linux-kernel - Re: [PATCH] ipmi: add of_device_id in MODULE_DEVICE

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Date:	Wed, 26 Aug 2015 09:57:38 -0500
From:	Corey Minyard <minyard@....org>
To:	"Singh, Brijeshkumar" <Brijeshkumar.Singh@....com>,
	"openipmi-developer@...ts.sourceforge.net" 
	<openipmi-developer@...ts.sourceforge.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ipmi: add of_device_id in MODULE_DEVICE_TABLE

On 08/25/2015 09:50 AM, Singh, Brijeshkumar wrote:
> Hi Corey,
>
> Just tried the patch on 4.2-rc8 and it seem to build just fine
>
> * make x86_64_defconfig + enable IPMI module as "m"   - Build OK
> * make allyesconfig - Build OK
> * make allmodconfig - Build OK
>
> Please let me know if  I am missing something otherwise send me your config and will try to root cause the issue. 
> Optionally, if you are okay then I can guard  MODULE_DEVICE_TABLE(of, ipmi_match) changes with #if CONFIG_OF to ensure that code does not get build for non device-tree platform.

I have a patch queued that reworks the probing a bit, and it affected
this code.  I had to move the change into the CONFIG_OF ifdef and change
the name.  Sorry this took so long, I just didn't have time to look at it.

I have queued the change, and it will be in linux-next soon, if you want
to check it.

-corey

> -Brijesh 
>
>> -----Original Message-----
>> From: Corey Minyard [mailto:tcminyard@...il.com] On Behalf Of Corey
>> Minyard
>> Sent: Monday, August 24, 2015 7:49 PM
>> To: Singh, Brijeshkumar; openipmi-developer@...ts.sourceforge.net; linux-
>> kernel@...r.kernel.org
>> Subject: Re: [PATCH] ipmi: add of_device_id in MODULE_DEVICE_TABLE
>>
>> Well, I should have compile tested first.  On x86_64:
>>
>>
>>   CC [M]  drivers/char/ipmi/ipmi_si_intf.o In file included from
>> ../drivers/char/ipmi/ipmi_si_intf.c:42:0:
>> ../drivers/char/ipmi/ipmi_si_intf.c:2804:25: error: 'ipmi_match'
>> undeclared here (not in a function)
>>  MODULE_DEVICE_TABLE(of, ipmi_match);
>>                          ^
>> ../include/linux/module.h:223:21: note: in definition of macro
>> 'MODULE_DEVICE_TABLE'
>>  extern const typeof(name) __mod_##type##__##name##_device_table  \
>>                      ^
>> ../include/linux/module.h:223:27: error:
>> '__mod_of__ipmi_match_device_table' aliased to undefined symbol
>> 'ipmi_match'
>>  extern const typeof(name) __mod_##type##__##name##_device_table  \
>>                            ^
>> ../drivers/char/ipmi/ipmi_si_intf.c:2804:1: note: in expansion of macro
>> 'MODULE_DEVICE_TABLE'
>>  MODULE_DEVICE_TABLE(of, ipmi_match);
>>
>>
>> This has to compile on all arches.  I'm not sure what is wrong, but I've removed
>> the patch.
>>
>> -corey
>>
>> On 08/24/2015 09:15 AM, Brijesh Singh wrote:
>>> Fix autoloading ipmi modules when using device tree.
>>>
>>> Signed-off-by: Brijesh Singh <brijeshkumar.singh@....com>
>>> ---
>>>  drivers/char/ipmi/ipmi_si_intf.c | 1 +
>>>  1 file changed, 1 insertion(+)
>>>
>>> diff --git a/drivers/char/ipmi/ipmi_si_intf.c
>>> b/drivers/char/ipmi/ipmi_si_intf.c
>>> index 8a45e92..cddc7b0 100644
>>> --- a/drivers/char/ipmi/ipmi_si_intf.c
>>> +++ b/drivers/char/ipmi/ipmi_si_intf.c
>>> @@ -2785,6 +2785,7 @@ static struct platform_driver ipmi_driver = {
>>>  	.probe		= ipmi_probe,
>>>  	.remove		= ipmi_remove,
>>>  };
>>> +MODULE_DEVICE_TABLE(of, ipmi_match);
>>>
>>>  #ifdef CONFIG_PARISC
>>>  static int ipmi_parisc_probe(struct parisc_device *dev)

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