linux-kernel - Re: [2.6.33-rc5] starting emacs makes lockdep warning

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Message-ID: <20100126060705.GF19799@ZenIV.linux.org.uk>
Date:	Tue, 26 Jan 2010 06:07:06 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Am??rico Wang <xiyou.wangcong@...il.com>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Tavis Ormandy <taviso@...gle.com>,
	Jeff Dike <jdike@...toit.com>, Julien Tinnes <jln@...gle.com>,
	Matt Mackall <mpm@...enic.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [2.6.33-rc5] starting emacs makes lockdep warning

On Tue, Jan 26, 2010 at 02:01:12PM +0800, Am??rico Wang wrote:

> I agree, it seems that patch is useless, since we already
> do lock_kernel() before calling __f_setown()...

What's to prevent pid from being freed under us?  BKL won't...
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