Re: [ACPI] Re: Linux 2.4.26-rc1 (cmpxchg vs 80386 build)

From: Richard B. Johnson
Date: Tue Mar 30 2004 - 08:16:05 EST

On Tue, 30 Mar 2004, Alan Cox wrote:

> On Llu, 2004-03-29 at 23:07, Len Brown wrote:
> > Linux uses this locking mechanism to coordinate shared access
> > to hardware registers with embedded controllers,
> > which is true also on uniprocessors too.
> If the ACPI layer simply refuses to run on a CPU without cmpxchg
> then I can't see there being a problem, there don't appear to be
> any 386 processors with ACPI

Yep, but to get to use cmpxchg, you need to compile as a '486 or
higher. This breaks i386.

Dick Johnson
Penguin : Linux version 2.4.24 on an i686 machine (797.90 BogoMips).
Note 96.31% of all statistics are fiction.

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