From: karuna.linux@gmail.com (santhosh kumars)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Is an IRQ line disabled on local CPU or globally?
Date: Sat, 19 Nov 2011 11:40:57 +0530 [thread overview]
Message-ID: <CABECqUFDwBqq67VKMnn4FUKk_BfphsMr_xEjsusdUSA2airtFQ@mail.gmail.com> (raw)
In-Reply-To: <CAOXENUh0KfhF+rk_=YgsQ_LRJvLa78nA+dGDpiw_FVFdmP2QoQ@mail.gmail.com>
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
>
prev parent reply other threads:[~2011-11-19 6:10 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-18 22:57 Is an IRQ line disabled on local CPU or globally? Parmenides
2011-11-19 6:10 ` santhosh kumars [this message]
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