linux-kernel - Re: [PATCH] of_net.h: Provide dummy functions if OF

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Date:	Mon, 01 Apr 2013 14:14:10 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Guenter Roeck <linux@...ck-us.net>
CC:	linux-kernel@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Rob Herring <rob.herring@...xeda.com>,
	David Daney <david.daney@...ium.com>
Subject: Re: [PATCH] of_net.h: Provide dummy functions if OF_NET is not configured

On 04/01/2013 02:01 PM, Guenter Roeck wrote:
> On Mon, Apr 01, 2013 at 01:44:24PM -0500, Rob Herring wrote:
>> On 04/01/2013 01:19 PM, Guenter Roeck wrote:
>>> of_get_mac_address() and of_get_phy_mode() are only provided if OF_NET
>>> is configured. While most callers check for the define, not all do, and those
>>> who do require #ifdef around the code. For those who don't, the missing check
>>> can result in errors such as
>>
>> How about removing the ifdef from those callers?
>>
> That would be the next step, after/if this one is accepted.
> If not, it doesn't make sense to waste my time.

Assuming that is done:

Acked-by: Rob Herring <rob.herring@...xeda.com>

Presumably with the follow-on patches, this can go in thru the net tree.

Rob

> Thanks,
> Guenter
> 
>> Rob
>>
>>>
>>> arch/powerpc/sysdev/tsi108_dev.c:107:3: error: implicit declaration of
>>> 	function 'of_get_mac_address' [-Werror=implicit-function-declaration]
>>> arch/powerpc/sysdev/mv64x60_dev.c:253:2: error: implicit declaration of
>>> 	function 'of_get_mac_address' [-Werror=implicit-function-declaration]
>>>
>>> Provide dummy function declarations if OF_NET is not configured. This is safe
>>> because all callers do check the return values. If desired, at least some of
>>> the #ifdefs in the code can subsequently be removed.
>>>
>>> Cc: David Daney <david.daney@...ium.com>
>>> Signed-off-by: Guenter Roeck <linux@...ck-us.net>
>>> ---
>>>  include/linux/of_net.h |   10 ++++++++++
>>>  1 file changed, 10 insertions(+)
>>>
>>> diff --git a/include/linux/of_net.h b/include/linux/of_net.h
>>> index f474641..61bf53b 100644
>>> --- a/include/linux/of_net.h
>>> +++ b/include/linux/of_net.h
>>> @@ -11,6 +11,16 @@
>>>  #include <linux/of.h>
>>>  extern const int of_get_phy_mode(struct device_node *np);
>>>  extern const void *of_get_mac_address(struct device_node *np);
>>> +#else
>>> +static inline const int of_get_phy_mode(struct device_node *np)
>>> +{
>>> +	return -ENODEV;
>>> +}
>>> +
>>> +static inline const void *of_get_mac_address(struct device_node *np)
>>> +{
>>> +	return NULL;
>>> +}
>>>  #endif
>>>  
>>>  #endif /* __LINUX_OF_NET_H */
>>>
>>
>>

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