# git rev-parse -q --verify 5256426247837feb8703625bda7fcfc824af04cf^{commit}
5256426247837feb8703625bda7fcfc824af04cf
already have revision, skipping fetch
# git checkout -q -f -B kisskb 5256426247837feb8703625bda7fcfc824af04cf
# git clean -qxdf
# < git log -1
# commit 5256426247837feb8703625bda7fcfc824af04cf
# Author: Christophe Leroy <christophe.leroy@csgroup.eu>
# Date:   Fri Apr 23 13:52:10 2021 +0000
# 
#     powerpc/signal32: Fix erroneous SIGSEGV on RT signal return
#     
#     Return of user_read_access_begin() is tested the wrong way,
#     leading to a SIGSEGV when the user address is valid and likely
#     an Oops when the user address is bad.
#     
#     Fix the test.
#     
#     Fixes: 887f3ceb51cd ("powerpc/signal32: Convert do_setcontext[_tm]() to user access block")
#     Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/a29aadc54c93bcbf069a83615fa102ca0f59c3ae.1619185912.git.christophe.leroy@csgroup.eu
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-ld --version
# < git log --format=%s --max-count=1 5256426247837feb8703625bda7fcfc824af04cf
# < make -s -j 48 ARCH=arm O=/kisskb/build/powerpc-next_versatile_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  versatile_defconfig
# < make -s -j 48 ARCH=arm O=/kisskb/build/powerpc-next_versatile_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  help
# make -s -j 48 ARCH=arm O=/kisskb/build/powerpc-next_versatile_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  olddefconfig
# make -s -j 48 ARCH=arm O=/kisskb/build/powerpc-next_versatile_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  
Completed OK
# rm -rf /kisskb/build/powerpc-next_versatile_defconfig_arm-gcc4.9
# Build took: 0:00:49.552375