# git rev-parse -q --verify b1e76c3d3a774298475622bde63010972c9515a1^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
error: The last gc run reported the following. Please correct the root cause
and remove .git/gc.log.
Automatic cleanup will not be performed until the file is removed.

warning: There are too many unreachable loose objects; run 'git prune' to remove them.

# git rev-parse -q --verify b1e76c3d3a774298475622bde63010972c9515a1^{commit}
b1e76c3d3a774298475622bde63010972c9515a1
# git checkout -q -f -B kisskb b1e76c3d3a774298475622bde63010972c9515a1
# git clean -qxdf
# < git log -1
# commit b1e76c3d3a774298475622bde63010972c9515a1
# Merge: 800c608c976c 3213486f2e44
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Thu May 9 13:28:26 2019 -0700
# 
#     Merge tag 'csky-for-linus-5.2-perf-unwind-libdw' of git://github.com/c-sky/csky-linux
#     
#     Pull arch/csky perf update from Guo Ren:
#      "Add support for perf unwind-libdw"
#     
#     * tag 'csky-for-linus-5.2-perf-unwind-libdw' of git://github.com/c-sky/csky-linux:
#       csky: Add support for perf unwind-libdw
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 b1e76c3d3a774298475622bde63010972c9515a1
# < make -s -j 48 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  randconfig
KCONFIG_SEED=0x18539BD1
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# yes \n | make -s -j 48 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 48 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  
arch/arm64/Makefile:27: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
arch/arm64/Makefile:40: LSE atomics not supported by binutils
arch/arm64/Makefile:27: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
arch/arm64/Makefile:40: LSE atomics not supported by binutils
<stdin>:1388:2: warning: #warning syscall open_tree not implemented [-Wcpp]
<stdin>:1391:2: warning: #warning syscall move_mount not implemented [-Wcpp]
<stdin>:1394:2: warning: #warning syscall fsopen not implemented [-Wcpp]
<stdin>:1397:2: warning: #warning syscall fsconfig not implemented [-Wcpp]
<stdin>:1400:2: warning: #warning syscall fsmount not implemented [-Wcpp]
<stdin>:1403:2: warning: #warning syscall fspick not implemented [-Wcpp]
/kisskb/src/kernel/locking/lockdep.c:2820:13: warning: 'print_lock_trace' defined but not used [-Wunused-function]
 static void print_lock_trace(struct lock_trace *trace, unsigned int spaces)
             ^
Completed OK
# rm -rf /kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4
# Build took: 0:02:44.179222