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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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