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From: Avi Kivity <avi@redhat.com>
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Subject: Re: [PATCH] PPC: Sync guest visible MMU state
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On 11/26/2009 02:46 PM, Alexander Graf wrote:
>
>> Please avoid unnamed unions in user-visible headers - they're a gcc
>> extension.
>>
>> Yes, we have them elsewhere, but let's not add to the pile.
>>      
> I'm open to scalable suggestions that don't break existing userspace code.
> If I name the union now, existing qemu code will break. If I align the
> pad array manually I'll definitely mess up something.
>    

You can keep pvr out of the (named) union.

-- 
error compiling committee.c: too many arguments to function