netdev - Re: [PATCH] Make FC, FDDI, HIPPI and TR tristate

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Date:	Sat, 29 Dec 2007 00:19:53 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	jengelh@...putergmbh.de
Cc:	bunk@...nel.org, jgarzik@...ox.com, netdev@...r.kernel.org
Subject: Re: [PATCH] Make FC, FDDI, HIPPI and TR tristate

From: Jan Engelhardt <jengelh@...putergmbh.de>
Date: Sat, 29 Dec 2007 01:41:23 +0100 (CET)

> 
> On Dec 29 2007 02:09, Adrian Bunk wrote:
> >On Sat, Dec 29, 2007 at 12:45:12AM +0100, Jan Engelhardt wrote:
> >> Turn CONFIG_FC, CONFIG_FDDI, CONFIG_HIPPI and CONFIG_TR into tristate
> >> so they can be built as modules. This will allow CONFIG_LLC to be
> >> built as a module too, overall reducing the core kernel image size.
> >>...
> >
> >Just an example of code you have to fix if you do this:
> >
> >$ grep -r "#ifdef CONFIG_TR" net/
> 
> Ah, thank you for reminding me. For lec.c, would it be ok to do
> 
> #if defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
> #	define WITH_TR 1
> #endif

We don't have a WITH_IPV6, we open code the ifdef check
all over the tree.

For consistency you should do that here too.  Please don't
add new ad-hoc macros to deal with situations like this.
If it's really a problem it should be handled globally in
the confines of the config system, not on a case-by-case
basis.
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