linux-kernel - Re: [PATCH] modules: add default loader hook implementations

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Date:	Sat, 25 Jun 2011 15:08:49 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Jonas Bonn <jonas@...thpole.se>
Cc:	Ingo Molnar <mingo@...e.hu>, rusty@...tcorp.com.au,
	linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
	monstr@...str.eu, cmetcalf@...era.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] modules: add default loader hook implementations

On Saturday 25 June 2011, Jonas Bonn wrote:
> On Sat, 2011-06-25 at 12:04 +0200, Ingo Molnar wrote:
> > Also, and more importantly, don't we generally do such things via 
> > __weak aliases, because the result looks cleaner and needs no changes 
> > for architectures beyond the removal of the generic functions? We 
> > have excluded broken toolchains that miscompile/mislink __weak IIRC 
> > so __weak ought to work.
> 
> When we discussed this briefly yesterday, both Rusty and Arnd showed a
> preference for not using __weak aliases... I'll leave it to them to
> comment further.
> 
> The alternative patch that just provides __weak implementations for
> these hooks is much less invasive than the patch I sent, effectively
> touching only kernel/module.c
> 
> Let me know which is preferable.

I don't care much either way, you would get my Ack for both solutions.
The __weak approach would definitely make a simpler patch, and the
patch you sent adds extra complexity because of the
asm_generic_moduleloader_hooks macro you used to avoid having to
change all other architectures.

	Arnd
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