[PATCH 08/14] tty/serial/kgdboc: Add and wire up clear_irqs callback

[Alan Cox]

> serial port, the CPU receives NMI exception, and we fall into KDB shell.
> So, it is our "debug console", and it is able to interrupt (and thus
> debug) even IRQ handlers themselves.


You seem to have an assumption of single core here. What happens if the
NMI hits CPU #0 and the serial IRQ hits CPU #1 simultaneously ?

Alan