Re: SMP in 2.4

[Mikulas Patocka]

> > 	testb %al, intr_pending
> > 	jnz somewhere_away_to_handle_defered_interrupt
> > 
> > And - of course - interrupt checks intr_lock in its entry and if it is
> > zero, sets intr_pending and exits immediatelly.
> 
> And immediately gets called again. You have to mask the irq which is non trivial
> especially if you want to do it right on the BX. But you can do this and rtlinux
> does

There is already desc->handler->ack(irq) in do_IRQ which does that. Is any
more special handling needed? 

Mikulas