Re: [tip:x86/hyperv] X86: Handle Hyper-V vmbus interrupts as specialhypervisor interrupts

[Yinghai Lu]

On Tue, Feb 12, 2013 at 7:58 PM, KY Srinivasan <kys@xxxxxxxxxxxxx> wrote:
>
>
>> -----Original Message-----
>> From: H. Peter Anvin [mailto:hpa@xxxxxxxxx]
>> Sent: Tuesday, February 12, 2013 10:55 PM
>> To: KY Srinivasan
>> Cc: Yinghai Lu; mingo@xxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
>> tglx@xxxxxxxxxxxxx; hpa@xxxxxxxxxxxxxxx; linux-tip-commits@xxxxxxxxxxxxxxx
>> Subject: Re: [tip:x86/hyperv] X86: Handle Hyper-V vmbus interrupts as special
>> hypervisor interrupts
>>
>> On 02/12/2013 07:49 PM, KY Srinivasan wrote:
>> >>>
>> >>> The issue was that you could turn on CONFIG_HYPERV without enabling
>> >>> CONFIG_X86_LOCAL_APIC. Peter fixed it.
>> >>>
>> >>
>> >> He is asking why you are using IS_ENABLED() instead of #ifdef.  The
>> >> difference is that IS_ENABLED() works even for modules.
>> >
>> > My mistake!
>> >
>>
>> Well, which one do you need?
>
> I chose the IS_ENABLED() because I wanted to cover the case where HYPERV is configured as a module as well.
>

ok, so when HYPERV is built as module, actually it is partially module
as it put some code built-in already?
if user never load hyperv, those code will never not be used.

Can those code not be put in module _init function?

Thanks

Yinghai
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