# git rev-parse -q --verify 478cb53ce5e2d5fd96c2da42d0f9d2b53620881a^{commit}
478cb53ce5e2d5fd96c2da42d0f9d2b53620881a
already have revision, skipping fetch
# git checkout -q -f -B kisskb 478cb53ce5e2d5fd96c2da42d0f9d2b53620881a
# git clean -qxdf
# < git log -1
# commit 478cb53ce5e2d5fd96c2da42d0f9d2b53620881a
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Wed Nov 10 12:50:56 2021 +1000
# 
#     powerpc/watchdog: read TB close to where it is used
#     
#     When taking watchdog actions, printing messages, comparing and
#     re-setting wd_smp_last_reset_tb, etc., read TB close to the point of use
#     and under wd_smp_lock or printing lock (if applicable).
#     
#     This should keep timebase mostly monotonic with kernel log messages, and
#     could prevent (in theory) a laggy CPU updating wd_smp_last_reset_tb to
#     something a long way in the past, and causing other CPUs to appear to be
#     stuck.
#     
#     These additional TB reads are all slowpath (lockup has been detected),
#     so performance does not matter.
#     
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20211110025056.2084347-5-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 478cb53ce5e2d5fd96c2da42d0f9d2b53620881a
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_52xx_motionpro_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  52xx/motionpro_defconfig
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_52xx_motionpro_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-next_52xx_motionpro_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-next_52xx_motionpro_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
<stdin>:1559:2: warning: #warning syscall futex_waitv not implemented [-Wcpp]
Completed OK
# rm -rf /kisskb/build/powerpc-next_52xx_motionpro_defconfig_powerpc-gcc5
# Build took: 0:01:02.063007