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SubjectRe: Is it useful to support user level drivers
On Thu, 21 Jun 2001, Oliver Neukum wrote:

> > Lastly an IRQ kernel module can disable_irq() from interrupt handler
> > and enable it again only on explicit acknowledge from user.
> Unless you need that interrupt to be enabled to deliver the signal or let

Need not. Signal and other event delivery mechanisms has nothing
common with disable/enable_irq().

> userspace reenable the interrupt.

"user acknowledge" is mean that.

> In addition, how do you handle shared interrupts ?

It is impossible, see my another message.

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