Comment 1 for bug 1422285

the first bad commit is:
commit ec6f25e788ef57ce1e9f734984ef8885172fd9e2
Merge: 007c99f 9ef1473
Author: Peter Maydell <email address hidden>
Date: Tue Feb 3 21:37:16 2015 +0000

    Merge remote-tracking branch 'remotes/rth/tags/pull-tg-s390-20150203' into staging

    s390 translator bug fixes

    # gpg: Signature made Tue 03 Feb 2015 20:39:15 GMT using RSA key ID 4DD0279B
    # gpg: Good signature from "Richard Henderson <email address hidden>"
    # gpg: aka "Richard Henderson <email address hidden>"
    # gpg: aka "Richard Henderson <email address hidden>"

    * remotes/rth/tags/pull-tg-s390-20150203:
      target-s390x: fix and optimize slb* and slbg* computation of carry/borrow flag
      target-s390x: support OC and NC in the EX instruction
      disas/s390.c: Remove unused variables
      target-s390x: Mark check_privileged() as !CONFIG_USER_ONLY
      target-s390: Implement ECAG
      target-s390: Implement LURA, LURAG, STURG
      target-s390: Fix STURA
      target-s390: Fix STIDP
      target-s390: Implement EPSW
      target-s390: Implement SAM specification exception

    Signed-off-by: Peter Maydell <email address hidden>