lkml.org 
[lkml]   [2005]   [Sep]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: the difference between irq save and the irq disable ?
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.

> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>


--
Regards,
Tushar
--------------------
It's not a problem, it's an opportunity for improvement. Lets improve.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-09-06 08:50    [W:0.032 / U:0.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site