Re: [PATCH] rcu_read_lock/unlock protect find_task_by_vpid call

[Tetsuo Handa]

Paul E. McKenney wrote:
> So we should remove the lockdep_tasklist_lock_is_held() and then
> apply Sergey's patch, correct?

Yes. rcu_lockdep_assert(rcu_read_lock_held()) in find_task_by_pid_ns()
is correct and callers need to use rcu_read_lock().

As of 2.6.32, there are 20+ users who missed rcu_read_lock().
So, similar reports will be posted like popcorn.
http://kerneltrap.org/mailarchive/linux-kernel/2009/12/11/4518016
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