Devicetree

* Re: [PATCH] of: Export __of_find_all_nodes()
From: Alexander Sverdlin @ 2017-01-19  9:43 UTC (permalink / raw)
  To: Frank Rowand; +Cc: Rob Herring, devicetree-u79uwXL29TY76Z2rM5mHXA
In-Reply-To: <587FDF1B.1060206-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

Hi!

On 18/01/17 22:33, Frank Rowand wrote:
>> This is necessary for for_each_of_allnodes() to work in the modules.
>>
>> Signed-off-by: Alexander Sverdlin <alexander.sverdlin-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org>
>> Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
>> Cc: Frank Rowand <frowand.list-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>> Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
>> ---
>>  drivers/of/base.c | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/of/base.c b/drivers/of/base.c
>> index 2eb4dea62b84..f576c33e0b84 100644
>> --- a/drivers/of/base.c
>> +++ b/drivers/of/base.c
>> @@ -270,6 +270,7 @@ struct device_node *__of_find_all_nodes(struct device_node *prev)
>>  	}
>>  	return np;
>>  }
>> +EXPORT_SYMBOL_GPL(__of_find_all_nodes);
>>  
>>  /**
>>   * of_find_all_nodes - Get next node in global list
>>
> Quoting Rob from the last request for this:
> 
> "What driver needs this? This isn't really a function I'd expect drivers to use."

This one and the one from previous patch/mail are used in a module which reads DT overlays
from pluggable extension boards, eventually performs some sanity checks/corrections and
applies these overlays. This eventual corrections require low-level access to DT.

I cannot judge, how relevant this usecase is for the community, but I was driven by the fact,
that the functions which require the functions I export are defined statically in .h files
and therefore are exposed to the modules.

-- 
Best regards,
Alexander Sverdlin.
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