Re: [PATCH] Adding a support for Skyworks SKY81452

On Thu, Aug 07, 2014 at 02:34:39PM +0200, Tobias Klauser wrote:

On 2014-08-07 at 10:05:38 +0200, Gyungoh Yoo [off-list ref] wrote:

[...]

quoted

+#ifdef CONFIG_OF
+static const struct of_device_id sky81452_of_match[] = {
+	{.compatible = "sky,sky81452",},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, sky81452_of_match);
+#endif

The #ifdefery here is not needed since you use of_match_ptr below, whcih
will expand to NULL of CONFIG_OF is not set.

On the contrary, that's exactly why the #ifdef is needed here. If you
don't guard the OF match table here, then of_match_ptr() evaluating to
NULL will cause the table to become unused and the compiler warning
about it.

Thierry