# git rev-parse -q --verify dc398a084d459f065658855454e09f2778f8c5cc^{commit}
dc398a084d459f065658855454e09f2778f8c5cc
already have revision, skipping fetch
# git checkout -q -f -B kisskb dc398a084d459f065658855454e09f2778f8c5cc
# git clean -qxdf
# < git log -1
# commit dc398a084d459f065658855454e09f2778f8c5cc
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Fri Oct 7 00:04:11 2022 +1000
# 
#     powerpc/64s/interrupt: Perf NMI should not take normal exit path
#     
#     NMI interrupts should exit with EXCEPTION_RESTORE_REGS not with
#     interrupt_return_srr, which is what the perf NMI handler currently does.
#     This breaks if a PMI hits after interrupt_exit_user_prepare_main() has
#     switched the context tracking to user mode, then the CT_WARN_ON() in
#     interrupt_exit_kernel_prepare() fires because it returns to kernel with
#     context set to user.
#     
#     This could possibly be solved by soft-disabling PMIs in the exit path,
#     but that reduces our ability to profile that code. The warning could be
#     removed, but it's potentially useful.
#     
#     All other NMIs and soft-NMIs return using EXCEPTION_RESTORE_REGS, so
#     this makes perf interrupts consistent with that and seems like the best
#     fix.
#     
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     [mpe: Squash in fixups from Nick]
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20221006140413.126443-3-npiggin@gmail.com
# < /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 dc398a084d459f065658855454e09f2778f8c5cc
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  40x/kilauea_defconfig
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_40x_kilauea_defconfig_powerpc-gcc5
# Build took: 0:01:03.648888