+static int proc_test_super(struct super_block *sb, void *data)
+{
+ return sb->s_fs_info == data;
+}
+
+static int proc_set_super(struct super_block *sb, void *data)
+{
+ struct pid_namespace *ns;
+
+ ns = (struct pid_namespace *)data;
+ sb->s_fs_info = get_pid_ns(ns);
+ return set_anon_super(sb, NULL);
+}
+
+static int proc_get_sb(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data, struct vfsmount *mnt)
+{
+ int err;
+ struct super_block *sb;
+ struct pid_namespace *ns;
+ struct proc_inode *ei;
+
+ if (proc_mnt) {
+ /* Seed the root directory with a pid so it doesn't need
+ * to be special in base.c. I would do this earlier but
+ * the only task alive when /proc is mounted the first time
+ * is the init_task and it doesn't have any pids.
+ */
+ ei = PROC_I(proc_mnt->mnt_sb->s_root->d_inode);
+ if (!ei->pid)
+ ei->pid = find_get_pid(1);
+ }