# git gc
# git rev-parse -q --verify 7cdb85df6061d001fffd09c6adfbcf20356615e2^{commit}
7cdb85df6061d001fffd09c6adfbcf20356615e2
already have revision, skipping fetch
# git checkout -q -f -B kisskb 7cdb85df6061d001fffd09c6adfbcf20356615e2
# git clean -qxdf
# < git log -1
# commit 7cdb85df6061d001fffd09c6adfbcf20356615e2
# Merge: 43b815c6a8e7 2cf2aa6a69db
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Oct 6 11:10:15 2019 -0700
# 
#     Merge tag 'dma-mapping-5.4-1' of git://git.infradead.org/users/hch/dma-mapping
#     
#     Pull dma-mapping regression fix from Christoph Hellwig:
#      "Revert an incorret hunk from a patch that caused problems on various
#       arm boards (Andrey Smirnov)"
#     
#     * tag 'dma-mapping-5.4-1' of git://git.infradead.org/users/hch/dma-mapping:
#       dma-mapping: fix false positive warnings in dma_common_free_remap()
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-ld --version
# < git log --format=%s --max-count=1 7cdb85df6061d001fffd09c6adfbcf20356615e2
# < make -s -j 24 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-  defconfig
# make -s -j 24 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-  
Completed OK
# rm -rf /kisskb/build/linus_s390-defconfig_s390x-gcc8
# Build took: 0:09:23.751025