void transfer_pid(struct task_struct *old, struct task_struct *new,
enum pid_type type)
{
- if (type == PIDTYPE_PID)
- new->thread_pid = old->thread_pid;
+ WARN_ON_ONCE(type == PIDTYPE_PID);
hlist_replace_rcu(&old->pid_links[type], &new->pid_links[type]);
}