# 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-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 5256426247837feb8703625bda7fcfc824af04cf
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc885_ads_defconfig+HUGETLB_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  mpc885_ads_defconfig
# Added to kconfig CONFIG_HUGETLBFS=y
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_mpc885_ads_defconfig+HUGETLB_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_mpc885_ads_defconfig+HUGETLB_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_mpc885_ads_defconfig+HUGETLB_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
INFO: Uncompressed kernel (size 0x41a484) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x500000)
Image Name:   Linux-5.12.0-rc3-g525642624783
Created:      Fri Apr 30 01:40:25 2021
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2068133 Bytes = 2019.66 KiB = 1.97 MiB
Load Address: 00500000
Entry Point:  00500204
Completed OK
# rm -rf /kisskb/build/powerpc-next_mpc885_ads_defconfig+HUGETLB_powerpc-gcc5
# Build took: 0:00:46.680120