# git rev-parse -q --verify d6d460b89378b1bc6715574cdafd748ba59d5a27^{commit}
d6d460b89378b1bc6715574cdafd748ba59d5a27
already have revision, skipping fetch
# git checkout -q -f -B kisskb d6d460b89378b1bc6715574cdafd748ba59d5a27
# git clean -qxdf
# < git log -1
# commit d6d460b89378b1bc6715574cdafd748ba59d5a27
# Merge: 17c2f540863a cb216b84d6ea
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Nov 25 09:24:40 2018 -0800
# 
#     Merge tag 'dma-mapping-4.20-3' of git://git.infradead.org/users/hch/dma-mapping
#     
#     Pull dma-mapping fixes from Christoph Hellwig:
#      "Two dma-direct / swiotlb regressions fixes:
#     
#        - zero is a valid physical address on some arm boards, we can't use
#          it as the error value
#     
#        - don't try to cache flush the error return value (no matter what it
#          is)"
#     
#     * tag 'dma-mapping-4.20-3' of git://git.infradead.org/users/hch/dma-mapping:
#       swiotlb: Skip cache maintenance on map error
#       dma-direct: Make DIRECT_MAPPING_ERROR viable for SWIOTLB
# < /opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-gcc --version
# < git log --format=%s --max-count=1 d6d460b89378b1bc6715574cdafd748ba59d5a27
# < make -s -j 80 ARCH=sparc64 O=/kisskb/build/linus_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  defconfig
# make -s -j 80 ARCH=sparc64 O=/kisskb/build/linus_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  
<stdin>:1335:2: warning: #warning syscall rseq not implemented [-Wcpp]
WARNING: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.
  kernel: arch/sparc/boot/image is ready
WARNING: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.
  kernel: arch/sparc/boot/zImage is ready
Completed OK
# rm -rf /kisskb/build/linus_sparc64-defconfig_sparc64
# Build took: 0:01:09.888797