# git rev-parse -q --verify 896066aa0685af3434637998b76218c2045142a8^{commit}
896066aa0685af3434637998b76218c2045142a8
already have revision, skipping fetch
# git checkout -q -f -B kisskb 896066aa0685af3434637998b76218c2045142a8
# git clean -qxdf
# < git log -1
# commit 896066aa0685af3434637998b76218c2045142a8
# Author: Harish <harish@linux.ibm.com>
# Date:   Thu Jun 25 22:27:21 2020 +0530
# 
#     selftests/powerpc: Fix build failure in ebb tests
#     
#     We use OUTPUT directory as TMPOUT for checking no-pie option.
#     
#     Since commit f2f02ebd8f38 ("kbuild: improve cc-option to clean up all
#     temporary files") when building powerpc/ from selftests directory, the
#     OUTPUT directory points to powerpc/pmu/ebb/ and gets removed when
#     checking for -no-pie option in try-run routine, subsequently build
#     fails with the following:
#     
#       $ make -C powerpc
#       ...
#       TARGET=ebb; BUILD_TARGET=$OUTPUT/$TARGET; mkdir -p $BUILD_TARGET; make OUTPUT=$BUILD_TARGET -k -C $TARGET all
#       make[2]: Entering directory '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb'
#       make[2]: *** No rule to make target 'Makefile'.
#       make[2]: Failed to remake makefile 'Makefile'.
#       make[2]: *** No rule to make target 'ebb.c', needed by '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test'.
#       make[2]: *** No rule to make target 'ebb_handler.S', needed by '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test'.
#       make[2]: *** No rule to make target 'trace.c', needed by '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test'.
#       make[2]: *** No rule to make target 'busy_loop.S', needed by '/home/linux-master/tools/testing/selftests/powerpc/pmu/ebb/reg_access_test'.
#       make[2]: Target 'all' not remade because of errors.
#     
#     Fix this by adding a suffix to the OUTPUT directory so that the
#     failure is avoided.
#     
#     Fixes: 9686813f6e9d ("selftests/powerpc: Fix try-run when source tree is not writable")
#     Signed-off-by: Harish <harish@linux.ibm.com>
#     [mpe: Mention that commit that triggered the breakage]
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20200625165721.264904-1-harish@linux.ibm.com
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 896066aa0685af3434637998b76218c2045142a8
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pasemi_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  pasemi_defconfig
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pasemi_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pasemi_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pasemi_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_pasemi_defconfig_powerpc-gcc4.9
# Build took: 0:01:21.062000