linux-kernel - [PATCH 3/4] pid_ns: de_thread: kill the now unneeded ->child

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Message-ID: <20080824154912.GA3783@tv-sign.ru>
Date:	Sun, 24 Aug 2008 19:49:12 +0400
From:	Oleg Nesterov <oleg@...sign.ru>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Robert Rex <robert.rex@...sol.com>,
	Roland McGrath <roland@...hat.com>,
	Serge Hallyn <serue@...ibm.com>,
	Sukadev Bhattiprolu <sukadev@...ibm.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] pid_ns: de_thread: kill the now unneeded ->child_reaper change

de_thread() checks if the old leader was the ->child_reaper, this is not
possible any longer. With the previous patch ->group_leader itself will
change ->child_reaper on exit.

>From now find_new_reaper() is the only function (apart from initialization)
which plays with ->child_reaper.

Signed-off-by: Oleg Nesterov <oleg@...sign.ru>

--- 2.6.27-rc4/fs/exec.c~3_EXEC	2008-07-30 13:12:47.000000000 +0400
+++ 2.6.27-rc4/fs/exec.c	2008-08-24 19:20:05.000000000 +0400
@@ -825,8 +825,6 @@ static int de_thread(struct task_struct 
 			schedule();
 		}
 
-		if (unlikely(task_child_reaper(tsk) == leader))
-			task_active_pid_ns(tsk)->child_reaper = tsk;
 		/*
 		 * The only record we have of the real-time age of a
 		 * process, regardless of execs it's done, is start_time.

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