# git rev-parse -q --verify 249fad734a25889a4f23ed014d43634af6798063^{commit}
249fad734a25889a4f23ed014d43634af6798063
already have revision, skipping fetch
# git checkout -q -f -B kisskb 249fad734a25889a4f23ed014d43634af6798063
# git clean -qxdf
# < git log -1
# commit 249fad734a25889a4f23ed014d43634af6798063
# Author: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
# Date:   Mon Nov 18 09:14:52 2019 +0530
# 
#     powerpc/perf: Disable trace_imc pmu
#     
#     When a root user or a user with CAP_SYS_ADMIN privilege uses any
#     trace_imc performance monitoring unit events, to monitor application
#     or KVM threads, it may result in a checkstop (System crash).
#     
#     The cause is frequent switching of the "trace/accumulation" mode of
#     the In-Memory Collection hardware (LDBAR).
#     
#     This patch disables the trace_imc PMU unit entirely to avoid
#     triggering the checkstop. A future patch will reenable it at a later
#     stage once a workaround has been developed.
#     
#     Fixes: 012ae244845f ("powerpc/perf: Trace imc PMU functions")
#     Cc: stable@vger.kernel.org # v5.2+
#     Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
#     Tested-by: Hariharan T.S. <hari@linux.ibm.com>
#     [mpe: Add pr_info_once() so dmesg shows the PMU has been disabled]
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20191118034452.9939-1-maddy@linux.vnet.ibm.com
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 249fad734a25889a4f23ed014d43634af6798063
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_le_defconfig+NO_NUMA_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  pseries_le_defconfig
# Added to kconfig CONFIG_NUMA=n
# yes \n | make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_le_defconfig+NO_NUMA_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_le_defconfig+NO_NUMA_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: vmlinux.o(.text+0x31dc): Section mismatch in reference from the variable __boot_from_prom to the function .init.text:prom_init()
The function __boot_from_prom() references
the function __init prom_init().
This is often because __boot_from_prom lacks a __init 
annotation or the annotation of prom_init is wrong.

WARNING: vmlinux.o(.text+0x33c8): Section mismatch in reference from the variable start_here_common to the function .init.text:start_kernel()
The function start_here_common() references
the function __init start_kernel().
This is often because start_here_common lacks a __init 
annotation or the annotation of start_kernel is wrong.

Completed OK
# rm -rf /kisskb/build/powerpc-fixes_pseries_le_defconfig+NO_NUMA_powerpc-gcc8
# Build took: 0:03:35.787607