Arnd Bergmann [off-list ref] writes:

On Wed, Mar 15, 2017 at 6:35 AM, Michael Ellerman [off-list ref] wrote:

quoted

I'll do patches for everything above that's not drivers/soc or
include/soc and hopefully we can hear from someone at NXP on the plans
for getting the soc parts enabled on arm.

I think the removal of the NO_IRQ references is a requirement for
getting the drivers working properly on ARM, as the OF platform
code will use '0' for invalid IRQs.

OK. So the #define NO_IRQ (-1) in arch/arm/include/asm/irq.h is a red
herring and should be ignored for anything modern?

cheers