# git rev-parse -q --verify e6037a753e8e9a4146f7d94c32eb30a6717c9c70^{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 e6037a753e8e9a4146f7d94c32eb30a6717c9c70^{commit}
e6037a753e8e9a4146f7d94c32eb30a6717c9c70
# git checkout -q -f -B kisskb e6037a753e8e9a4146f7d94c32eb30a6717c9c70
# git clean -qxdf
# < git log -1
# commit e6037a753e8e9a4146f7d94c32eb30a6717c9c70
# Author: Jason A. Donenfeld <Jason@zx2c4.com>
# Date:   Thu Oct 15 01:02:09 2020 +0200
# 
#     powerpc32: don't adjust unmoved stack pointer in csum_partial_copy_generic() epilogue
#     
#     A recent change to the checksum code removed usage of some extra
#     arguments, alongside with storage on the stack for those, and the stack
#     pointer no longer needed to be adjusted in the function prologue.
#     
#     But a left over subtraction wasn't removed in the function epilogue,
#     causing the function to return with the stack pointer moved 16 bytes
#     away from where it should have.  This corrupted local state and lead to
#     weird crashes.
#     
#     This simply removes the leftover instruction from the epilogue.
#     
#     Fixes: 70d65cd555c5 ("ppc: propagate the calling conventions change down to csum_partial_copy_generic()")
#     Cc: Al Viro <viro@zeniv.linux.org.uk>
#     Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /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 e6037a753e8e9a4146f7d94c32eb30a6717c9c70
# < make -s -j 8 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=0x14B49881
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# < make -s -j 8 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-  help
# make -s -j 8 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-  olddefconfig
# make -s -j 8 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:25: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
arch/arm64/Makefile:25: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
Completed OK
# rm -rf /kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4
# Build took: 0:05:00.447977