linux-kernel - Re: x86: Make Atom PMC driver configurable.

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Message-ID: <20141015172030.6bb3c522@alan.etchedpixels.co.uk>
Date:	Wed, 15 Oct 2014 17:20:30 +0100
From:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
To:	Dave Jones <davej@...hat.com>
Cc:	Felipe Balbi <balbi@...com>,
	Linux Kernel <linux-kernel@...r.kernel.org>, x86@...nel.org,
	aubrey.li@...ux.intel.com
Subject: Re: x86: Make Atom PMC driver configurable.

On Wed, 15 Oct 2014 10:59:24 -0400
Dave Jones <davej@...hat.com> wrote:

> On Wed, Oct 15, 2014 at 09:52:45AM -0500, Felipe Balbi wrote:
>  > Hi,
>  > 
>  > On Wed, Oct 15, 2014 at 10:46:03AM -0400, Dave Jones wrote:
>  > > The Atom PMC driver is always built-in, regardless of whether
>  > > the kernel being built is going to be run on an Atom (or even Intel) CPU.
>  > > 
>  > > Signed-off-by: Dave Jones <davej@...hat.com>
>  > > 
>  > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
>  > > index f2327e88e07c..04280177c1e2 100644
>  > > --- a/arch/x86/Kconfig
>  > > +++ b/arch/x86/Kconfig
>  > > @@ -2485,7 +2485,7 @@ config X86_DMA_REMAP
>  > >  	depends on STA2X11
>  > >  
>  > >  config PMC_ATOM
>  > > -	def_bool y
>  > > +	tristate "Intel Atom SOC power management controller driver"
>  > 
>  > looks like you should still have this as default y just to make sure you
>  > a simple defconfig still enables this as it did before.
>  
> I could, but why should this be default y ? There's no real
> justification to inflict this on everyone, given atom is at best
> a niche area of x86.

Possibly because you work for an enterprise vendor. Atom is not remotely
niche to everyone else.

This really does want to be a default Y for X86 at least, although I can
see that for the enterprise market you probably don't care quite so much
right now. Without that you are going to break a lot of users
configurations in a deeply surprising way.

Alan
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