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

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Date:	Thu, 12 Mar 2009 11:54:26 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jan Beulich <jbeulich@...ell.com>
Cc:	tglx@...utronix.de, hpa@...or.com, jeremy.fitzhardinge@...rix.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86-64: fix HYPERVISOR_update_descriptor()


* Jan Beulich <jbeulich@...ell.com> 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-2.6.29-rc7/arch/x86/include/asm/xen/hypercall.h	2009-03-11 17:52:10.000000000 +0100
> +++ 2.6.29-rc7-x86_64-xen-update-descr/arch/x86/include/asm/xen/hypercall.h	2009-02-13 11:41:39.000000000 +0100
> @@ -296,6 +296,8 @@ 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);

missing changelog and Impact line.

	Ingo
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