# git rev-parse -q --verify 86be334f0b8127a5ca13443ba2f14858cd077ba3^{commit}
86be334f0b8127a5ca13443ba2f14858cd077ba3
already have revision, skipping fetch
# git checkout -q -f -B kisskb 86be334f0b8127a5ca13443ba2f14858cd077ba3
# git clean -qxdf
# < git log -1
# commit 86be334f0b8127a5ca13443ba2f14858cd077ba3
# Author: Christophe Leroy <christophe.leroy@c-s.fr>
# Date:   Sun Feb 9 18:14:42 2020 +0000
# 
#     powerpc/8xx: Fix clearing of bits 20-23 in ITLB miss
#     
#     In ITLB miss handled the line supposed to clear bits 20-23 on the L2
#     ITLB entry is buggy and does indeed nothing, leading to undefined
#     value which could allow execution when it shouldn't.
#     
#     Properly do the clearing with the relevant instruction.
#     
#     Fixes: 74fabcadfd43 ("powerpc/8xx: don't use r12/SPRN_SPRG_SCRATCH2 in TLB Miss handlers")
#     Cc: stable@vger.kernel.org # v5.0+
#     Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/4f70c2778163affce8508a210f65d140e84524b4.1581272050.git.christophe.leroy@c-s.fr
# < /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 86be334f0b8127a5ca13443ba2f14858cd077ba3
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_ep405_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  40x/ep405_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_40x_ep405_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/arch/powerpc/kernel/head_40x.S: Assembler messages:
/kisskb/src/arch/powerpc/kernel/head_40x.S:804: Warning: invalid register expression
INFO: Uncompressed kernel (size 0x542864) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x600000)
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_40x_ep405_defconfig_powerpc-gcc5
# Build took: 0:00:38.649041