[PATCH v2 0/4] copy_process/attach_pid minor fix + cleanups

[Oleg Nesterov]

Hello.

1/4 and 2/4 look like the obvious cleanups.

3/4 tries to fix the minor problem. I have to admit, initially
I thought that this problem is more serious. But it seems that
nothing really bad can happen if the new task has the wrong pid
or group_leader. Still I think this makes sense.

4/4 is offtopic minor cleanup.


This is also another preparation for while_each_thread() fixes.

Oleg.

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