1 files changed, 5 insertions, 2 deletions

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 671dc05c0b0f..909a7d31ffd3 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -2825,9 +2825,10 @@ static ssize_t __cgroup_procs_write(struct kernfs_open_file *of, char *buf,
                                     size_t nbytes, loff_t off, bool threadgroup)
 {
         struct task_struct *tsk;
+        struct cgroup_subsys *ss;
         struct cgroup *cgrp;
         pid_t pid;
-        int ret;
+        int ssid, ret;
 
         if (kstrtoint(strstrip(buf), 0, &pid) || pid < 0)
                 return -EINVAL;
@@ -2875,8 +2876,10 @@ out_unlock_rcu:
         rcu_read_unlock();
 out_unlock_threadgroup:
         percpu_up_write(&cgroup_threadgroup_rwsem);
+        for_each_subsys(ss, ssid)
+                if (ss->post_attach)
+                        ss->post_attach();
         cgroup_kn_unlock(of->kn);
-        cpuset_post_attach_flush();
         return ret ?: nbytes;
 }