On Tue, 17 Mar 2009, Paolo Pisati wrote: > perhaps i misunderstood your question, but i'll try to explain a bit: > > before 7.0, bus_setup_intr() took just one function thus you could have an > INTR_FAST or an INTR_MPSAFE handler, and you choose the kind of handler via > a flag (INTR_FAST in this case). > > after 7.0, bus_setup_intr() took 2 functions, thus you could have: a fast > handler (aka filter), or an ithread handler (aka mpsafe), or a fast + > ithread handler (available only with INTR_FILTER turned on). > > in bus_setup_intr() the first function pointer is for the filter side of the > handler, while the second pointer is for the ithread part, and if you > declare both you can filter events (interrupts) and call the rest of the > device driver (the ithread part) after the filter has recognized and > acknowledged&masked the interrupt. This clarifies my misunderstanding, thanks! Robert N M Watson Computer Laboratory University of CambridgeReceived on Tue Mar 17 2009 - 14:24:27 UTC
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