Re: Question about interrupts

[santhosh kumars <karuna.linux@xxxxxxxxx>]

On Fri, Jul 29, 2011 at 3:16 PM, manish honap
<manish_honap_vit@xxxxxxxxxxx> 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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