I applied this patch to a 1.6.21-2ubuntu1 package that I've uploaded to the canonical-kernel-team/unstable ppa and started ADT against that package. s390x passed:
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-artful-canonical-kernel-team-unstable/artful/s390x/o/openafs/20170823_163112_7793c@/log.gz
i386 also passed, still waiting armhf and amd64 to complete.
I applied this patch to a 1.6.21-2ubuntu1 package that I've uploaded to the canonical- kernel- team/unstable ppa and started ADT against that package. s390x passed:
https:/ /objectstorage. prodstack4- 5.canonical. com/v1/ AUTH_77e2ada1e7 a84929a74ba3b87 153c0ac/ autopkgtest- artful- canonical- kernel- team-unstable/ artful/ s390x/o/ openafs/ 20170823_ 163112_ 7793c@/ log.gz
i386 also passed, still waiting armhf and amd64 to complete.