# git rev-parse -q --verify fedb8da96355f5f64353625bf96dc69423ad1826^{commit}
fedb8da96355f5f64353625bf96dc69423ad1826
already have revision, skipping fetch
# git checkout -q -f -B kisskb fedb8da96355f5f64353625bf96dc69423ad1826
# git clean -qxdf
# < git log -1
# commit fedb8da96355f5f64353625bf96dc69423ad1826
# Author: John David Anglin <dave.anglin@bell.net>
# Date:   Sun Aug 5 13:30:31 2018 -0400
# 
#     parisc: Define mb() and add memory barriers to assembler unlock sequences
#     
#     For years I thought all parisc machines executed loads and stores in
#     order. However, Jeff Law recently indicated on gcc-patches that this is
#     not correct. There are various degrees of out-of-order execution all the
#     way back to the PA7xxx processor series (hit-under-miss). The PA8xxx
#     series has full out-of-order execution for both integer operations, and
#     loads and stores.
#     
#     This is described in the following article:
#     http://web.archive.org/web/20040214092531/http://www.cpus.hp.com/technical_references/advperf.shtml
#     
#     For this reason, we need to define mb() and to insert a memory barrier
#     before the store unlocking spinlocks. This ensures that all memory
#     accesses are complete prior to unlocking. The ldcw instruction performs
#     the same function on entry.
#     
#     Signed-off-by: John David Anglin <dave.anglin@bell.net>
#     Cc: stable@vger.kernel.org # 4.0+
#     Signed-off-by: Helge Deller <deller@gmx.de>
# < /opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-gcc --version
# < git log --format=%s --max-count=1 fedb8da96355f5f64353625bf96dc69423ad1826
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/linus_pseries_le_defconfig+NO_NUMA_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-  pseries_le_defconfig
# Added to kconfig CONFIG_NUMA=n
# make -s -j 120 ARCH=powerpc O=/kisskb/build/linus_pseries_le_defconfig+NO_NUMA_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-  olddefconfig
# make -s -j 120 ARCH=powerpc O=/kisskb/build/linus_pseries_le_defconfig+NO_NUMA_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/linus_pseries_le_defconfig+NO_NUMA_ppc64le
# Build took: 0:00:53.258785