linux-kernel - Re: [RFC patch 23/27] Immediate Values - Powerpc Optimization NMI MCE support

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Message-ID: <18438.34621.508450.720068@cargo.ozlabs.ibm.com>
Date:	Thu, 17 Apr 2008 09:09:49 +1000
From:	Paul Mackerras <paulus@...ba.org>
To:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [RFC patch 23/27] Immediate Values - Powerpc Optimization NMI MCE support

Mathieu Desnoyers writes:

> Use an atomic update for immediate values.

What is meant by an "atomic" update in this context?  AFAICS you are
using memcpy, which is not in any way guaranteed to be atomic.

Paul.
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