linux-kernel - Re: [PATCHv2 1/3] net: phy: prevent linking breakage

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Date:	Tue, 04 Jun 2013 19:17:59 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Florian Fainelli <florian@...nwrt.org>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Russell King <linux@....linux.org.uk>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	"alexandre.belloni" <alexandre.belloni@...e-electrons.com>,
	kernel <kernel@...gutronix.de>,
	"shawn.guo" <shawn.guo@...aro.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCHv2 1/3] net: phy: prevent linking breakage

On Tuesday 04 June 2013 17:09:26 Florian Fainelli wrote:
> You would just need to define a stub for your arch_foo_phy_fixup()
> which has a different definition depending on whether CONFIG_PHYLIB is
> defined or not.

Yes, same thing. For a function that is called in only one place,
I would always prefer if(IS_ENABLED()) over a stub though.

> This would be just one function, instead of the whole bunch of stubs
> needed for phylib. Right now its probably 1 vs 3, so it does not make
> that much of a difference but who knows, if we had more phylib stubs
> and forget to update the stubs? (which tends to happen pretty often).
> 
> The size savings are exactly the same in both approaches anyway.

So should we just stick to the current method then and use
if (IS_ENABLED(CONFIG_NET)) for calling the function?

	Arnd
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