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xen-devel
Re: [Xen-devel] Re: [PATCH] ia64 build fixes
On Sun, 2006-04-02 at 09:20 +0100, Keir Fraser wrote:
> On 1 Apr 2006, at 22:46, Alex Williamson wrote:
>
> > Here's a patch that enables HYPERVISOR_sched_op() and
> > HYPERVISOR_sched_opt_compat() for ia64. We currently have no users of
> > this call, but there's no harm in enabling it (tested by adding a
> > HYPERVISOR_yield() call to default_idle()). I did notice a problem
> > with
> > the compat interface though, nothing defines __XEN_INTERFACE_VERSION__
> > for the build of xen. We're therefore stuck on interface version
> > 0x00000000 where __HYPERVISOR_sched_op_compat == __HYPERVISOR_sched_op.
>
> Well, it doesn't actually matter right now since Xen itself does not
> use the __HYPERVISOR_foo numbers. But yes, I can see this might bite us
> later so we ought to define it.
I was using them in some debugging code the other day and it bit me :-(
Christian suggested changing xen-compat.h to use the maximum version
when compiling Xen. e.g.
#ifndef __XEN_INTERFACE_VERSION__
#ifdef __XEN__
#define __XEN_INTERFACE_VERSION__ 0xffffffff
#else
#define __XEN_INTERFACE_VERSION__ 0x00000000
#endif
#endif
Ian.
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