# git rev-parse -q --verify 5694cecdb092656a822287a6691aa7ce668c8160^{commit}
5694cecdb092656a822287a6691aa7ce668c8160
already have revision, skipping fetch
# git checkout -q -f -B kisskb 5694cecdb092656a822287a6691aa7ce668c8160
# git clean -qxdf
# < git log -1
# commit 5694cecdb092656a822287a6691aa7ce668c8160
# Merge: 13e1ad2be3a8 12f799c8c739
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Tue Dec 25 17:41:56 2018 -0800
# 
#     Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
#     
#     Pull arm64 festive updates from Will Deacon:
#      "In the end, we ended up with quite a lot more than I expected:
#     
#        - Support for ARMv8.3 Pointer Authentication in userspace (CRIU and
#          kernel-side support to come later)
#     
#        - Support for per-thread stack canaries, pending an update to GCC
#          that is currently undergoing review
#     
#        - Support for kexec_file_load(), which permits secure boot of a kexec
#          payload but also happens to improve the performance of kexec
#          dramatically because we can avoid the sucky purgatory code from
#          userspace. Kdump will come later (requires updates to libfdt).
#     
#        - Optimisation of our dynamic CPU feature framework, so that all
#          detected features are enabled via a single stop_machine()
#          invocation
#     
#        - KPTI whitelisting of Cortex-A CPUs unaffected by Meltdown, so that
#          they can benefit from global TLB entries when KASLR is not in use
#     
#        - 52-bit virtual addressing for userspace (kernel remains 48-bit)
#     
#        - Patch in LSE atomics for per-cpu atomic operations
#     
#        - Custom preempt.h implementation to avoid unconditional calls to
#          preempt_schedule() from preempt_enable()
#     
#        - Support for the new 'SB' Speculation Barrier instruction
#     
#        - Vectorised implementation of XOR checksumming and CRC32
#          optimisations
#     
#        - Workaround for Cortex-A76 erratum #1165522
#     
#        - Improved compatibility with Clang/LLD
#     
#        - Support for TX2 system PMUS for profiling the L3 cache and DMC
#     
#        - Reflect read-only permissions in the linear map by default
#     
#        - Ensure MMIO reads are ordered with subsequent calls to Xdelay()
#     
#        - Initial support for memory hotplug
#     
#        - Tweak the threshold when we invalidate the TLB by-ASID, so that
#          mremap() performance is improved for ranges spanning multiple PMDs.
#     
#        - Minor refactoring and cleanups"
#     
#     * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (125 commits)
#       arm64: kaslr: print PHYS_OFFSET in dump_kernel_offset()
#       arm64: sysreg: Use _BITUL() when defining register bits
#       arm64: cpufeature: Rework ptr auth hwcaps using multi_entry_cap_matches
#       arm64: cpufeature: Reduce number of pointer auth CPU caps from 6 to 4
#       arm64: docs: document pointer authentication
#       arm64: ptr auth: Move per-thread keys from thread_info to thread_struct
#       arm64: enable pointer authentication
#       arm64: add prctl control for resetting ptrauth keys
#       arm64: perf: strip PAC when unwinding userspace
#       arm64: expose user PAC bit positions via ptrace
#       arm64: add basic pointer authentication support
#       arm64/cpufeature: detect pointer authentication
#       arm64: Don't trap host pointer auth use to EL2
#       arm64/kvm: hide ptrauth from guests
#       arm64/kvm: consistently handle host HCR_EL2 flags
#       arm64: add pointer authentication register bits
#       arm64: add comments about EC exception levels
#       arm64: perf: Treat EXCLUDE_EL* bit definitions as unsigned
#       arm64: kpti: Whitelist Cortex-A CPUs that don't implement the CSV3 field
#       arm64: enable per-task stack canaries
#       ...
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 5694cecdb092656a822287a6691aa7ce668c8160
# < make -s -j 8 ARCH=powerpc O=/kisskb/build/linus_pseries_le_defconfig_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  pseries_le_defconfig
# make -s -j 8 ARCH=powerpc O=/kisskb/build/linus_pseries_le_defconfig_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-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_ppc64le-gcc5
# Build took: 0:03:39.399134