* Is an IRQ line disabled on local CPU or globally?
@ 2011-11-18 22:57 Parmenides
2011-11-19 6:10 ` santhosh kumars
0 siblings, 1 reply; 2+ messages in thread
From: Parmenides @ 2011-11-18 22:57 UTC (permalink / raw)
To: kernelnewbies
Hi,
It is said that an IRQ line is disabled when the same IRQ line is
in process. But, is the IRQ line disabled on the local CPU or all
CPUs? Another relevant question is that the disable_irq() funciton
will disable an IRQ line on local CPU or all CPUs.
^ permalink raw reply [flat|nested] 2+ messages in thread* Is an IRQ line disabled on local CPU or globally?
2011-11-18 22:57 Is an IRQ line disabled on local CPU or globally? Parmenides
@ 2011-11-19 6:10 ` santhosh kumars
0 siblings, 0 replies; 2+ messages in thread
From: santhosh kumars @ 2011-11-19 6:10 UTC (permalink / raw)
To: kernelnewbies
hi Parmenides
On Sat, Nov 19, 2011 at 4:27 AM, Parmenides <mobile.parmenides@gmail.com> wrote:
> Hi,
>
> ? ? It is said that an IRQ line is disabled when the same IRQ line is
> in process. But, is the IRQ line disabled on the local CPU or all
> CPUs? Another relevant question is that the disable_irq() funciton
> will disable an IRQ line on local CPU or all CPUs.
IRQ is disabled in all processors.
disable_irq() function disables the delivery of the given interrupt to
all processors.Additionally the disable_irq function does not return
until any currently executing handler completes.
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>
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2011-11-18 22:57 Is an IRQ line disabled on local CPU or globally? Parmenides
2011-11-19 6:10 ` santhosh kumars
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