# git rev-parse -q --verify 03182211c6e6458ef67ee66ed4c71c8ff7791a2d^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/linuxppc/linux.git next-test
# git rev-parse -q --verify 03182211c6e6458ef67ee66ed4c71c8ff7791a2d^{commit}
03182211c6e6458ef67ee66ed4c71c8ff7791a2d
# git checkout -q -f -B kisskb 03182211c6e6458ef67ee66ed4c71c8ff7791a2d
# git clean -qxdf
# < git log -1
# commit 03182211c6e6458ef67ee66ed4c71c8ff7791a2d
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Wed Jul 21 00:15:04 2021 +1000
# 
#     powerpc/64s/perf: Always use SIAR for kernel interrupts
#     
#     If an interrupt is taken in kernel mode, always use SIAR for it rather than
#     looking at regs_sipr. This prevents samples piling up around interrupt
#     enable (hard enable or interrupt replay via soft enable) in PMUs / modes
#     where the PR sample indication is not in synch with SIAR.
#     
#     This results in better sampling of interrupt entry and exit in particular.
#     
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     Tested-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20210720141504.420110-1-npiggin@gmail.com
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 03182211c6e6458ef67ee66ed4c71c8ff7791a2d
# < make -s -j 120 ARCH=arm64 O=/kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  defconfig
# < make -s -j 120 ARCH=arm64 O=/kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  help
# make -s -j 120 ARCH=arm64 O=/kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  olddefconfig
# make -s -j 120 ARCH=arm64 O=/kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  
/kisskb/src/arch/arm64/Makefile:25: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
/kisskb/src/arch/arm64/Makefile:33: LSE atomics not supported by binutils
Completed OK
# rm -rf /kisskb/build/powerpc-next_arm64-defconfig_arm64-gcc5.4
# Build took: 0:03:11.395583