# git rev-parse -q --verify 179079a0e1e136e52f0ab1fcb748ed587068411e^{commit}
179079a0e1e136e52f0ab1fcb748ed587068411e
already have revision, skipping fetch
# git checkout -q -f -B kisskb 179079a0e1e136e52f0ab1fcb748ed587068411e
# git clean -qxdf
# < git log -1
# commit 179079a0e1e136e52f0ab1fcb748ed587068411e
# Author: Masahiro Yamada <masahiroy@kernel.org>
# Date:   Wed Mar 6 21:47:09 2024 +0900
# 
#     kbuild: remove GCC's default -Wpacked-bitfield-compat flag
#     
#     Commit 4a5838ad9d2d ("kbuild: Add extra gcc checks") added the
#     -Wpacked-bitfield-compat flag, but it was unneeded.
#     
#     GCC manual says:
#       "This warning is enabled by default. Use -Wno-packed-bitfield-compat
#        to disable this warning."
#     
#     The test code in the manual:
#     
#       struct foo
#       {
#         char a:4;
#         char b:8;
#       } __attribute__ ((packed));
#     
#     ... emits "note: offset of packed bit-field ‘b’ has changed in GCC 4.4"
#     without W=3.
#     
#     Let's remove it, as it is a default with GCC.
#     
#     Clang does not support this flag, so its removal will not affect Clang
#     builds.
#     
#     Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
#     Reviewed-by: Nathan Chancellor <nathan@kernel.org>
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 179079a0e1e136e52f0ab1fcb748ed587068411e
# make -s -j 40 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# < make -s -j 40 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 40 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 40 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
Completed OK
# rm -rf /kisskb/build/kbuild_powernv_defconfig_powerpc-gcc5
# Build took: 0:01:46.629946