# git rev-parse -q --verify fe663df7825811358531dc2e8a52d9eaa5e3515e^{commit}
fe663df7825811358531dc2e8a52d9eaa5e3515e
already have revision, skipping fetch
# git checkout -q -f -B kisskb fe663df7825811358531dc2e8a52d9eaa5e3515e
# git clean -qxdf
# < git log -1
# commit fe663df7825811358531dc2e8a52d9eaa5e3515e
# Author: Anders Roxell <anders.roxell@linaro.org>
# Date:   Fri Feb 11 01:51:13 2022 +0100
# 
#     powerpc/lib/sstep: fix 'ptesync' build error
#     
#     Building tinyconfig with gcc (Debian 11.2.0-16) and assembler (Debian
#     2.37.90.20220207) the following build error shows up:
#     
#       {standard input}: Assembler messages:
#       {standard input}:2088: Error: unrecognized opcode: `ptesync'
#       make[3]: *** [/builds/linux/scripts/Makefile.build:287: arch/powerpc/lib/sstep.o] Error 1
#     
#     Add the 'ifdef CONFIG_PPC64' around the 'ptesync' in function
#     'emulate_update_regs()' to like it is in 'analyse_instr()'. Since it looks like
#     it got dropped inadvertently by commit 3cdfcbfd32b9 ("powerpc: Change
#     analyse_instr so it doesn't modify *regs").
#     
#     A key detail is that analyse_instr() will never recognise lwsync or
#     ptesync on 32-bit (because of the existing ifdef), and as a result
#     emulate_update_regs() should never be called with an op specifying
#     either of those on 32-bit. So removing them from emulate_update_regs()
#     should be a nop in terms of runtime behaviour.
#     
#     Fixes: 3cdfcbfd32b9 ("powerpc: Change analyse_instr so it doesn't modify *regs")
#     Cc: stable@vger.kernel.org # v4.14+
#     Suggested-by: Arnd Bergmann <arnd@arndb.de>
#     Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
#     [mpe: Add last paragraph of change log mentioning analyse_instr() details]
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20220211005113.1361436-1-anders.roxell@linaro.org
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-ld --version
# < git log --format=%s --max-count=1 fe663df7825811358531dc2e8a52d9eaa5e3515e
# < make -s -j 32 ARCH=s390 O=/kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-  defconfig
# < make -s -j 32 ARCH=s390 O=/kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-  help
# make -s -j 32 ARCH=s390 O=/kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-  olddefconfig
# make -s -j 32 ARCH=s390 O=/kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-  
  MKDIR     /kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc8/tools/bpf/resolve_btfids/libbpf/
  MKDIR     /kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc8/tools/bpf/resolve_btfids//libsubcmd
  LINK     resolve_btfids
BTF: .tmp_vmlinux.btf: pahole version v1.12 is too old, need at least v1.16
Failed to generate BTF for vmlinux
Try to disable CONFIG_DEBUG_INFO_BTF
make[1]: *** [/kisskb/src/Makefile:1155: vmlinux] Error 1
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 32 ARCH=s390 O=/kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/s390-linux/bin/s390-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/powerpc-fixes_s390-defconfig_s390x-gcc8
# Build took: 0:02:57.767270