[parisc-linux] Dino PCI and I/O spaces

[Alan Cox]

> On Mon, Jun 14, 1999 at 04:15:08PM +0100, Alan Cox wrote:
> > Also as a btw: PCI I/O port access will suck rocks on HP because we have
> > to grab a lock since it is a two stage operation. That may mean we want
> > to write smart copy/csum/io and ins* functions for PCI block I/O.
> 
> Do we only have to grab a lock on SMP machines, or can we sleep between
> the two accesses?

On a uniprocessor we might take an interrupt between the two cycles. So we
have to suffer anyway