linux-kernel - Re: does CONFIG_UNUSED_SYMBOLS have any value anymore?

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Message-ID: <Pine.LNX.4.64.0707191131040.7047@localhost.localdomain>
Date:	Thu, 19 Jul 2007 11:32:26 -0400 (EDT)
From:	"Robert P. J. Day" <rpjday@...dspring.com>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Arjan van de Ven <arjan@...ux.intel.com>
Subject: Re: does CONFIG_UNUSED_SYMBOLS have any value anymore?

On Thu, 19 Jul 2007, Stefan Richter wrote:

> Robert P. J. Day wrote:
> ...
> > it's not clear if that means that it was a *one-time* transition
> > aid which is now unnecessary, or whether it's an *ongoing* aid which
> > might be used at any time.  currently, there are no invocations of
> > EXPORT_UNUSED_SYMBOL[_GPL] anywhere in the tree.  so does that mean
> > this feature can be tossed?  or might it still be used every so often?
>
> git-blame (or qgit, which I actually used) points from this part of
> lib/Kconfig.debug to the following chunk in
> Documentation/feature-removal-schedule.txt:
>
> What:	Unused EXPORT_SYMBOL/EXPORT_SYMBOL_GPL exports
> 	(temporary transition config option provided until then)
> 	The transition config option will also be removed at the same time.
> When:	before 2.6.19
> Why:	Unused symbols are both increasing the size of the kernel binary
> 	and are often a sign of "wrong API"
> Who:	Arjan van de Ven <arjan@...ux.intel.com>

argh.  i should have checked there first.  sorry for the noise.  i can
patch that baby out unless arjan wants to do it.

rday
-- 
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA

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