v4 version of kprobes64 patch

[David Long]

Sorry it took so long but I've now added a "kprobes64-v4" branch to my repo:

http://git.linaro.org/people/dave.long/linux.git

...which should address the issues from the last review of the v3 
version.  It includes Steve Cappers interrupt fix, in place of Will 
Cohen's.  I had to redo a rather central part of the patch to 
(hopefully) satisy the coment that I should be making more use of 
insn.[hc].  I elected to replace the table-driven parsing with a 
slightly lengthy if statement instead, since there are a limited number 
of cases where we have to recognize special cases for instructions.

My branch is backed by the upstream v3.18 final version.  Patches backed 
by the fedorahosted repo can be supplied on request.

I know it's the holidays for most people, but if anyone wants to 
exercise this patch set please give me some feedback.  I will be 
checking mail over the holidays.

-dl