linux-kernel - Re: [PATCH] x86-64: fix HYPERVISOR_update

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Date:	Tue, 16 Dec 2008 09:55:08 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Jan Beulich <jbeulich@...ell.com>
CC:	mingo@...e.hu, tglx@...utronix.de, linux-kernel@...r.kernel.org,
	hpa@...or.com
Subject: Re: [PATCH] x86-64: fix HYPERVISOR_update_descriptor()

Jan Beulich wrote:
> Signed-off-by: Jan Beulich <jbeulich@...ell.com>
>   

Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>

> ---
>  arch/x86/include/asm/xen/hypercall.h |    2 ++
>  1 file changed, 2 insertions(+)
>
> --- linux-2.6.28-rc8/arch/x86/include/asm/xen/hypercall.h	2008-12-11 14:45:37.000000000 +0100
> +++ 2.6.28-rc8-x86_64-xen-update-descr/arch/x86/include/asm/xen/hypercall.h	2008-12-12 10:25:55.000000000 +0100
> @@ -290,6 +290,8 @@ HYPERVISOR_get_debugreg(int reg)
>  static inline int
>  HYPERVISOR_update_descriptor(u64 ma, u64 desc)
>  {
> +	if (sizeof(u64) == sizeof(long))
> +		return _hypercall2(int, update_descriptor, ma, desc);
>  	return _hypercall4(int, update_descriptor, ma, ma>>32, desc, desc>>32);
>  }
>  
>
>
>
>   

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