# git rev-parse -q --verify 90a353491e9f95516fcfd33ae7331d638557416c^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/mirror/linux-kbuild.git for-next
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 90a353491e9f95516fcfd33ae7331d638557416c^{commit}
90a353491e9f95516fcfd33ae7331d638557416c
# git checkout -q -f -B kisskb 90a353491e9f95516fcfd33ae7331d638557416c
# git clean -qxdf
# < git log -1
# commit 90a353491e9f95516fcfd33ae7331d638557416c
# Author: Masahiro Yamada <masahiroy@kernel.org>
# Date:   Tue Aug 31 16:39:57 2021 +0900
# 
#     kbuild: reuse $(cmd_objtool) for cmd_cc_lto_link_modules
#     
#     For CONFIG_LTO_CLANG=y, the objtool processing is not possible at the
#     compilation, hence postponed by the link time.
#     
#     Reuse $(cmd_objtool) for CONFIG_LTO_CLANG=y by defining objtool-enabled
#     properly.
#     
#     For CONFIG_LTO_CLANG=y:
#     
#       objtool-enabled is off for %.o compilation
#       objtool-enabled is on  for %.lto link
#     
#     For CONFIG_LTO_CLANG=n:
#     
#       objtool-enabled is on for %.o compilation
#           (but, it depends on OBJECT_FILE_NON_STANDARD)
#     
#     Set part-of-module := y for %.lto.o to avoid repeating --module.
#     
#     Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
#     Reviewed-by: Kees Cook <keescook@chromium.org>
#     Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 90a353491e9f95516fcfd33ae7331d638557416c
# < make -s -j 32 ARCH=x86 O=/kisskb/build/kbuild_x86_64_defconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  x86_64_defconfig
# < make -s -j 32 ARCH=x86 O=/kisskb/build/kbuild_x86_64_defconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  help
# make -s -j 32 ARCH=x86 O=/kisskb/build/kbuild_x86_64_defconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  olddefconfig
# make -s -j 32 ARCH=x86 O=/kisskb/build/kbuild_x86_64_defconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
Completed OK
# rm -rf /kisskb/build/kbuild_x86_64_defconfig_x86_64-gcc11
# Build took: 0:01:44.447409