2 files changed, 20 insertions, 0 deletions

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 5e0c6a1ce8b3..21510c9aa89c 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2275,6 +2275,10 @@ void proc_flush_task(struct task_struct *task)
                 proc_flush_task_mnt(upid->ns->proc_mnt, upid->nr,
                                 leader ? 0 : tgid->numbers[i].nr);
         }
+
+        upid = &pid->numbers[pid->level];
+        if (upid->nr == 1)
+                pid_ns_release_proc(upid->ns);
 }
 
 static struct dentry *proc_pid_instantiate(struct inode *dir,
diff --git a/fs/proc/root.c b/fs/proc/root.c
index 94e9d734384e..ec9cb3b6c93b 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -212,6 +212,22 @@ struct proc_dir_entry proc_root = {
         .parent         = &proc_root,
 };
 
+int pid_ns_prepare_proc(struct pid_namespace *ns)
+{
+        struct vfsmount *mnt;
+
+        mnt = kern_mount_data(&proc_fs_type, ns);
+        if (IS_ERR(mnt))
+                return PTR_ERR(mnt);
+
+        return 0;
+}
+
+void pid_ns_release_proc(struct pid_namespace *ns)
+{
+        mntput(ns->proc_mnt);
+}
+
 EXPORT_SYMBOL(proc_symlink);
 EXPORT_SYMBOL(proc_mkdir);
 EXPORT_SYMBOL(create_proc_entry);