Benjamin Herrenschmidt <[EMAIL PROTECTED]> wrote: > No, you do a chain handler. Look at how I do it in > arch/powerpc/platform/pseries/setup.c for example. It's actually > trivial. You install a special flow handler (which means that there is > very little overhead, almost none, from the toplevel irq to the chained > irq). You can _also_ if you want just install an IRQ handler for the > cascaded controller and call generic_handle_irq (rather than __do_IRQ) > from it, but that has more overhead. A chained handler completely > relaces the flow handler for the cascade, and thus, if you don't need > all of the nits and bits of the other flow handlers for your cascade, > you can speed things up by hooking at that level.
Please update Documentation/DocBook/genericirq.tmpl. That doesn't mention it. David - 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
