linux-kernel - Re: [Ksummit-2010-discuss] [v2] Remaining BKL users, what to do

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Message-ID: <20101019202912.GA30133@kroah.com>
Date:	Tue, 19 Oct 2010 13:29:12 -0700
From:	Greg KH <greg@...ah.com>
To:	Oliver Neukum <oliver@...kum.org>
Cc:	Valdis.Kletnieks@...edu, Dave Airlie <airlied@...il.com>,
	Arnd Bergmann <arnd@...db.de>,
	codalist@...emann.coda.cs.cmu.edu,
	ksummit-2010-discuss@...ts.linux-foundation.org,
	autofs@...ux.kernel.org, Jan Harkes <jaharkes@...cmu.edu>,
	Samuel Ortiz <samuel@...tiz.org>, Jan Kara <jack@...e.cz>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	netdev@...r.kernel.org, Anders Larsen <al@...rsen.net>,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	Bryan Schumaker <bjschuma@...app.com>,
	Christoph Hellwig <hch@...radead.org>,
	Petr Vandrovec <vandrove@...cvut.cz>,
	Mikulas Patocka <mikulas@...ax.karlin.mff.cuni.cz>,
	linux-fsdevel@...r.kernel.org,
	Evgeniy Dushistov <dushistov@...l.ru>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Hendry <andrew.hendry@...il.com>,
	linux-media@...r.kernel.org
Subject: Re: [Ksummit-2010-discuss] [v2] Remaining BKL users, what to do

On Tue, Oct 19, 2010 at 09:40:47PM +0200, Oliver Neukum wrote:
> Am Dienstag, 19. Oktober 2010, 21:37:35 schrieb Greg KH:
> > > So no need to clean it up for multiprocessor support.
> > > 
> > > http://download.intel.com/design/chipsets/datashts/29067602.pdf
> > > http://www.intel.com/design/chipsets/specupdt/29069403.pdf
> > 
> > Great, we can just drop all calls to lock_kernel() and the like in the
> > driver and be done with it, right?
> 
> No,
> 
> you still need to switch off preemption.

Hm, how would you do that from within a driver?

thanks,

greg k-h
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