Ingo Molnar wrote:
quoted text
> * Arjan van de Ven <arjan@linux.intel.com> wrote:
>
>   
>> +#define WARN_ON(condition) do_warn_on((unsigned long)(condition), __FILE__, \
>> +					 __LINE__, __FUNCTION__)
>>     
>
> hm. This passes in 4 arguments to do_warn_on().
>
> i think we could get away with no arguments (!), by using section 
> tricks. Firstly, we can get rid of __FUNCTION__ and replace it with a 
> ksyms lookup - that is fine enough. Secondly, we could put __FILE__ and 
> __LINE__ into a text section and key it up to the return address from 
> do_warn_on().
>   

BUG_ON already does this, and WARN_ON can reuse all the same machinery.

    J
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