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

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Date:	Thu, 12 Mar 2009 11:25:34 +0000
From:	"Jan Beulich" <jbeulich@...ell.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	<jeremy.fitzhardinge@...rix.com>, <tglx@...utronix.de>,
	<linux-kernel@...r.kernel.org>, <hpa@...or.com>
Subject: Re: [PATCH] x86-64: fix HYPERVISOR_update_descriptor()

>>> Ingo Molnar <mingo@...e.hu> 12.03.09 11:54 >>>
>* 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.

I'm confused: What point is there to add a textual description that matches
the subject? And where is the need for an impact line documented (clearly
neither SubmitChecklist no SubmittingPatches have any occurrence of the
word impact), i.e. what are the valid values to chose from?

Jan

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