Re: [Xen-devel] [PATCH] tools/libxc: make volatile keyword for bitmap operations optional

[Olaf Hering <olaf@xxxxxxxxx>]

On Mon, Jan 30, Keir Fraser wrote:

> On 30/01/2012 09:10, "Olaf Hering" <olaf@xxxxxxxxx> wrote:
> > Will gcc use the right thing if the array is passed to the hyperviso,
> > and will it reload everything after the hypercall? If yes, the volatile
> > can indeed go.
> 
> Of course. Lots of things would fail to work if calls to outside the current
> linkage unit didn't flush/invalidate cached shared-data accesses. That's a
> fundamental C compiler thing.

You are right, after thinking about it I came to the same conclusion.
I will send an updated patch.

Olaf

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