[parisc-linux] The parisc SMP boot problem

[James Bottomley]

After a bit more of an analysis of our changesets (I concluded it must
have been something we introduced).  This is the source of the SMP boot
hang on 2.6.20-rcX:

commit 01a9fa750904beed08814364fcbd7039eca8ec71
Author: Randolph <tausq at debian.org>
Date:   Mon Dec 11 16:07:51 2006 -0800

    Optimize TLB flush on SMP systems
    
    Signed-off-by: Randolph Chung <tausq at debian.org>

As predicted, the reason it passed all the tests at the time it was
introduced is that because of the piggin bug, we were only scheduling on
a single CPU, and so the SMP piece of this wasn't truly tested.

Reverting this patch allows ioz to boot correctly.

James