# git rev-parse -q --verify b7a2d47af3a0d58527e3a53ab85f597cd495b7ce^{commit}
b7a2d47af3a0d58527e3a53ab85f597cd495b7ce
already have revision, skipping fetch
# git checkout -q -f -B kisskb b7a2d47af3a0d58527e3a53ab85f597cd495b7ce
# git clean -qxdf
# < git log -1
# commit b7a2d47af3a0d58527e3a53ab85f597cd495b7ce
# Author: Jordan Niethe <jniethe5@gmail.com>
# Date:   Mon Feb 8 14:29:57 2021 +1100
# 
#     selftests/powerpc: Test for spurious kernel memory faults on radix
#     
#     Previously when mapping kernel memory on radix, no ptesync was
#     included which would periodically lead to unhandled spurious faults.
#     Mapping kernel memory is used when code patching with Strict RWX
#     enabled. As suggested by Chris Riedl, turning ftrace on and off does a
#     large amount of code patching so is a convenient way to see this kind
#     of fault.
#     
#     Add a selftest to try and trigger this kind of a spurious fault. It
#     tests for 30 seconds which is usually long enough for the issue to
#     show up.
#     
#     Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
#     [mpe: Rename it to better reflect what it does, rather than the symptom]
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20210208032957.1232102-2-jniethe5@gmail.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 b7a2d47af3a0d58527e3a53ab85f597cd495b7ce
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_mvme5100_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  mvme5100_defconfig
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_mvme5100_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_mvme5100_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_mvme5100_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
00000a78 R_PPC_REL24       _restgpr_31_x
arch/powerpc/kernel/vdso32/vdso32.so.dbg: dynamic relocations are not supported
make[2]: *** [/kisskb/src/arch/powerpc/kernel/vdso32/Makefile:54: arch/powerpc/kernel/vdso32/vdso32.so.dbg] Error 1
make[1]: *** [arch/powerpc/Makefile:425: vdso_prepare] Error 2
make: *** [Makefile:185: __sub-make] Error 2
Command 'make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_mvme5100_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/powerpc-next_mvme5100_defconfig_powerpc-gcc5
# Build took: 0:00:09.444414