# git rev-parse -q --verify 7acf50e4efa60270edcb95107f660f5e258a90f2^{commit}
7acf50e4efa60270edcb95107f660f5e258a90f2
already have revision, skipping fetch
# git checkout -q -f -B kisskb 7acf50e4efa60270edcb95107f660f5e258a90f2
# git clean -qxdf
# < git log -1
# commit 7acf50e4efa60270edcb95107f660f5e258a90f2
# Author: Balbir Singh <bsingharora@gmail.com>
# Date:   Tue May 1 12:57:25 2018 +1000
# 
#     Revert "powerpc/powernv: Increase memory block size to 1GB on radix"
#     
#     This commit was a stop-gap to prevent crashes on hotunplug, caused by
#     the mismatch between the 1G mappings used for the linear mapping and the
#     memory block size. Those issues are now resolved because we split the
#     linear mapping at hotunplug time if necessary, as implemented in commit
#     4dd5f8a99e79 ("powerpc/mm/radix: Split linear mapping on hot-unplug").
#     
#     Signed-off-by: Balbir Singh <bsingharora@gmail.com>
#     Signed-off-by: Michael Neuling <mikey@neuling.org>
#     Tested-by: Rashmica Gupta <rashmica.g@gmail.com>
#     Tested-by: Balbir Singh <bsingharora@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-gcc --version
# < git log --format=%s --max-count=1 7acf50e4efa60270edcb95107f660f5e258a90f2
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_skiroot_defconfig_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-  skiroot_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_skiroot_defconfig_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-  
WARNING: modpost: Found 3 section mismatch(es).
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'
Completed OK
# rm -rf /kisskb/build/powerpc-next_skiroot_defconfig_ppc64le
# Build took: 0:01:23.293270