# git rev-parse -q --verify e07c9d18da02a4312609819bbc4e59c37108b8e6^{commit}
e07c9d18da02a4312609819bbc4e59c37108b8e6
already have revision, skipping fetch
# git checkout -q -f -B kisskb e07c9d18da02a4312609819bbc4e59c37108b8e6
# git clean -qxdf
# < git log -1
# commit e07c9d18da02a4312609819bbc4e59c37108b8e6
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Wed Oct 25 12:24:52 2023 +1100
# 
#     powerpc: Make cpu_spec __ro_after_init
#     
#     The cpu_spec is a struct holding various information about the CPU the
#     kernel is executing on. It's populated early in boot and must not change
#     after that.
#     
#     In particular the cpu_features and mmu_features hold the set of
#     discovered CPU/MMU features and are used to set static keys for each
#     feature, and do binary patching of assembly. So any change to the
#     cpu_features/mmu_features later in boot will not be reflected in
#     the state of the static keys or patched code.
#     
#     There is already logic to check that cpu_features/mmu_features don't
#     change, see check_features() in feature-fixups.c.
#     
#     But as another layer of protection the entire cpu_spec should be read
#     only after init, annotate it as such.
#     
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://msgid.link/20231025012452.1985680-1-mpe@ellerman.id.au
# < /opt/cross/kisskb/korg/gcc-12.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-12.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 e07c9d18da02a4312609819bbc4e59c37108b8e6
# make -s -j 40 ARCH=powerpc O=/kisskb/build/powerpc-next_allnoconfig_powerpc-gcc12 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  allnoconfig
# < make -s -j 40 ARCH=powerpc O=/kisskb/build/powerpc-next_allnoconfig_powerpc-gcc12 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 40 ARCH=powerpc O=/kisskb/build/powerpc-next_allnoconfig_powerpc-gcc12 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 40 ARCH=powerpc O=/kisskb/build/powerpc-next_allnoconfig_powerpc-gcc12 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-12.2.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
Completed OK
# rm -rf /kisskb/build/powerpc-next_allnoconfig_powerpc-gcc12
# Build took: 0:00:27.287877