# git rev-parse -q --verify 6fbc7275c7a9ba97877050335f290341a1fd8dbf^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
warning: 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 6fbc7275c7a9ba97877050335f290341a1fd8dbf^{commit}
6fbc7275c7a9ba97877050335f290341a1fd8dbf
# git checkout -q -f -B kisskb 6fbc7275c7a9ba97877050335f290341a1fd8dbf
# git clean -qxdf
# < git log -1
# commit 6fbc7275c7a9ba97877050335f290341a1fd8dbf
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Jun 30 11:25:36 2019 +0800
# 
#     Linux 5.2-rc7
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-ld --version
# < git log --format=%s --max-count=1 6fbc7275c7a9ba97877050335f290341a1fd8dbf
# < make -s -j 80 ARCH=s390 O=/kisskb/build/linus_s390-allnoconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  allnoconfig
# make -s -j 80 ARCH=s390 O=/kisskb/build/linus_s390-allnoconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:194:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/arch/s390/kernel/machine_kexec.c:146:22: warning: 'do_start_kdump' defined but not used [-Wunused-function]
Completed OK
# rm -rf /kisskb/build/linus_s390-allnoconfig_s390x
# Build took: 0:00:17.275824