Mainline Build v4.14.21 build failed

[Mainline Builds]

The mainline build (build) for v4.14.21 is now complete (failed) and available
at the URL below:

    http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.14.21/

Build architecture status:
    binary-headers: good (rc=0)
    amd64: good (rc=0)
    i386: good (rc=0)
    armhf: good (rc=0)
    arm64: good (rc=0)
    ppc64el: failed (rc=2)
    s390x: good (rc=0)

See the CHANGES file for the list of changes from the previous version:

    http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.14.21/CHANGES

Note that these builds do not contain any Ubuntu specific patches and
are not supported.

Kernel Team