# git rev-parse -q --verify c8635bc26fc137c218cba3b48a834a667e3ac790^{commit}
c8635bc26fc137c218cba3b48a834a667e3ac790
already have revision, skipping fetch
# git checkout -q -f -B kisskb c8635bc26fc137c218cba3b48a834a667e3ac790
# git clean -qxdf
# < git log -1
# commit c8635bc26fc137c218cba3b48a834a667e3ac790
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Sun May 13 14:21:06 2018 +1000
# 
#     powerpc/64s/radix: optimise pte_update
#     
#     Implementing pte_update with pte_xchg (which uses cmpxchg) is
#     inefficient. A single larx/stcx. works fine, no need for the less
#     efficient cmpxchg sequence.
#     
#     Then remove the memory barriers from the operation. There is a
#     requirement for TLB flushing to load mm_cpumask after the store
#     that reduces pte permissions, which is moved into the TLB flush
#     code.
#     
#     Signed-off-by: Nicholas Piggin <npiggin@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 c8635bc26fc137c218cba3b48a834a667e3ac790
# < make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_pseries_le_defconfig_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-  pseries_le_defconfig
# make -s -j 80 ARCH=powerpc O=/kisskb/build/powerpc-next_pseries_le_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_pseries_le_defconfig_ppc64le
# Build took: 0:02:59.764601