Re: Is there spinlocks/semaphores available for drivers?

[Nate Williams]

> :>     *not* preempted except when being interrupted, so there are no
> :>     'priorities', per say.  Or, rather, the relative priority is strictly
> :>     that the interrupt takes priority over supervisor code except when
> :>     disabled by said supervisor code.
> :
> :But locks with owners wouldn't have to disable interrupts (given that
> :we have interrupt threads).  What about shared interrupts?  You could
> :still field and process the interrupt as long as it was for a different
> :device.
> :Dan Eischen
> 
>     The word 'too bad' comes to mind re: shared interrupts.

Too bad is not acceptable.  If we want to support multi-function
PCMCIA/CardBus cards, we *must* do shared interrupts, and multi-function
cards are becoming the standard, rather than the exception.



Nate


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