# git rev-parse -q --verify e00d8880481497474792d28c14479a9fb6752046^{commit}
e00d8880481497474792d28c14479a9fb6752046
already have revision, skipping fetch
# git checkout -q -f -B kisskb e00d8880481497474792d28c14479a9fb6752046
# git clean -qxdf
# < git log -1
# commit e00d8880481497474792d28c14479a9fb6752046
# Author: Masahiro Yamada <yamada.masahiro@socionext.com>
# Date:   Tue Jan 15 16:19:00 2019 +0900
# 
#     kbuild: mark prepare0 as PHONY to fix external module build
#     
#     Commit c3ff2a5193fa ("powerpc/32: add stack protector support")
#     caused kernel panic on PowerPC when an external module is used with
#     CONFIG_STACKPROTECTOR because the 'prepare' target was not executed
#     for the external module build.
#     
#     Commit e07db28eea38 ("kbuild: fix single target build for external
#     module") turned it into a build error because the 'prepare' target is
#     now executed but the 'prepare0' target is missing for the external
#     module build.
#     
#     External module on arm/arm64 with CONFIG_STACKPROTECTOR_PER_TASK is
#     also broken in the same way.
#     
#     Move 'PHONY += prepare0' to the common place. GNU Make is fine with
#     missing rule for phony targets. I also removed the comment which is
#     wrong irrespective of this commit.
#     
#     I minimize the change so it can be easily backported to 4.20.x
#     
#     To fix v4.20, please backport e07db28eea38 ("kbuild: fix single target
#     build for external module"), and then this commit.
#     
#     Link: https://bugzilla.kernel.org/show_bug.cgi?id=201891
#     Fixes: e07db28eea38 ("kbuild: fix single target build for external module")
#     Fixes: c3ff2a5193fa ("powerpc/32: add stack protector support")
#     Fixes: 189af4657186 ("ARM: smp: add support for per-task stack canaries")
#     Fixes: 0a1213fa7432 ("arm64: enable per-task stack canaries")
#     Cc: linux-stable <stable@vger.kernel.org> # v4.20
#     Reported-by: Samuel Holland <samuel@sholland.org>
#     Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru>
#     Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
#     Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
#     Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru>
# < /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 e00d8880481497474792d28c14479a9fb6752046
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/kbuild_44x_fsp2_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  44x/fsp2_defconfig
# make -s -j 120 ARCH=powerpc O=/kisskb/build/kbuild_44x_fsp2_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
INFO: Uncompressed kernel (size 0x8d864c) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x900000)
Image Name:   Linux-5.0.0-rc2-ge00d88804814
Created:      Fri Jan 18 02:26:29 2019
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    4007727 Bytes = 3913.80 KiB = 3.82 MiB
Load Address: 00000000
Entry Point:  00000000
Completed OK
# rm -rf /kisskb/build/kbuild_44x_fsp2_defconfig_powerpc-gcc5
# Build took: 0:00:41.267169