linux-kernel - Re: [PATCH 8/9] of/i2c: Resolve interrupt references at probe time

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Date:	Mon, 23 Sep 2013 10:35:09 +0200
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Thierry Reding <thierry.reding@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
	linux-tegra@...r.kernel.org, linux-i2c@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH 8/9] of/i2c: Resolve interrupt references at probe time


> > This function should be in the CONFIG_OF block.
> 
> I'll argue the other way. I think that the whole CONFIG_OF block should
> be remove, or at least be confined to public functions. The reason that
> I've chosen to do it this way is that the i2c_device_probe() uses an
> IS_ENABLED(CONFIG_OF), which will evaluate to 0 if OF isn't selected
> which in turn will cause the compiler to throw away of_i2c_probe()
> because it is static and never used.
> 
> The big advantage of this is that we get compile coverage for these
> functions independent of what configuration is built. The same could
> probably be done for the whole CONFIG_ACPI block. In fact I volunteer to
> provide that patch if I've convinced you that this is actually better
> than sprinking the code with the #ifdef blocks that make it harder than
> necessary to verify that the code builds in all configurations.

Yes, you (easily) did :) Still, I'd like the of_i2c_probe function
near the other of_* functions.

Thanks,

   Wolfram


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