From: Arjan van de Ven <arjan@infradead.org>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: John Kacur <jkacur@redhat.com>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@elte.hu>,
Christoph Hellwig <hch@infradead.org>,
Jonathan Corbet <corbet@lwn.net>,
Andrew Morton <akpm@linux-foundation.org>,
Vincent Sanders <vince@simtec.co.uk>,
linux-scsi@vger.kernel.org
Subject: Re: [PATCH RFC] [PATCH] drivers/scsi/ch.c: Remove BKL in ch_open
Date: Sun, 11 Oct 2009 09:03:13 -0700 [thread overview]
Message-ID: <20091011090313.1b8f0eb1@infradead.org> (raw)
In-Reply-To: <20091011165408.51d4f413@lxorguk.ukuu.org.uk>
On Sun, 11 Oct 2009 16:54:08 +0100
Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> > > I'm not so sure. In fact there are some quite umm interesting
> > > questions about this code, and some of them are shared with other
> > > modules too.
> > >
> > > Consider the following sequence
> > >
> > > CPU1 CPU2
> > > register_chrdev
> > > ok
> > > open device
> > > takes lock
> >
> >
> > but open does not take the BKL, so the BKL is not protecting you at
> > all against this..
>
> But module load/unload does
it does?
looking at the code.... so far failing to find where.
--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
visit http://www.lesswatts.org
next prev parent reply other threads:[~2009-10-11 16:03 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-11 13:45 John Kacur
2009-10-11 14:37 ` Alan Cox
2009-10-11 15:29 ` Arjan van de Ven
2009-10-11 15:54 ` Alan Cox
2009-10-11 16:03 ` Arjan van de Ven [this message]
2009-10-11 16:14 ` Alan Cox
2009-10-11 16:19 ` Arjan van de Ven
2009-10-11 17:09 ` Jonathan Corbet
2009-10-12 13:03 ` Stefan Richter
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