# git rev-parse -q --verify f01ad0b9f2dcfd006e1fa77104fdf989980ff20f^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/linuxppc/linux.git fixes-test
warning: The last gc run reported the following. Please correct the root cause
and remove .git/gc.log.
Automatic cleanup will not be performed until the file is removed.

warning: There are too many unreachable loose objects; run 'git prune' to remove them.

# git rev-parse -q --verify f01ad0b9f2dcfd006e1fa77104fdf989980ff20f^{commit}
f01ad0b9f2dcfd006e1fa77104fdf989980ff20f
# git checkout -q -f -B kisskb f01ad0b9f2dcfd006e1fa77104fdf989980ff20f
# git clean -qxdf
# < git log -1
# commit f01ad0b9f2dcfd006e1fa77104fdf989980ff20f
# Author: Christophe Leroy <christophe.leroy@csgroup.eu>
# Date:   Thu Nov 18 10:39:53 2021 +0100
# 
#     powerpc/32: Fix hardlockup on vmap stack overflow
#     
#     Since the commit c118c7303ad5 ("powerpc/32: Fix vmap stack - Do not
#     activate MMU before reading task struct") a vmap stack overflow
#     results in a hard lockup. This is because emergency_ctx is still
#     addressed with its virtual address allthough data MMU is not active
#     anymore at that time.
#     
#     Fix it by using a physical address instead.
#     
#     Fixes: c118c7303ad5 ("powerpc/32: Fix vmap stack - Do not activate MMU before reading task struct")
#     Cc: stable@vger.kernel.org # v5.10+
#     Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/ce30364fb7ccda489272af4a1612b6aa147e1d23.1637227521.git.christophe.leroy@csgroup.eu
# < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-gcc --version
# < /opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-ld --version
# < git log --format=%s --max-count=1 f01ad0b9f2dcfd006e1fa77104fdf989980ff20f
# < make -s -j 8 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  defconfig
# < make -s -j 8 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  help
# make -s -j 8 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  olddefconfig
# make -s -j 8 ARCH=mips O=/kisskb/build/powerpc-fixes_mips-defconfig_mipsel CROSS_COMPILE=/opt/cross/kisskb/br-mipsel-o32-full-2016.08-613-ge98b4dd/bin/mipsel-linux-  
/kisskb/src/arch/mips/boot/dts/img/boston.dts:128.19-178.5: Warning (pci_device_reg): /pci@14000000/pci2_root@0,0,0: PCI unit address format error, expected "0,0"
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_mips-defconfig_mipsel
# Build took: 0:02:49.719855