Re: [PATCH 1/4] x86/cpufeature: Add User-Mode Instruction Prevention definitions

[Andy Lutomirski]

On Tue, Nov 8, 2016 at 8:25 PM, Ricardo Neri
<ricardo.neri-calderon@xxxxxxxxxxxxxxx> wrote:
> On Tue, 2016-11-08 at 07:32 -0800, Andy Lutomirski wrote:
>> > diff --git a/arch/x86/include/asm/disabled-features.h
>> b/arch/x86/include/asm/disabled-features.h
>> > index 85599ad..4707445 100644
>> > --- a/arch/x86/include/asm/disabled-features.h
>> > +++ b/arch/x86/include/asm/disabled-features.h
>> > @@ -16,6 +16,12 @@
>> >  # define DISABLE_MPX   (1<<(X86_FEATURE_MPX & 31))
>> >  #endif
>> >
>> > +#ifdef CONFIG_X86_INTEL_UMIP
>>
>> ^^^^^
>>
>> What's this?
>>
>> Let's try to do this with a minimum of configuration.
>
> My intention here is put in this file all the #if build configurations
> so that I don't have to put them other files by using functions such as
> cpu_feature_enable. Isn't this the intention of this file?

What I mean is: why does this need a config option at all?

--Andy