linux-kernel - Re: [rfc][patch] queued spinlocks (i386)

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Message-ID: <Pine.LNX.4.64.0703231104480.25113@alien.or.mcafeemobile.com>
Date:	Fri, 23 Mar 2007 11:15:02 -0700 (PDT)
From:	Davide Libenzi <davidel@...ilserver.org>
To:	Nick Piggin <npiggin@...e.de>
cc:	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [rfc][patch] queued spinlocks (i386)

On Fri, 23 Mar 2007, Nick Piggin wrote:

> On Fri, Mar 23, 2007 at 11:04:18AM +0100, Ingo Molnar wrote:
> > 
> > * Nick Piggin <npiggin@...e.de> wrote:
> > 
> > > Implement queued spinlocks for i386. [...]
> > 
> > isnt this patented by MS? (which might not worry you SuSE/Novell guys, 
> > but it might be a worry for the rest of the world ;-)
> 
> I never thought a FIFO queue would be patentable.
> 
> Do you have a reference to the patent number?

FWIW, MS patented even the preprocessor in computer languages ;)
Holding a patent does not make it automatically enforceable.
I remember thare was a discussion time ago about queued spinlocks on lkml.



- Davide


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