[PATCH] initialize TCE tables

[Paul Mackerras]

John Rose writes:

> A fairly recent platform requirement states that the OS must clear the
> whole TCE table at setup time, in case firmware left any active
> mappings in it.  Without this initialization, dynamic bus removes can
> fail.  Firmware rejects these requests if active mappings still exist 
> for a slot that has been deallocated by the OS.
> 
> If there are no objections, I'll forward this to Andrew Morton.

Looks fine to me.  Do we need to push for it to be in 2.6.12?

Paul.