On Sunday 19 June 2011 13:39:32 Greg Ungerer wrote:

quoted

+#ifdef CONFIG_OF
+static const struct of_device_id fec_dt_ids[] = {
+     { .compatible = "fsl,fec", .data =&fec_devtype[0], },
+     {},
+};
+
+static const struct of_device_id *
+fec_get_of_device_id(struct platform_device *pdev)
+{
+     return of_match_device(fec_dt_ids,&pdev->dev);
+}
+#else
+#define fec_dt_ids NULL
+static inline struct of_device_id *
+fec_get_of_device_id(struct platform_device *pdev)
+{
+     return NULL;
+}
+#endif
+
  static unsigned char macaddr[ETH_ALEN];
  module_param_array(macaddr, byte, NULL, 0);
  MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");

@@ -1363,6 +1385,11 @@ fec_probe(struct platform_device *pdev)
      struct net_device *ndev;
      int i, irq, ret = 0;
      struct resource *r;
+     const struct of_device_id *of_id;
+
+     of_id = fec_get_of_device_id(pdev);

fec_get_of_device_id() is defined inside of "#ifdef CONFIG_OF". This
use of it will break compilation when this is not defined.

Why? Note the #else path defining an empty function.

	Arnd