# git rev-parse -q --verify 6381b442836ea3c52eae630b10be8c27c7a17af2^{commit}
6381b442836ea3c52eae630b10be8c27c7a17af2
already have revision, skipping fetch
# git checkout -q -f -B kisskb 6381b442836ea3c52eae630b10be8c27c7a17af2
# git clean -qxdf
# < git log -1
# commit 6381b442836ea3c52eae630b10be8c27c7a17af2
# Merge: 3c45d7510cf5 8c17bbf6c8f7
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Fri Jan 24 09:56:59 2020 -0800
# 
#     Merge tag 'iommu-fixes-v5.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
#     
#     Pull iommu fixes from Joerg Roedel:
#      "Two fixes:
#     
#        - Fix NULL-ptr dereference bug in Intel IOMMU driver
#     
#        - Properly save and restore AMD IOMMU performance counter registers
#          when testing if they are writable"
#     
#     * tag 'iommu-fixes-v5.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
#       iommu/amd: Fix IOMMU perf counter clobbering during init
#       iommu/vt-d: Call __dmar_remove_one_dev_info with valid pointer
# < /opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-gcc --version
# < /opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-ld --version
# < git log --format=%s --max-count=1 6381b442836ea3c52eae630b10be8c27c7a17af2
# < make -s -j 48 ARCH=xtensa O=/kisskb/build/linus_xtensa-allnoconfig_xtensa CROSS_COMPILE=/opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-  allnoconfig
# make -s -j 48 ARCH=xtensa O=/kisskb/build/linus_xtensa-allnoconfig_xtensa CROSS_COMPILE=/opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-  
Completed OK
# rm -rf /kisskb/build/linus_xtensa-allnoconfig_xtensa
# Build took: 0:00:16.541965