On Tue, 4 Mar 2014, Alexander Shiyan wrote:
> Вторник, 4 марта 2014, 12:05 +01:00 от Thomas Gleixner <t...@linutronix.de>:
> > On Sat, 1 Mar 2014, Alexander Shiyan wrote:
> >
> > > This will allow to use dummy IRQ handler no_action() from
> > > drivers compiled as module. For example, dummy handler is could
> > > be used for drivers that use ARM FIQ interrupts.
> >
> > And why exactly requires a driver which uses ARM FIQ interrupts the
> > no_action implementation?
>
> FIQ Interrupt handler is not used in this function. In FIQ case this
> is just a dummy declaration. Real handler is assigned by using the
> set_fiq_handler().
Why do you need a dummy declaration at all?
set_fiq_handler() is completely detached from the generic interrupt
subsystem.
Thanks,
tglx
