[Xen-devel] Is teardown_irq still required?

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

Hi, Ian/Keir,
        Just noted the change to kernel/irq/manage.c by adding 
teardown_irq which is also part of the patch sets you proposed to linux 
kernel long time ago. However currently no one seems to invoke 
teardown_irq directly based on the purpose for adding it. 

        Does the assumption still hold true that some static irqaction
may be 
freed by this way? Or previous requirement already disappears today? 
Now all the virtual drivers finally fall down to request_irq which
matches 
free_irq. Only instances to call setup_irq are native linux drivers,
where 
free_irq is not required for those architecture specific static irq
number.

        Maybe this change can be removed now?

Thanks,
Kevin

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