linux-kernel - Re: [PATCH 2/3] net/fec: add device tree support

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Message-ID: <4DFE8ED1.3050007@snapgear.com>
Date:	Mon, 20 Jun 2011 10:05:37 +1000
From:	Greg Ungerer <gerg@...pgear.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	Shawn Guo <shawn.guo@...aro.org>, <patches@...aro.org>,
	<netdev@...r.kernel.org>, <devicetree-discuss@...ts.ozlabs.org>,
	Jason Liu <jason.hui@...aro.org>,
	<linux-kernel@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 2/3] net/fec: add device tree support

On 19/06/11 22:11, Arnd Bergmann wrote:
> On Sunday 19 June 2011 13:39:32 Greg Ungerer wrote:
>>> +#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.

Sorry, missed that :-)

Regards
Greg


------------------------------------------------------------------------
Greg Ungerer  --  Principal Engineer        EMAIL:     gerg@...pgear.com
SnapGear Group, McAfee                      PHONE:       +61 7 3435 2888
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