# git rev-parse -q --verify 9b3b353ef330e20bc2d99bf3165cc044cff26a09^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
# git rev-parse -q --verify 9b3b353ef330e20bc2d99bf3165cc044cff26a09^{commit}
9b3b353ef330e20bc2d99bf3165cc044cff26a09
# git checkout -q -f -B kisskb 9b3b353ef330e20bc2d99bf3165cc044cff26a09
# git clean -qxdf
# < git log -1
# commit 9b3b353ef330e20bc2d99bf3165cc044cff26a09
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Mon Sep 27 11:26:21 2021 -0700
# 
#     vboxfs: fix broken legacy mount signature checking
#     
#     Commit 9d682ea6bcc7 ("vboxsf: Fix the check for the old binary
#     mount-arguments struct") was meant to fix a build error due to sign
#     mismatch in 'char' and the use of character constants, but it just moved
#     the error elsewhere, in that on some architectures characters and signed
#     and on others they are unsigned, and that's just how the C standard
#     works.
#     
#     The proper fix is a simple "don't do that then".  The code was just
#     being silly and odd, and it should never have cared about signed vs
#     unsigned characters in the first place, since what it is testing is not
#     four "characters", but four bytes.
#     
#     And the way to compare four bytes is by using "memcmp()".
#     
#     Which compilers will know to just turn into a single 32-bit compare with
#     a constant, as long as you don't have crazy debug options enabled.
#     
#     Link: https://lore.kernel.org/lkml/20210927094123.576521-1-arnd@kernel.org/
#     Cc: Arnd Bergmann <arnd@kernel.org>
#     Cc: Hans de Goede <hdegoede@redhat.com>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 9b3b353ef330e20bc2d99bf3165cc044cff26a09
# < make -s -j 80 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  randconfig
# Added to kconfig CONFIG_STANDALONE=y
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_CPU_BIG_ENDIAN=y
# Added to kconfig CONFIG_PPC64=y
# Added to kconfig CONFIG_PPC_DISABLE_WERROR=y
# Added to kconfig CONFIG_SECTION_MISMATCH_WARN_ONLY=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_LD_HEAD_STUB_CATCH=y
# Added to kconfig CONFIG_TRIM_UNUSED_KSYMS=n
# Added to kconfig CONFIG_UBSAN=n
# < make -s -j 80 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 80 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
.config:3972:warning: override: reassigning to symbol PPC64
.config:3973:warning: override: reassigning to symbol PPC_DISABLE_WERROR
.config:3974:warning: override: reassigning to symbol SECTION_MISMATCH_WARN_ONLY
.config:3975:warning: override: reassigning to symbol PREVENT_FIRMWARE_BUILD
.config:3977:warning: override: reassigning to symbol GCC_PLUGINS
# make -s -j 80 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
Completed OK
# rm -rf /kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc11
# Build took: 0:05:33.485838