# git rev-parse -q --verify 85f78456f286da46fb054c7d45e4193cb757ac83^{commit}
85f78456f286da46fb054c7d45e4193cb757ac83
already have revision, skipping fetch
# git checkout -q -f -B kisskb 85f78456f286da46fb054c7d45e4193cb757ac83
# git clean -qxdf
# < git log -1
# commit 85f78456f286da46fb054c7d45e4193cb757ac83
# Merge: cacf02df4b84 574d356b7a02
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Jan 2 12:11:01 2019 -0800
# 
#     Merge tag '9p-for-4.21' of git://github.com/martinetd/linux
#     
#     Pull 9p updates from Dominique Martinet:
#      "Missing prototype warning fix and a syzkaller fix when a 9p server
#       advertises a too small msize"
#     
#     * tag '9p-for-4.21' of git://github.com/martinetd/linux:
#       9p/net: put a lower bound on msize
#       net/9p: include trans_common.h to fix missing prototype warning.
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 85f78456f286da46fb054c7d45e4193cb757ac83
# < make -s -j 10 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  x86_64_defconfig
# make -s -j 10 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  
You are building kernel with non-retpoline compiler.
Please update your compiler.
make[1]: *** [arch/x86/Makefile:300: checkbin] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:152: sub-make] Error 2
Command 'make -s -j 10 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_x86_64_defconfig_x86_64
# Build took: 0:00:03.822328