# git rev-parse -q --verify e5abb2825c66bacb76417c9a28941cdf7fd22f32^{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 e5abb2825c66bacb76417c9a28941cdf7fd22f32^{commit}
e5abb2825c66bacb76417c9a28941cdf7fd22f32
# git checkout -q -f -B kisskb e5abb2825c66bacb76417c9a28941cdf7fd22f32
# git clean -qxdf
# < git log -1
# commit e5abb2825c66bacb76417c9a28941cdf7fd22f32
# 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-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-gcc --version
# < /opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-ld --version
# < git log --format=%s --max-count=1 e5abb2825c66bacb76417c9a28941cdf7fd22f32
# < make -s -j 32 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  defconfig
# < make -s -j 32 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  help
# make -s -j 32 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  olddefconfig
# make -s -j 32 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_sparc64-defconfig_sparc64 CROSS_COMPILE=/opt/cross/kisskb/br-sparc64-full-2016.08-613-ge98b4dd/bin/sparc64-linux-  
<stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp]
<stdin>:1559:2: warning: #warning syscall futex_waitv not implemented [-Wcpp]
WARNING: modpost: EXPORT symbol "_mcount" [vmlinux] version ...
Is "_mcount" prototyped in <asm/asm-prototypes.h>?
  kernel: arch/sparc/boot/image is ready
  kernel: arch/sparc/boot/zImage is ready
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_sparc64-defconfig_sparc64
# Build took: 0:01:43.712311