[PATCH 3/4] move exit_ptrace() from forget_original_parent() to do_exit()

[Oleg Nesterov <oleg@redhat.com>]

By discussion with Roland.

Call exit_ptrace() from do_exit(), no need to delay this call until
forget_original_parent().

If we ever change exit_ptrace() to do the blocking calls, it makes
sense to move it after exit_signals().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>

--- 6.29-rc3/kernel/exit.c~3_MOVE	2009-02-11 06:37:36.000000000 +0100
+++ 6.29-rc3/kernel/exit.c	2009-02-11 07:20:54.000000000 +0100
@@ -803,8 +803,6 @@ static void forget_original_parent(struc
 	struct task_struct *p, *n, *reaper;
 	LIST_HEAD(dead_childs);
 
-	exit_ptrace(father);
-
 	write_lock_irq(&tasklist_lock);
 	reaper = find_new_reaper(father);
 
@@ -956,6 +954,7 @@ NORET_TYPE void do_exit(long code)
 		schedule();
 	}
 
+	exit_ptrace(tsk);
 	exit_signals(tsk);  /* sets PF_EXITING */
 	/*
 	 * tsk->flags are checked in the futex code to protect against