# git rev-parse -q --verify 7f08c318df48fbcfc16a1cfbfad6818542510d57^{commit}
7f08c318df48fbcfc16a1cfbfad6818542510d57
already have revision, skipping fetch
# git checkout -q -f -B kisskb 7f08c318df48fbcfc16a1cfbfad6818542510d57
# git clean -qxdf
# < git log -1
# commit 7f08c318df48fbcfc16a1cfbfad6818542510d57
# Author: Kajol Jain <kjain@linux.ibm.com>
# Date:   Fri Feb 14 13:36:06 2020 +0530
# 
#     powerpc/kernel/sysfs: Add new config option PMU_SYSFS to enable PMU SPRs sysfs file creation
#     
#     Many of the performance monitoring unit (PMU) SPRs are
#     exposed in the sysfs. This may not be a desirable since
#     "perf" API is the primary interface to program PMU and
#     collect counter data in the system. But that said, we
#     cant remove these sysfs files since we dont whether
#     anyone/anything is using them.
#     
#     So the patch adds a new CONFIG option 'CONFIG_PMU_SYSFS'
#     (user selectable) to be used in sysfs file creation for
#     PMU SPRs. New option by default is disabled, but can be
#     enabled if user needs it.
#     
#     Tested this patch behaviour in powernv and pseries machines.
#     Patch is also tested for pmac32_defconfig.
#     
#     Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
#     Tested-by: Nageswara R Sastry <nasastry@in.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20200214080606.26872-2-kjain@linux.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 7f08c318df48fbcfc16a1cfbfad6818542510d57
# < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_RADIX_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# Added to kconfig CONFIG_PPC_RADIX_MMU=n
# yes \n | make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_RADIX_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 80 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_RADIX_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: vmlinux.o(.text+0x2bc8): 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-next_powernv_defconfig+NO_RADIX_powerpc-gcc8
# Build took: 0:03:29.417083