s390x port progress: patch queue for hotspot assembled.

[Lindenmaier, Goetz]

Hi Java and s390x fans!

I want to report about the progress in the s390x port project.

I have been working internally on the port of hotspot.
I arranged a preliminary patch queue that adds all required
hotspot  to build openJdk hotspot from our internal s390x port.
As expected, the amount of shared changes required is very low.

I need the following 9 changes, annotated with the known T-shirt sizes:

L: All the required includes of s390x files in shared files and all places
    where the string s390x is needed.
M: A row of S390_ONLY() macros in shared code, e.g. C1 requires some
      of them.
6xS: Six 'X' size changes are currently needed that add a new field to a
    shared datastructure or an argument to a method.

XL: The s390x and linux_s390x files.

TODOs:

-          I probably need to do some fixes in hotspot, and adapt some functionality

as our internal port is at jdk9 b107.

-          Get the jdk build working.

-          Run tests and fix issues.

Best regards,
Goetz.