linux-kernel - Re: [PATCH RESEND] i2c: move of helpers into the core

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Date:	Mon, 19 Aug 2013 21:46:04 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Wolfram Sang <wsa@...-dreams.de>
Cc:	linux-i2c@...r.kernel.org, linux-acpi@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org,
	davinci-linux-open-source@...ux.davincidsp.com,
	linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org, linux-tegra@...r.kernel.org,
	linux-media@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH RESEND] i2c: move of helpers into the core

On Mon, Aug 19, 2013 at 07:59:40PM +0200, Wolfram Sang wrote:
[...]
> diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
[...]
> +#if IS_ENABLED(CONFIG_OF)
> +static void of_i2c_register_devices(struct i2c_adapter *adap)
> +{
[...]
> +}
[...]
> +#endif /* CONFIG_OF */

Isn't this missing the dummy implementation for !OF.

>  static int i2c_do_add_adapter(struct i2c_driver *driver,
>  			      struct i2c_adapter *adap)
>  {
> @@ -1058,6 +1160,8 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
>  
>  exit_recovery:
>  	/* create pre-declared device nodes */
> +	of_i2c_register_devices(adap);

Alternatively you could remove the of_i2c_register_devices() from the
"#ifdef CONFIG_OF" block so that it will always be compiled. You could
turn the above into

	if (IS_ENABLED(CONFIG_OF))
		of_i2c_register_devices(adap);

and let the compiler throw the static function away if it sees that the
condition is always false.

Thierry

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