# git rev-parse -q --verify 49d766f3a0e49624c4cf83909d56c68164e7c545^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
# git rev-parse -q --verify 49d766f3a0e49624c4cf83909d56c68164e7c545^{commit}
49d766f3a0e49624c4cf83909d56c68164e7c545
# git checkout -q -f -B kisskb 49d766f3a0e49624c4cf83909d56c68164e7c545
# git clean -qxdf
# < git log -1
# commit 49d766f3a0e49624c4cf83909d56c68164e7c545
# Merge: a08b41ab9e2e 27cdfde181bc
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Tue Jan 25 18:29:10 2022 +0200
# 
#     Merge tag 'for-5.17-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
#     
#     Pull btrfs fixes from David Sterba:
#      "Several fixes for defragmentation that got broken in 5.16 after
#       refactoring and added subpage support. The observed bugs are excessive
#       IO or uninterruptible ioctl.
#     
#       All stable material"
#     
#     * tag 'for-5.17-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
#       btrfs: update writeback index when starting defrag
#       btrfs: add back missing dirty page rate limiting to defrag
#       btrfs: fix deadlock when reserving space during defrag
#       btrfs: defrag: properly update range->start for autodefrag
#       btrfs: defrag: fix wrong number of defragged sectors
#       btrfs: allow defrag to be interruptible
#       btrfs: fix too long loop when defragging a 1 byte file
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 49d766f3a0e49624c4cf83909d56c68164e7c545
# < make -s -j 80 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  x86_64_defconfig
# < make -s -j 80 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  help
# make -s -j 80 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  olddefconfig
# make -s -j 80 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
Completed OK
# rm -rf /kisskb/build/linus_x86_64_defconfig_x86_64-gcc8
# Build took: 0:03:00.512305