Re: [Xen-devel] [patch] ACM ops interface

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 8 Jun 2006, at 16:01, Hollis Blanchard wrote:

> If the ACM ops were always passed in a union, we could replace the 
> first
> switch with a single copy_from_user(), and also guarantee that
> "interface_version" is always in the right place (it's only there
> coincidentally now). What do you think?
The interface was deliberately changed away from that style for 
consistency with other hypercalls. Also to allow larger argument 
structures to be added to the interface later without breaking backward 
compatibility (inflating the size of the union).
 -- Keir


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