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From: lovelylich@gmail.com (Yi Li)
To: kernelnewbies@lists.kernelnewbies.org
Subject: How to diasble interrupt of current core in multicore cpu
Date: Fri, 6 Jun 2014 03:05:31 +0800	[thread overview]
Message-ID: <066501cf80f1$22bdc710$68395530$@gmail.com> (raw)
In-Reply-To: <CA+aCy1FtqcgsHdRQPkABH9QLoqo9M=4b1Ch+AQ007GA7+tyaVA@mail.gmail.com>



-----Original Message-----
From: kernelnewbies-bounces@kernelnewbies.org [mailto:kernelnewbies-bounces at kernelnewbies.org] On Behalf Of Pranay Srivastava
Sent: Friday, May 30, 2014 4:26 PM
To: J.Hwan Kim
Cc: kernelnewbies
Subject: Re: How to diasble interrupt of current core in multicore cpu

are you looking for

local_irq_disable?

On Fri, May 30, 2014 at 1:42 PM, J.Hwan Kim <kernel.frog.007@gmail.com> wrote:
> Hi, everyone
>
> How to disable interrupt for current core in multicore CPU?
>
> Thanks in advance
> Kim.
>
local_irq_save/restore would be more suitable. you can use them without considering
is interrupt enabled now. your code may looks like this:
local_irq_save()
/*your code comes here with interrupt disabled*/
local_irq_restore()
in this way, if interrupt is in state A (may be enabled or disabled), before you call local_irq_save(), then after you call local_irq_restore,
the interrupt will still be in state A. harmless to other code.
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies



-- 
        ---P.K.S

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      parent reply	other threads:[~2014-06-05 19:05 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-30  8:12 How to diasble interrupt of current core in multicore cpu J.Hwan Kim
2014-05-30  8:25 ` Pranay Srivastava
2014-05-30  8:29   ` enjoy mindful
2014-06-05 19:05   ` Yi Li [this message]

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