# git rev-parse -q --verify 9dfbf78e4114fcaf4ef61c49885c3ab5bad40d0b^{commit}
9dfbf78e4114fcaf4ef61c49885c3ab5bad40d0b
already have revision, skipping fetch
# git checkout -q -f -B kisskb 9dfbf78e4114fcaf4ef61c49885c3ab5bad40d0b
# git clean -qxdf
# < git log -1
# commit 9dfbf78e4114fcaf4ef61c49885c3ab5bad40d0b
# Author: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
# Date:   Thu Jan 18 00:33:36 2018 +0530
# 
#     powerpc/64s: Default l1d_size to 64K in RFI fallback flush
#     
#     If there is no d-cache-size property in the device tree, l1d_size could
#     be zero. We don't actually expect that to happen, it's only been seen
#     on mambo (simulator) in some configurations.
#     
#     A zero-size l1d_size leads to the loop in the asm wrapping around to
#     2^64-1, and then walking off the end of the fallback area and
#     eventually causing a page fault which is fatal.
#     
#     Just default to 64K which is correct on some CPUs, and sane enough to
#     not cause a crash on others.
#     
#     Fixes: aa8a5e0062ac9 ('powerpc/64s: Add support for RFI flush of L1-D cache')
#     Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
#     [mpe: Rewrite comment and change log]
#     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 9dfbf78e4114fcaf4ef61c49885c3ab5bad40d0b
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_le_defconfig+NO_SPLPAR_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-  pseries_le_defconfig
# Added to kconfig CONFIG_PPC_SPLPAR=n
# yes \n | make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_le_defconfig+NO_SPLPAR_ppc64le CROSS_COMPILE=/opt/cross/kisskb/gcc-5.2.0-nolibc/powerpc64le-linux/bin/powerpc64le-linux-  oldconfig
yes: standard output: Broken pipe
yes: write error
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_le_defconfig+NO_SPLPAR_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-fixes_pseries_le_defconfig+NO_SPLPAR_ppc64le
# Build took: 0:03:16.728398