# git rev-parse -q --verify 121b018f8c74b4e0ba81b4b8ee73a82db3f24b7b^{commit}
121b018f8c74b4e0ba81b4b8ee73a82db3f24b7b
already have revision, skipping fetch
# git checkout -q -f -B kisskb 121b018f8c74b4e0ba81b4b8ee73a82db3f24b7b
# git clean -qxdf
# < git log -1
# commit 121b018f8c74b4e0ba81b4b8ee73a82db3f24b7b
# Merge: 5b26f7180cdb 42a657f57628
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Nov 28 08:38:20 2018 -0800
# 
#     Merge tag 'for-4.20-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
#     
#     Pull btrfs fixes from David Sterba:
#      "Some of these bugs are being hit during testing so we'd like to get
#       them merged, otherwise there are usual stability fixes for stable
#       trees"
#     
#     * tag 'for-4.20-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
#       btrfs: relocation: set trans to be NULL after ending transaction
#       Btrfs: fix race between enabling quotas and subvolume creation
#       Btrfs: send, fix infinite loop due to directory rename dependencies
#       Btrfs: ensure path name is null terminated at btrfs_control_ioctl
#       Btrfs: fix rare chances for data loss when doing a fast fsync
#       btrfs: Always try all copies when reading extent buffers
# < /opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-gcc --version
# < git log --format=%s --max-count=1 121b018f8c74b4e0ba81b4b8ee73a82db3f24b7b
# < make -s -j 48 ARCH=xtensa O=/kisskb/build/linus_xtensa-defconfig_xtensa CROSS_COMPILE=/opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-  defconfig
drivers/staging/mt7621-dts/Kconfig:4:warning: 'BUILTIN_DTB' has wrong type. 'select' only accept arguments of bool and tristate type
# make -s -j 48 ARCH=xtensa O=/kisskb/build/linus_xtensa-defconfig_xtensa CROSS_COMPILE=/opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-  
<stdin>:1332:2: warning: #warning syscall io_pgetevents not implemented [-Wcpp]
<stdin>:1335:2: warning: #warning syscall rseq not implemented [-Wcpp]
Completed OK
# rm -rf /kisskb/build/linus_xtensa-defconfig_xtensa
# Build took: 0:00:27.827367