Fw: Question about interrupts

[santhosh kumars]

On Fri, Jul 29, 2011 at 3:56 PM, manish honap
<manish_honap_vit at yahoo.co.in> wrote:
> Well 2.6.39 seems to have changed and the flow as I understand for interrupt
> processing is
> do_IRQ -> irq_enter -> handle_irq -> ...
>
> but in above flow i cant find local_irq_enable anywhere; is there some different
> trick used to enable the interrupts ?
yes in 2.6.34 i am able to find do_IRQ and handle_IRQ_event(), defined in
kernel/irq/handler.c but with 2.6.39 its moved some where .Can any one
please help me on this
where this logic is moved.
>
>
>
>
> ----- Forwarded Message ----
> From: santhosh kumars <karuna.linux at gmail.com>
> To: manish honap <manish_honap_vit at yahoo.co.in>
> Cc: kernelnewbies at kernelnewbies.org
> Sent: Fri, 29 July, 2011 3:31:10 PM
> Subject: Re: Question about interrupts
>
> On Fri, Jul 29, 2011 at 3:16 PM, manish honap
> <manish_honap_vit at yahoo.co.in> wrote:
>> Hello all,
>>
>> When interrupts are handled through interrupt gate cpu automatically clears IF
>> flag.
>>
>> but to allow nesting kernel sets the IF flag in handle_irq_event - for 2.6.11
>>
>> but in 2.6.39 how the interrupts are re-enabled so as to facilitate nesting of
>> interrupts
>> I am unable to find local_irq_enable in do_IRQ()
> I think in handle_IRQ_event event again interrupts are enabled
> if (!(action->flags & IRQF_DISABLED))
> local_irq_enable_in_hardirq();
>
>>
>> Thanks in advance.
>>
>>
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>
>