[PATCH 1/8] Remove NACA fixed address constraint

[David Boutcher]

Jeff Scheel <scheel at vnet.ibm.com> wrote on 08/09/2005 01:42:42 AM:
> On Mon, 2005-08-01 at 05:53, David Gibson wrote:
> > Comments in head.S suggest that the iSeries naca has a fixed address,
> > because tools expect to find it there.  The only tool which appears to
> > access the naca is addRamDisk, but both the in-kernel version and the
> > version used in RHEL and SuSE in fact locate the NACA the same way as
> > the hypervisor does, by following the pointer in the hvReleaseData
> > structure.
> > 
> > Since the requirement for a fixed address seems to be obsolete, this
> > patch removes the naca from head.S and replaces it with a normal C
> > initializer.
> There are IBM internal debug tools built into the iSeries which depend 
> on this address.  Removing it will break them.
> 
> You should really get input from Mike Ranweiler as to the impact of this
> change.  Dave Boutcher might also have insight.
> -Jeff
 
I was asked before this patch was sent..  No one that I am aware of 
has used these tools in a couple of years.

Dave Boutcher
IBM Linux Technology Center
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