# git rev-parse -q --verify 4f1cbe078546914538d8aabba04db984da68dcbf^{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 4f1cbe078546914538d8aabba04db984da68dcbf^{commit}
4f1cbe078546914538d8aabba04db984da68dcbf
# git checkout -q -f -B kisskb 4f1cbe078546914538d8aabba04db984da68dcbf
# git clean -qxdf
# < git log -1
# commit 4f1cbe078546914538d8aabba04db984da68dcbf
# Merge: 3e28fb0fcb69 4ed319c6ac08
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Fri Apr 5 15:34:33 2019 -1000
# 
#     Merge tag 'for-5.1/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
#     
#     Pull device mapper fixes from Mike Snitzer:
#     
#      - Two queue_limits stacking fixes: disable discards if underlying
#        driver does. And propagate BDI_CAP_STABLE_WRITES to fix sporadic
#        checksum errors.
#     
#      - Fix that reverts a DM core limit that wasn't needed given that
#        dm-crypt was already updated to impose an equivalent limit.
#     
#      - Fix dm-init to properly establish 'const' for __initconst array.
#     
#      - Fix deadlock in DM integrity target that occurs when overlapping IO
#        is being issued to it. And two smaller fixes to the DM integrity
#        target.
#     
#     * tag 'for-5.1/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
#       dm integrity: fix deadlock with overlapping I/O
#       dm: disable DISCARD if the underlying storage no longer supports it
#       dm table: propagate BDI_CAP_STABLE_WRITES to fix sporadic checksum errors
#       dm: revert 8f50e358153d ("dm: limit the max bio size as BIO_MAX_PAGES * PAGE_SIZE")
#       dm init: fix const confusion for dm_allowed_targets array
#       dm integrity: make dm_integrity_init and dm_integrity_exit static
#       dm integrity: change memcmp to strncmp in dm_integrity_ctr
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 4f1cbe078546914538d8aabba04db984da68dcbf
# < make -s -j 48 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-  randconfig
KCONFIG_SEED=0xBF6AB80C
# Added to kconfig CONFIG_STANDALONE=y
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# Added to kconfig CONFIG_CC_STACKPROTECTOR_STRONG=n
# Added to kconfig CONFIG_GCC_PLUGINS=n
# Added to kconfig CONFIG_GCC_PLUGIN_CYC_COMPLEXITY=n
# Added to kconfig CONFIG_GCC_PLUGIN_SANCOV=n
# Added to kconfig CONFIG_GCC_PLUGIN_LATENT_ENTROPY=n
# yes \n | make -s -j 48 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 48 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-  
You are building kernel with non-retpoline compiler.
Please update your compiler.
make[1]: *** [arch/x86/Makefile:308: checkbin] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:169: sub-make] Error 2
Command 'make -s -j 48 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus-rand_x86_64-randconfig_um-x86_64
# Build took: 0:00:07.198082