# git rev-parse -q --verify 459e3a21535ae3c7a9a123650e54f5c882b8fcbf^{commit}
459e3a21535ae3c7a9a123650e54f5c882b8fcbf
already have revision, skipping fetch
# git checkout -q -f -B kisskb 459e3a21535ae3c7a9a123650e54f5c882b8fcbf
# git clean -qxdf
# < git log -1
# commit 459e3a21535ae3c7a9a123650e54f5c882b8fcbf
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed May 1 11:20:53 2019 -0700
# 
#     gcc-9: properly declare the {pv,hv}clock_page storage
#     
#     The pvlock_page and hvclock_page variables are (as the name implies)
#     addresses to pages, created by the linker script.
#     
#     But we declared them as just "extern u8" variables, which _works_, but
#     now that gcc does some more bounds checking, it causes warnings like
#     
#         warning: array subscript 1 is outside array bounds of ‘u8[1]’
#     
#     when we then access more than one byte from those variables.
#     
#     Fix this by simply making the declaration of the variables match
#     reality, which makes the compiler happy too.
#     
#     Signed-off-by: Linus Torvalds <torvalds@-linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 459e3a21535ae3c7a9a123650e54f5c882b8fcbf
# < make -s -j 48 ARCH=arm64 O=/kisskb/build/linus_arm64-allmodconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  allmodconfig
# make -s -j 48 ARCH=arm64 O=/kisskb/build/linus_arm64-allmodconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  
Completed OK
# rm -rf /kisskb/build/linus_arm64-allmodconfig_arm64-gcc8
# Build took: 0:24:18.804148