On Tue, 2015-06-23 at 11:33 +0200, Paolo Bonzini wrote:
> On 19/06/2015 09:21, Michael Ellerman wrote:
> > diff --git a/powerpc/spapr.h b/powerpc/spapr.h
> > index 0537f881c0e4..7a377d093ef4 100644
> > --- a/powerpc/spapr.h
> > +++ b/powerpc/spapr.h
> > @@ -16,17 +16,32 @@
> >  
> >  #include <inttypes.h>
> >  
> > -/* We need some of the H_ hcall defs, but they're __KERNEL__ only. */
> > -#define __KERNEL__
> > -#include <asm/hvcall.h>
> > -#undef __KERNEL__
> > -
> 
> This thing is exactly why I think kvmtool's life in the kernel tree was
> harmful.

Harmful is a bit of an overstatement. Though I agree that was a bit of a hack.

> Why wasn't instead H_* just moved to a uapi/ header?!?!?  Can you do
> that now?

Because it's not part of the kernel API, never was, still isn't.

It *is* part of the hypervisor API, but it's not Linux's job to export that and
deal with the fallout if it was ever changed.

cheers


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