> Under some circumstances I can work out which sources have triggered which > interrupts (there are various off-CPU FPGAs which implement auxiliary PICs > that > do announce their sources), but the aux-PIC channels are grouped together upon > delivery to the CPU PIC, so some of the ACK'ing has to be done at the group > level. > > > how is this not possible via genirq? > > How is it possible with genirq?
Well, genirq gives you more flexibility than the current mecanism so ... If I understand correctly, you need to do scray stuff to figure out your toplevel irq, which shound't be a problem with either mecanisms... Now, if you have funky cascades, then you can always group them into a virtual irq cascade line and have a special chained flow handler that does all the "figuring out" off those... it's up to you. In general, I found genirq allowed me to do more fancy stuff, and end up with actually less hooks and indirect function calls on the path to a given irq than before as you can use tailored flow handlers that do just the right thing. Ben. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
