# git rev-parse -q --verify fc37a1632d40c80c067eb1bc235139f5867a2667^{commit}
fc37a1632d40c80c067eb1bc235139f5867a2667
already have revision, skipping fetch
# git checkout -q -f -B kisskb fc37a1632d40c80c067eb1bc235139f5867a2667
# git clean -qxdf
# < git log -1
# commit fc37a1632d40c80c067eb1bc235139f5867a2667
# Author: Desnes A. Nunes do Rosario <desnesn@linux.ibm.com>
# Date:   Thu Feb 27 10:47:15 2020 -0300
# 
#     powerpc: fix hardware PMU exception bug on PowerVM compatibility mode systems
#     
#     PowerVM systems running compatibility mode on a few Power8 revisions are
#     still vulnerable to the hardware defect that loses PMU exceptions arriving
#     prior to a context switch.
#     
#     The software fix for this issue is enabled through the CPU_FTR_PMAO_BUG
#     cpu_feature bit, nevertheless this bit also needs to be set for PowerVM
#     compatibility mode systems.
#     
#     Fixes: 68f2f0d431d9ea4 ("powerpc: Add a cpu feature CPU_FTR_PMAO_BUG")
#     Signed-off-by: Desnes A. Nunes do Rosario <desnesn@linux.ibm.com>
#     Reviewed-by: Leonardo Bras <leonardo@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20200227134715.9715-1-desnesn@linux.ibm.com
# < /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 fc37a1632d40c80c067eb1bc235139f5867a2667
# < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_walnut_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  40x/walnut_defconfig
# < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_walnut_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_walnut_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_walnut_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/arch/powerpc/kernel/head_40x.S: Assembler messages:
/kisskb/src/arch/powerpc/kernel/head_40x.S:804: Warning: invalid register expression
INFO: Uncompressed kernel (size 0x50c6d8) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x600000)
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_40x_walnut_defconfig_powerpc-gcc5
# Build took: 0:00:44.004714