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

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Message-ID: <469F8784.3030700@linux.intel.com>
Date:	Thu, 19 Jul 2007 08:47:16 -0700
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	"Robert P. J. Day" <rpjday@...dspring.com>
CC:	Stefan Richter <stefanr@...6.in-berlin.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: does CONFIG_UNUSED_SYMBOLS have any value anymore?

Robert P. J. Day wrote:
> On Thu, 19 Jul 2007, Arjan van de Ven wrote:
> 
>> 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?
>> it's one of those pieces of infrastructure that get used from time
>> to time to phase out symbol exports... we should be more agressive
>> about that; about 1/3rd of the exports is not used by anything in
>> linux, yet each symbol costs about 100 bytes of memory at runtime.
> 
> ok, so maybe its removal file entry should be deleted if it's going to
> hang around.  your call.
> 

the removal entry is/was for the symbols *marked*, not for the 
infrastructure....
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