From: Tushar Adeshara <adesharatushar@gmail.com>
To: mandy london <laborious.bee@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: the difference between irq save and the irq disable ?
Date: Tue, 6 Sep 2005 12:17:40 +0530 [thread overview]
Message-ID: <e8ac1af105090523472d2af8a7@mail.gmail.com> (raw)
In-Reply-To: <907421f905090506337ba17394@mail.gmail.com>
On 9/5/05, mandy london <laborious.bee@gmail.com> wrote:
> in my mind, irq save only store the conditions of that time , and the
> following code can access the shared region and change it ,so modify
> irq states .
>
> while , disable irq keeps the states of interrupt unchangable .
>
> but , I have no knowlege of the difference between code in irq save
> and irq restore and in irq disable and irq enable ?
>
> whethe the former can be interrupted and the later not ? only this ?
Have a look at Documentaion/cli-sti-removal.txt. As per that,
irq_enable will enable all irqs and irq_restore will bring irq status
to the one it was
before irq_save.
And as per my knowledge, non are
interruptible except case of RT.
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--
Regards,
Tushar
--------------------
It's not a problem, it's an opportunity for improvement. Lets improve.
prev parent reply other threads:[~2005-09-06 6:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-05 13:33 the difference between irq save and the irq disable ? mandy london
2005-09-06 6:47 ` Tushar Adeshara [this message]
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