# git rev-parse -q --verify 66f93c5a02d5ba6ef17fef459143961382593212^{commit}
66f93c5a02d5ba6ef17fef459143961382593212
already have revision, skipping fetch
# git checkout -q -f -B kisskb 66f93c5a02d5ba6ef17fef459143961382593212
# git clean -qxdf
# < git log -1
# commit 66f93c5a02d5ba6ef17fef459143961382593212
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Thu Nov 15 12:34:27 2018 +1000
# 
#     powerpc/64: Fix kernel stack 16-byte alignment
#     
#     Commit 4c2de74cc869 ("powerpc/64: Interrupts save PPR on stack rather
#     than thread_struct") changed sizeof(struct pt_regs) % 16 from 0 to 8,
#     which causes the interrupt frame allocation on kernel entry to put the
#     kernel stack out of alignment.
#     
#     Quadword (16-byte) alignment for the stack is required by both the
#     64-bit v1 ABI (v1.9 § 3.2.2) and the 64-bit v2 ABI (v1.1 § 2.2.2.1).
#     
#     Add a pad field to fix alignment, and add a BUILD_BUG_ON to catch this
#     in future.
#     
#     Fixes: 4c2de74cc869 ("powerpc/64: Interrupts save PPR on stack rather than thread_struct")
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < git log --format=%s --max-count=1 66f93c5a02d5ba6ef17fef459143961382593212
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powernv_defconfig+NO_NUMA_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# Added to kconfig CONFIG_NUMA=n
# yes \n | make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powernv_defconfig+NO_NUMA_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_powernv_defconfig+NO_NUMA_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: modpost: Found 2 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_powernv_defconfig+NO_NUMA_ppc64le-gcc5
# Build took: 0:00:56.071769