linux-kernel - Re: [PATCH] debug work struct cancel deadlocks with lockdep

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Message-Id: <1183627186.3818.24.camel@johannes.berg>
Date:	Thu, 05 Jul 2007 11:19:46 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...sign.ru>,
	Arjan van de Ven <arjan@...radead.org>,
	Thomas Sattler <tsattler@....de>
Subject: Re: [PATCH] debug work struct cancel deadlocks with lockdep

On Thu, 2007-07-05 at 11:10 +0200, Peter Zijlstra wrote:

> > +/* both _name and _key must not be NULL */

Heh actually I got confused. The requirement that _key is not NULL comes
from the fact that I need to copy it for the workqueue stuff, not from
lockdep. Hence, only _name must be non-NULL, I'll change the comment to
reflect that.

> > +#define STATIC_LOCKDEP_MAP_INIT(_name, _key) \
> > +	{ .name = (_name), .key = (_key), }
> 
> looks sane enough :-)

:)

I'll repost with these minor changes directly to akpm tomorrow then; no
lockdep support on my powerbook that I'm using right now so I can't even
compile-test.

johannes

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