linux-kernel - Re: [PATCH 01/12] Use mutex instead of semaphore in driver core

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Date:	Wed, 2 Jan 2008 11:06:39 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Dave Young <hidave.darkstar@...il.com>
cc:	Greg KH <gregkh@...e.de>, Peter Zijlstra <peterz@...radead.org>,
	<linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>
Subject: Re: [PATCH 01/12] Use mutex instead of semaphore in driver core

On Wed, 2 Jan 2008, Dave Young wrote:

> > Around a month ago I had a discussion with Peter Zijlstra about the
> > problems in converting the device semaphores to mutexes; you may be
> > able to find it in the LKML archives.  Doing the conversion while
> > keeping lockdep happy is a very hard problem and we were not able to
> > solve it.
> >
> 
> It's unfortunate to know this, I will search and read your thread.

Here's a pointer to that thread:

	http://marc.info/?t=119411942200002&r=1&w=2

Alan Stern

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