> > how about:
> > 
> > 	testl	$(-(1 << (num + 1))), CPUVAR(IPENDING)
> > 
> 
> Only the IPI and timer interrupt pending bits are ordered.
> ( Pending interrupts (except IPI,timer) are not currently scheduled in
> priority order on lowering the interrupt level) 
> 
> Your proposed change may pick up pending bits of interrupts that are
> currently masked. This could delay interrupt delivery.
> 
> Stephan

ah, yes, you're right.  thanks for clarification.

YAMAMOTO Takashi