# git rev-parse -q --verify 7bc08056a6dabc3a1442216daf527edf61ac24b6^{commit}
7bc08056a6dabc3a1442216daf527edf61ac24b6
already have revision, skipping fetch
# git checkout -q -f -B kisskb 7bc08056a6dabc3a1442216daf527edf61ac24b6
# git clean -qxdf
# < git log -1
# commit 7bc08056a6dabc3a1442216daf527edf61ac24b6
# Author: Andrew Donnellan <ajd@linux.ibm.com>
# Date:   Tue Jun 14 23:49:52 2022 +1000
# 
#     powerpc/rtas: Allow ibm,platform-dump RTAS call with null buffer address
#     
#     Add a special case to block_rtas_call() to allow the ibm,platform-dump RTAS
#     call through the RTAS filter if the buffer address is 0.
#     
#     According to PAPR, ibm,platform-dump is called with a null buffer address
#     to notify the platform firmware that processing of a particular dump is
#     finished.
#     
#     Without this, on a pseries machine with CONFIG_PPC_RTAS_FILTER enabled, an
#     application such as rtas_errd that is attempting to retrieve a dump will
#     encounter an error at the end of the retrieval process.
#     
#     Fixes: bd59380c5ba4 ("powerpc/rtas: Restrict RTAS requests from userspace")
#     Cc: stable@vger.kernel.org
#     Reported-by: Sathvika Vasireddy <sathvika@linux.ibm.com>
#     Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
#     Reviewed-by: Tyrel Datwyler <tyreld@linux.ibm.com>
#     Reviewed-by: Nathan Lynch <nathanl@linux.ibm.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20220614134952.156010-1-ajd@linux.ibm.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 7bc08056a6dabc3a1442216daf527edf61ac24b6
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_44x_sam440ep_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  44x/sam440ep_defconfig
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_44x_sam440ep_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_44x_sam440ep_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-fixes_44x_sam440ep_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_44x_sam440ep_defconfig_powerpc-gcc5
# Build took: 0:00:25.222635