linux-kernel - Re: [PATCH] kconfig: untangle EXPERT and EMBEDDED

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Date:	Tue, 17 Jan 2012 12:46:01 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Andrew Jones <drjones@...hat.com>
cc:	Arnd Bergmann <arnd@...db.de>, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, mingo@...e.hu,
	david.woodhouse@...el.com, gregkh@...e.de, davem@...emloft.net,
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	airlied@...ux.ie, jkosina@...e.cz, mchehab@...radead.org,
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Subject: Re: [PATCH] kconfig: untangle EXPERT and EMBEDDED

On Tue, 17 Jan 2012, Andrew Jones wrote:

> Now changing it, i.e. making it conform more closely to its name and only
> affect embedded related options, you can't do. If you were to do so, then
> you would lose backward compatibility. How do you know there aren't users
> that started using EMBEDDED for the non-embedded side effects?

That's why they're now using EXPERT.

> If EMBEDDED
> is ever corrected, and then stops selecting EXPERT, then you risk causing
> them problems.
> 

No, because they've already enabled EXPERT.  You can't have EMBEDDED=y and 
EXPERT=n.  That's what this little thing called "select" does.  After a 
sufficient amount of time passes and all options that are important only 
for embedded users have been either extended for EMBEDDED or replaced only 
be EMBEDDED, you can get rid of the "select" without losing backwards 
compatibility.
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