# git rev-parse -q --verify 2e839bed5f405e0d184bb6041df48270e8846033^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/linuxppc/linux.git next-test
# git rev-parse -q --verify 2e839bed5f405e0d184bb6041df48270e8846033^{commit}
2e839bed5f405e0d184bb6041df48270e8846033
# git checkout -q -f -B kisskb 2e839bed5f405e0d184bb6041df48270e8846033
# git clean -qxdf
# < git log -1
# commit 2e839bed5f405e0d184bb6041df48270e8846033
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Sun Oct 13 21:23:51 2019 +1100
# 
#     powerpc/pseries: Mark accumulate_stolen_time() as notrace
#     
#     accumulate_stolen_time() is called prior to interrupt state being
#     reconciled, which can trip the warning in arch_local_irq_restore():
#     
#       WARNING: CPU: 5 PID: 1017 at arch/powerpc/kernel/irq.c:258 .arch_local_irq_restore+0x9c/0x130
#       ...
#       NIP .arch_local_irq_restore+0x9c/0x130
#       LR  .rb_start_commit+0x38/0x80
#       Call Trace:
#         .ring_buffer_lock_reserve+0xe4/0x620
#         .trace_function+0x44/0x210
#         .function_trace_call+0x148/0x170
#         .ftrace_ops_no_ops+0x180/0x1d0
#         ftrace_call+0x4/0x8
#         .accumulate_stolen_time+0x1c/0xb0
#         decrementer_common+0x124/0x160
#     
#     For now just mark it as notrace. We may change the ordering to call it
#     after interrupt state has been reconciled, but that is a larger
#     change.
#     
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20191024055932.27940-1-mpe@ellerman.id.au
# < /opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-gcc --version
# < /opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-ld --version
# < git log --format=%s --max-count=1 2e839bed5f405e0d184bb6041df48270e8846033
# < make -s -j 24 ARCH=sparc64 O=/kisskb/build/powerpc-next_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  defconfig
# make -s -j 24 ARCH=sparc64 O=/kisskb/build/powerpc-next_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  
<stdin>:1511:2: warning: #warning syscall clone3 not implemented [-Wcpp]
WARNING: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.
WARNING: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.
  kernel: arch/sparc/boot/image is ready
  kernel: arch/sparc/boot/zImage is ready
Completed OK
# rm -rf /kisskb/build/powerpc-next_sparc64-defconfig_sparc64
# Build took: 0:01:44.195207