Re: bit fields && data tearing

From: Michael Cree
Date: Fri Sep 05 2014 - 16:42:05 EST

On Fri, Sep 05, 2014 at 04:14:48PM -0400, Peter Hurley wrote:
> Second, in the body of the document:
> "The Linux kernel no longer supports pre-EV56 Alpha CPUs, because these
> older CPUs _do not provide_ atomic one-byte and two-byte loads and stores."

Let's be clear here, the pre-EV56 Alpha CPUs do provide an atomic
one-byte and two-byte load and store; it's just that one must use
locked load and store sequences to achieve atomicity. The point,
I think, is that the pre-EV56 Alpha CPUs provide non-atomic one-byte
and two-byte load and stores as the norm, and that is the problem.

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