linux-kernel - Re: [PATCH 1/2] wait_task_zombie: remove unneeded child->signal check

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Message-Id: <20070805205144.314B04D04C4@magilla.localdomain>
Date:	Sun,  5 Aug 2007 13:51:44 -0700 (PDT)
From:	Roland McGrath <roland@...hat.com>
To:	Oleg Nesterov <oleg@...sign.ru>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] wait_task_zombie: remove unneeded child->signal check

> A zombie must have a valid ->signal, we are going to release it and
> __exit_signal() starts with BUG_ON(!sig).

Yes, this is safe because it's after the EXIT_DEAD check under tasklist_lock.


Thanks,
Roland
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