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Date: Fri, 15 Mar 2002 17:46:15 -0800
From: Mike Fedyk <mfedyk@matchmail.com>
To: yodaiken@fsmlabs.com
Cc: Robert Love <rml@tech9.net>, Mikael Pettersson <mikpe@csd.uu.se>,
        linux kernel <linux-kernel@vger.kernel.org>
Subject: Re: 2.4.18 Preempt Freezeups
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On Fri, Mar 15, 2002 at 05:40:36PM -0700, yodaiken@fsmlabs.com wrote:
> On Fri, Mar 15, 2002 at 02:11:49PM -0500, Robert Love wrote:
> > If you "poke the processor", to be SMP-safe, you should hold a lock to
> > prevent multiple concurrent "pokings of the processor" - thus you become
> > preempt-safe.
> 
> Without preempt:
> 	x = movefrom processor register;
>         do_something with x
> 
> is safe in SMP
> With SMP it requires a lock.
>

"With preempt it requires a lock" you mean?
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