linux-kernel - Re: [PATCH 6/6] kconfig option for TRIM_UNUSED

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Message-ID: <87twlhzcku.fsf@rustcorp.com.au>
Date:	Wed, 10 Feb 2016 10:00:25 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Christoph Hellwig <hch@...radead.org>
Cc:	Michal Marek <mmarek@...e.com>, linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org, Al Viro <viro@...IV.linux.org.uk>
Subject: Re: [PATCH 6/6] kconfig option for TRIM_UNUSED_EXPSYMS

Nicolas Pitre <nicolas.pitre@...aro.org> writes:
> On Tue, 9 Feb 2016, Christoph Hellwig wrote:
>
>> On Mon, Feb 08, 2016 at 03:28:35PM -0500, Nicolas Pitre wrote:
>> > The config option to enable it all.
>> 
>> Just enable it by default..
>
> :-)
>
> Viro took the opposite view with this patch:
>
> http://lkml.org/lkml/2016/2/3/1068
>
> where he's ensuring that no exports are dropped, even if obviously 
> they're not used (otherwise some complaints would have come about).  So 
> I'm not sure if having this turned on by default is a good thing.
>
> But I don't mind being convinced otherwise.

People do build out-of-tree modules.  Dropping support for that would
simplify our lives, but seems fairly controversial :)

Cheers,
Rusty.