Re: request_8xxirq

From: Tiago Dall'Agnol <tdallagnol@parks•com.br>
To: Alex Zeffertt <ajz@cambridgebroadband•com>
Cc: linuxppc-embedded@ozlabs•org
Subject: Re: request_8xxirq
Date: Fri, 29 Jul 2005 14:01:21 -0300	[thread overview]
Message-ID: <42EA60E1.7040804@parks.com.br> (raw)
In-Reply-To: <20050729154359.1ac8f488.ajz@cambridgebroadband.com>

I'm using kernel 2.4.18, and I can see the code you posted.

But this code doesn't help to find request_8xxirq. It just do the 
opposite. This code defines request_irq to be request_8xxirq when 
CONFIG_8xx is defined. But where is located the implementation of 
request_8xxirq?

Am I wrong? I didn't understand when that function request_irq is used.

Thanks
Tiago

Alex Zeffertt wrote:

>Maybe you're using a really old kernel.  In linux-2.4.4 it's in
>arch/ppc/kernel/irq.c:
>
>-- snip --
>#if (defined(CONFIG_8xx) || defined(CONFIG_8260))
>/* Name change so we can catch standard drivers that potentially mess up
> * the internal interrupt controller on 8xx and 8260.  Just bear with me,
> * I don't like this either and I am searching a better solution.  For
> * now, this is what I need. -- Dan
> */
>#define request_irq	request_8xxirq
>
>...
>...
>...
>
>int request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
>	unsigned long irqflags, const char * devname, void *dev_id)
>{
>--/snip --
>
>
>I don't know why it was done like this....
>
>Alex
>
>
>On Fri, 29 Jul 2005 10:52:33 -0300
>"Tiago Dall'Agnol" <tdallagnol@parks•com.br> wrote:
>
>  
>
>>Thank you Alex.
>>
>>But in my linux, this is different.
>>What I have in that file is just
>>
>>extern int request_8xxirq(unsigned int irq,
>>               void (*handler)(int, void *, struct pt_regs *),
>>               unsigned long flags,
>>               const char *device,
>>               void *dev_id);
>>
>>And the request_8xxirq is declared as a
>>
>>EXPORT_SYMBOL(request_8xxirq);
>>
>>in arch/ppc/kernel/ppc_ksyms.c.
>>
>>I already tried to find out where the code that implements the function 
>>is located, but it seems that it doesn't exist in my distribuction. 
>>Maybe is it a "binary version"?
>>
>>Any other information will be apreciated ;-)
>>
>>Best Regards,
>>Tiago
>>
>>Alex Zeffertt wrote:
>>
>>    
>>
>>>In linux-2.4 it's in 
>>>
>>>	include/asm-ppc/mpc8xx.h
>>>
>>>-- snip --
>>>#define request_8xxirq request_irq
>>>--/snip --
>>>
>>>And request_irq is in arch/ppc/kernel/irq.c
>>>
>>>Alex
>>>
>>>On Fri, 29 Jul 2005 10:07:58 -0300
>>>"Tiago Dall'Agnol" <tdallagnol@parks•com.br> wrote:
>>>
>>> 
>>>
>>>      
>>>
>>>>Hi,
>>>>
>>>>I had some problems with irq in my embedded system. I'm interested in 
>>>>this function source code, but I didn't find it in my linux distribuction?
>>>>
>>>>Does anyone know where I can find it?
>>>>
>>>>Thanks a lot
>>>>Tiago
>>>>
>>>>Manish Joshi wrote:
>>>>
>>>>   
>>>>
>>>>        
>>>>
>>>>>Hi,
>>>>>
>>>>>I am working on an old code which uses  request_8xxirq() call which I 
>>>>>can't find in latest kernel.
>>>>>Has this been replaced by something else ?
>>>>>
>>>>>I see the references on net about replacing request_8xxirq()  with 
>>>>>request_irq(). Can I do it ?
>>>>>
>>>>>TIA,
>>>>>Manish
>>>>>
>>>>>
>>>>>------------------------------------------------------------------------
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>>>>>
>>>>>_______________________________________________
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>>>>>https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>>>>>
>>>>>     
>>>>>
>>>>>          
>>>>>
>>>>-- 
>>>>Tiago Dall'Agnol
>>>>Pesquisa e Desenvolvimento
>>>>Tel.: +55.51.470.05.64
>>>>Fax.: +55.51.470.05.70
>>>>e-mail: tdallagnol@parks•com.br
>>>>www.parks.com.br
>>>>
>>>>_______________________________________________
>>>>Linuxppc-embedded mailing list
>>>>Linuxppc-embedded@ozlabs•org
>>>>https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>>>>   
>>>>
>>>>        
>>>>
>>> 
>>>
>>>      
>>>
>>-- 
>>    
>>
>
>  
>

-- 
Tiago Dall'Agnol
Pesquisa e Desenvolvimento
Tel.: +55.51.470.05.64
Fax.: +55.51.470.05.70
e-mail: tdallagnol@parks•com.br
Parks S.A. Comunicações Digitais
www.parks.com.br