struct vfsmount *mnt;
void __put_namespace(struct namespace *namespace){	struct vfsmount *mnt;	down_write(&namespace->sem);	spin_lock(&vfsmount_lock);	list_for_each_entry(mnt, &namespace->list, mnt_list) {		mnt->mnt_namespace = NULL;	}	umount_tree(namespace->root);	spin_unlock(&vfsmount_lock);	up_write(&namespace->sem);	kfree(namespace);}