Re: compiler bug gcc4.6/4.7 with ACCESS_ONCE and workarounds

From: Linus Torvalds
Date: Tue Nov 11 2014 - 19:33:57 EST


On Tue, Nov 11, 2014 at 1:16 PM, Christian Borntraeger
<borntraeger@xxxxxxxxxx> wrote:
>
> Are you ok with the patch as is in kvm/next for the time being or shall
> we revert that and replace it with the .val scheme?

Is that the one that was quoted at the beginning of the thread, that
uses barrier()?

I guess as a workaround it is fine, as long as we don't lose sight of
trying to eventually do a better job.

Linus
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