Messages in this thread | | | Date | Tue, 6 Sep 2005 12:17:40 +0530 | From | Tushar Adeshara <> | Subject | Re: the difference between irq save and the irq disable ? |
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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. - 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/
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