SEGV from init in AMD64 Xen DomU current system

[Robert Elz <kre%munnari.OZ.AU@localhost>]

I just built and booted a Xen DomU system (kernel and system from sources
from a few hours ago) and the result is a seemingly infinite stream of:

[   2.0131873] Process (pid 1) got sig 11

(with the time increasing, of course).

Anyone care to guess what the cause of that one might be?

(Joerg's changes to CSU, or my fixes of that, or maxv's changes
to amd64 or the removal of the PMC stuff (unlikely) or ???)

kre