PERFORCE change 102954 for review

[Sam Leffler]

Paolo Pisati wrote:
> http://perforce.freebsd.org/chv.cgi?CH=102954
> 
> Change 102954 by piso at piso_newluxor on 2006/08/01 17:24:16
> 
> 	Convert ath to use a filter+ithread handler:
> 	
> 	use a spinlock (inside softc) to guard against
> 	races when accessing sc_status or the interrupt registers,
> 	and axe all the taskqueue jobs from ath_intr().

I highly doubt this does the right thing and the spinlock is almost
certain to be the wrong thing to do here.  We should probably talk
privately about how to restructure ath to use your stuff but I expected
a very different approach.

	Sam