[PATCH] ppc64 utmp changes

[Andreas Jaeger]

"Steve Munroe" <sjmunroe@us.ibm.com> writes:

> Jakub Jelinek write:
>
>> Now an important question is whether we want to do something similar
>> on x86-64, s390/s390x and sparc/sparc64.
>> Because when both 32-bit and 64-bit programs will use utmp/utmpx,
>> the files will contain garbage.
>
> Yes that is an important question!
>
> I still don't understand by this (and other BIARCH stuff) is not a concern
> for the more mature BIARCH systems (s390, x86_64, sparc, ...). But I can
> find no evidence of this in the sysdeps source for those platforms ...
>
> For powerpc64 we assume that most of the system utilities (the utilities
> that write /var/run/utmp for example) will remain 32-bit. So for us making
> 64-bit backward compatible to 32-bit utmp is the best answer. What are s390
> and x86_64 assuming?

s390x and x86-64 both have full 64-bit userland with compatibility for
32-bit userland.  Or in other words: Basically both are prime
citiziens.

Andreas
-- 
 Andreas Jaeger
  SuSE Labs aj@suse.de
   private aj@arthur.inka.de
    http://www.suse.de/~aj