linux-kernel - Re: [PATCH] timerfd/eventfd context lock doesn't protect against poll

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Message-ID: <alpine.LFD.0.98.0705180744040.3890@woody.linux-foundation.org>
Date:	Fri, 18 May 2007 07:45:07 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Davide Libenzi <davidel@...ilserver.org>
cc:	Davi Arnaut <davi@...ent.com.br>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] timerfd/eventfd context lock doesn't protect against
 poll_wait



On Thu, 17 May 2007, Davide Libenzi wrote:
> 
> Thx Davi, patch is correct. Nice catch. But at this point instead of 
> ending up getting two locks, we may look into using Andrew suggestion of 
> reusing the waitqueue lock. Is it universally considered a "legal" 
> operation?

Yes. Perhaps not for drivers etc, but stuff that is deeply involved in 
waitqueue handling anyway, sure.

		Linus
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