Subject: Re: bus_space_barrier shortcomings
To: None <firstname.lastname@example.org>
From: Jason R Thorpe <email@example.com>
Date: 11/16/2000 08:13:35
On Thu, Nov 16, 2000 at 04:03:44PM -0000, firstname.lastname@example.org wrote:
> Huh? I'll admit that bus_space_barrier lacks some of the
> flexibility of the barriers available on some architectures,
> but a BUS_SPACE_BARRIER_WRITE barrier should be sufficient
> to ensure the write completes. If completion of the memory
> operation is not enough to acknowledge the interrupt, your
> hardware is broken to the point that it is impossible to
> write a driver for it on any machine.
As defined BUS_SPACE_BARRIER_WRITE merely requires that all other writes
complete before the one after the barrier.
-- Jason R. Thorpe <email@example.com>