[PATCH] ucc_geth: Rework the TX logic.

[Joakim Tjernlund]

Scott Wood <scottwood at freescale.com> wrote on 30/03/2009 19:22:03:
> 
> Joakim Tjernlund wrote:
> > gianfar does not seem to use in_/out_ functions for the BDs. Works 
just
> > fine that too it seems.
> 
> It does now that it has explicit barriers in a few places.  Before they

In 2.6.29 or later?
 
> were added, it would sometimes fail under load.  That was due to a 
> compiler reordering, but CPU reordering was possible as well.

Does not the CPU skip reordering if the guarded bit is set?

Could we not use the same in ucc_geth as well? Then people would
not need to worry about "performance issues".

 Jocke