# git rev-parse -q --verify b1fbfcb4a20949df08dd995927cdc5ad220c128d^{commit}
b1fbfcb4a20949df08dd995927cdc5ad220c128d
already have revision, skipping fetch
# git checkout -q -f -B kisskb b1fbfcb4a20949df08dd995927cdc5ad220c128d
# git clean -qxdf
# < git log -1
# commit b1fbfcb4a20949df08dd995927cdc5ad220c128d
# Author: Masahiro Yamada <yamada.masahiro@socionext.com>
# Date:   Mon Nov 18 13:52:47 2019 +0900
# 
#     kbuild: make single target builds even faster
#     
#     Commit 2dffd23f81a3 ("kbuild: make single target builds much faster")
#     made the situation much better.
#     
#     To improve it even more, apply the similar idea to the top Makefile.
#     Trim unrelated directories from build-dirs.
#     
#     The single build code must be moved above the 'descend' target.
#     
#     Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
#     Tested-by: Jens Axboe <axboe@kernel.dk>
# < /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 b1fbfcb4a20949df08dd995927cdc5ad220c128d
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/kbuild_pmac32_defconfig+SMP_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  pmac32_defconfig
# Added to kconfig CONFIG_SMP=y
# yes \n | make -s -j 48 ARCH=powerpc O=/kisskb/build/kbuild_pmac32_defconfig+SMP_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 48 ARCH=powerpc O=/kisskb/build/kbuild_pmac32_defconfig+SMP_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
In file included from /kisskb/src/sound/ppc/pmac.h:12:0,
                 from /kisskb/src/sound/ppc/awacs.c:16:
/kisskb/src/sound/ppc/awacs.c: In function 'snd_pmac_awacs_init':
/kisskb/src/include/sound/control.h:208:9: warning: 'speaker_vol' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return _snd_ctl_add_slave(master, slave, 0);
         ^
/kisskb/src/sound/ppc/awacs.c:873:36: note: 'speaker_vol' was declared here
  struct snd_kcontrol *master_vol, *speaker_vol;
                                    ^
INFO: Uncompressed kernel (size 0x940bfc) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0xa00000)
Completed OK
# rm -rf /kisskb/build/kbuild_pmac32_defconfig+SMP_powerpc-gcc5
# Build took: 0:01:35.415942