# git rev-parse -q --verify dfaed3e1fa7099de8de4e89cbe7eb9c1bca27dfe^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/mpe/kisskb quick
# git rev-parse -q --verify dfaed3e1fa7099de8de4e89cbe7eb9c1bca27dfe^{commit}
dfaed3e1fa7099de8de4e89cbe7eb9c1bca27dfe
# git checkout -q -f -B kisskb dfaed3e1fa7099de8de4e89cbe7eb9c1bca27dfe
# git clean -qxdf
# < git log -1
# commit dfaed3e1fa7099de8de4e89cbe7eb9c1bca27dfe
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Wed Jun 7 10:56:00 2023 +1000
# 
#     powerpc/64s/radix: Fix exit lazy tlb mm switch with irqs enabled
#     
#     Switching mm and tinkering with current->active_mm should be done with
#     irqs disabled. There is a path where exit_lazy_flush_tlb can be called
#     with irqs enabled:
#     
#         exit_lazy_flush_tlb
#         flush_type_needed
#         __flush_all_mm
#         tlb_finish_mmu
#         exit_mmap
#     
#     Which results in the switching being done with irqs enabled, which is
#     incorrect.
#     
#     Fixes: a665eec0a22e ("powerpc/64s/radix: Fix mm_cpumask trimming race vs kthread_use_mm")
#     Cc: stable@vger.kernel.org # v5.10+
#     Reported-by: Sachin Sant <sachinp@linux.ibm.com>
#     Link: https://lore.kernel.org/linuxppc-dev/A9A5D83D-BA70-47A4-BCB4-30C1AE19BC22@linux.ibm.com/
#     Tested-by: Sachin Sant <sachinp@linux.ibm.com>
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://msgid.link/20230607005601.583293-1-npiggin@gmail.com
# < /opt/cross/kisskb/korg/gcc-8.5.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.5.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 dfaed3e1fa7099de8de4e89cbe7eb9c1bca27dfe
# make -s -j 32 ARCH=x86_64 O=/kisskb/build/mpe-quick_allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/x86_64-linux/bin/x86_64-linux-  allnoconfig
# < make -s -j 32 ARCH=x86_64 O=/kisskb/build/mpe-quick_allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/x86_64-linux/bin/x86_64-linux-  help
# make -s -j 32 ARCH=x86_64 O=/kisskb/build/mpe-quick_allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/x86_64-linux/bin/x86_64-linux-  olddefconfig
# make -s -j 32 ARCH=x86_64 O=/kisskb/build/mpe-quick_allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/x86_64-linux/bin/x86_64-linux-  
Completed OK
# rm -rf /kisskb/build/mpe-quick_allnoconfig_x86_64-gcc8
# Build took: 0:08:23.558464