[Patch] Fix ABI incompatibilities on s390x

[Andrew Cagney]

> (I understand
> that IBM has a special agreement regarding how copyright assignment is
> handled; perhaps the patches could be reviewed separately, but then
> assigned as a single patch.)

Yes, that is correct, the patch-set will need a digital assignment. 
Gerhard, if you need details let me know.

Transfering as a single final patch at the end is a good idea.

(don't forget the 5.3 branch once this has been cleared.)

Andrew