* Doubt in interrupts
@ 2001-07-02 17:41 Swami
2001-07-02 18:20 ` Brian Gerst
0 siblings, 1 reply; 2+ messages in thread
From: Swami @ 2001-07-02 17:41 UTC (permalink / raw)
To: linux-kernel
Hi,
Are there any interrupts which doesn't affect local_irq_count(cpu) or that
doesn't enter do_IRQ()? (other than NMIs).
Because I'm implementing my own locking routine and I'm getting
interrupted during spin, but I check and found that in_interupt() returns
zero.
Thanking in advance,
Swami
--------------------------
http://www.swaminathans.com
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Doubt in interrupts
2001-07-02 17:41 Doubt in interrupts Swami
@ 2001-07-02 18:20 ` Brian Gerst
0 siblings, 0 replies; 2+ messages in thread
From: Brian Gerst @ 2001-07-02 18:20 UTC (permalink / raw)
To: Swami; +Cc: linux-kernel
Swami wrote:
>
> Hi,
>
> Are there any interrupts which doesn't affect local_irq_count(cpu) or that
> doesn't enter do_IRQ()? (other than NMIs).
>
> Because I'm implementing my own locking routine and I'm getting
> interrupted during spin, but I check and found that in_interupt() returns
> zero.
All hardware interrupts go through do_IRQ. There are also CPU
exceptions and inter-processor interupts (SMP only) that have individual
handlers.
--
Brian Gerst
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2001-07-02 17:41 Doubt in interrupts Swami
2001-07-02 18:20 ` Brian Gerst
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