a72032ecf33c63d8a4abb64b08c1a0b847c82a32.patch

From a72032ecf33c63d8a4abb64b08c1a0b847c82a32 Mon Sep 17 00:00:00 2001
From: lateautumn233 <lateautumn233@foxmail.com>
Date: Fri, 21 Jul 2023 21:30:41 +0800
Subject: [PATCH] cgroup: fix cgroup prefix

---
 kernel/cgroup/cgroup.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 193f092ea393..a2fffa8c4fd6 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -4012,6 +4012,10 @@ static int cgroup_add_file(struct cgroup_subsys_state *css, struct cgroup *cgrp,
 		cfile->kn = kn;
 		spin_unlock_irq(&cgroup_file_kn_lock);
 	}
+	if (cft->ss && (cgrp->root->flags & CGRP_ROOT_NOPREFIX) && !(cft->flags & CFTYPE_NO_PREFIX)) {
+				snprintf(name, CGROUP_FILE_NAME_MAX, "%s.%s", cft->ss->name, cft->name);
+				kernfs_create_link(cgrp->kn, name, kn);
+	}
 
 	return 0;
 }