>>> Eduardo Horvath <eeh@NetBSD.org> wrote

> On Sat, Jul 24, 2004 at 10:08:56AM +0900, Takeshi Nakayama wrote:
> 
> > Our interrupt handler pending list has issue that it has
> > possibilities to link same handler twice, since we use same value
> > 0 to indicate the list end and a interrupt handler in-use flag.
> 
> I don't think this should be an issue since hardware should
> only be able to generate an interrupt once and the interrupt
> must be handled and acknowledged (hence unlinked) before it
> can be re-issued.  Or am I missing something here?

The case shared same interrupt level with multiple devices
(handled by intr_list_handler() in sparc64/intr.c), I thought it
may occur multiple interrupts. Is it my misunderstand?

However, the case of software interrupts?

-- Takeshi Nakayama