *kn;
+
+ kn = kernfs_get_node_by_id(cgrp_dfl_root.kf_root, id);
+ if (!kn)
+ return;
+ kernfs_path(kn, buf, buflen);
+ kernfs_put(kn);
+}
+
/*
* proc_cgroup_show()
* - Print task's cgroup paths into seq_file, one line for each hierarchy