linux-kernel - Re: Is BIT() in arch/x86/include/uapi/asm/kvm.h defined? Where?

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Message-ID: <20160509152502.GB12472@potion>
Date:	Mon, 9 May 2016 17:25:02 +0200
From:	Radim Krčmář <rkrcmar@...hat.com>
To:	Paolo Bonzini <pbonzini@...hat.com>
Cc:	Borislav Petkov <bp@...e.de>, Brooks Moses <bmoses@...gle.com>,
	linux-kernel@...r.kernel.org, Ian Kasprzak <iankaz@...gle.com>
Subject: Re: Is BIT() in arch/x86/include/uapi/asm/kvm.h defined? Where?

2016-05-09 17:15+0200, Paolo Bonzini:
> On 09/05/2016 16:47, Radim Krčmář wrote:
>> 2016-05-09 16:00+0200, Paolo Bonzini:
>>> On 05/05/2016 10:24, Borislav Petkov wrote:
>>>> On Wed, May 04, 2016 at 05:49:27PM -0700, Brooks Moses wrote:
>>>>> When I run "make ARCH=x86 headers_install", and then write a simple C
>>>>> file that #includes "asm/kvm.h" from the resulting tree, I get a
>>>>> compiler error: the BIT() macro used on line 219 of that file is
>>>>> undefined:
>>>>
>>>> The below patch should help...
>>>>
>>>> @Paulo: btw, any chance we can fix that "signifcant" typo :-) in
>>>> KVM_CPUID_FLAG_SIGNIFCANT_INDEX or is it user-visible and cast in
>>>> stone?
>>>
>>> Unfortuntely it is cast in stone.  The patch below is good though.
>> 
>> We can "fix" it by introducing a second name for the entry.  Do you
>> think it's worth?
> 
> I don't think so, but perhaps there are precedents for doing that?

I can't think of any, and it seems pointless to me ...