linux-kernel - Re: [Question] Why CONFIG

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Message-ID: <20140609074934.GB15826@ravnborg.org>
Date:	Mon, 9 Jun 2014 09:49:35 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Masahiro Yamada <yamada.m@...panasonic.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-kbuild@...r.kernel.org
Subject: Re: [Question] Why CONFIG_SHELL

On Mon, Jun 09, 2014 at 02:04:12PM +0900, Masahiro Yamada wrote:
> Hi experts.
> 
> I think all the macros with CONFIG_ prefix are supposed to be
> defined in Kconfig.
> But I've been long wondering why there exists one exception:
> CONFIG_SHELL.
> 
> Is there any historical, or special reason?
It has been like this as far back as I remmeber.
I assume that one has planned to set the shell in Kconfig back then.
 
> Is it good to rename it to KBUILD_SHELL or something else?
Please do so, to free up the CONFIG_ namespace.

I the end Michal will decide if he want this cleanup.
On the top of my head I see no problems in doing this,
but maybe there are some out-of-tree modules or similar
we need to consider...

	Sam
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