linux-kernel - Re: [06/11] tty: fix race in tty

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Message-ID: <m14om8xyep.fsf@fess.ebiederm.org>
Date:	Tue, 26 Jan 2010 15:02:38 -0800
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Greg KH <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	stable@...nel.org, stable-review@...nel.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Al Viro <viro@...IV.linux.org.uk>,
	Tavis Ormandy <taviso@...gle.com>,
	Jeff Dike <jdike@...toit.com>, Julien Tinnes <jln@...gle.com>,
	Matt Mackall <mpm@...enic.com>
Subject: Re: [06/11] tty: fix race in tty_fasync

Linus Torvalds <torvalds@...ux-foundation.org> writes:

> On Tue, 26 Jan 2010, Eric W. Biederman wrote:
>
>> Greg KH <gregkh@...e.de> writes:
>> 
>> > 2.6.27-stable review patch.  If anyone has any objections, please let us know.
>> 
>> Only that __f_setown by way of f_modown unconditionally enables interrupts.  So
>> without touching f_modown as well in mainline we have nasty sounding lockdep warnings.
>
> Hmm. That seems to be true in mainline too, isn't it?

Yes.  We are having that conversation in the thread:
   "[2.6.33-rc5] starting emacs makes lockdep warning"

Eric
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