linux-kernel - Re: KVM: Export include/linux/kvm.h only if $ARCH actually supports KVM

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Date:	Wed, 13 Feb 2008 21:34:50 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Avi Kivity <avi@...ranet.com>
Cc:	Olaf Hering <olaf@...fle.de>, linux-kernel@...r.kernel.org
Subject: Re: KVM: Export include/linux/kvm.h only if $ARCH actually supports KVM

On Wed, Feb 13, 2008 at 09:43:49AM +0200, Avi Kivity wrote:
> Olaf Hering wrote:
> >>Currently, make headers_check barfs due to <asm/kvm.h>, which 
> >><linux/kvm.h>
> >>includes, not existing.  Rather than add a zillion <asm/kvm.h>s, export 
> >>kvm.h
> >>only if the arch actually supports it.
> >>    
> >
> >This makes headers_install_all unreliable.
> >linux/kvm.h will not be exported, depending on what system the libc
> >headers will be generated. 
> 
> I see.  Any suggestions besides adding lots of asm-*/kvm.h?

Do not include asm/kvm.h from linux/kvm.h.
And in the few places where it is needed explicit include asm/kvm.h before
linux/kvm.h.

Alternatively inlcude asm/kvm.h inside #ifdef KERNEL"
so only userspace has to do explicit include of asm before linux variant.

	Sam
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