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

On Tue, 30 Mar 2004, Alan Cox wrote:

On Llu, 2004-03-29 at 23:07, Len Brown wrote:

quoted

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.

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