linux-kernel - Re: Difference between atomic operations and memory barriers

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Date:	Tue, 27 Oct 2009 11:21:12 +0100
From:	Michael Schnell <mschnell@...ino.de>
To:	"Leonidas ." <leonidas137@...il.com>
CC:	Stefan Richter <stefanr@...6.in-berlin.de>,
	Noah Watkins <noah@...hdesu.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Difference between atomic operations and memory barriers

Leonidas . wrote:
> 
> any_t *ptr = something;
> 
> is always atomic even on SMPs without using locks, barriers then my
> doubt is cleared. Thanks.

I assume that this only holds if the pointer (not the thing it points
to) is denoted as volatile.

-Michael
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