# git rev-parse -q --verify 7001052160d172f6de06adeffde24dde9935ece8^{commit}
7001052160d172f6de06adeffde24dde9935ece8
already have revision, skipping fetch
# git checkout -q -f -B kisskb 7001052160d172f6de06adeffde24dde9935ece8
# git clean -qxdf
# < git log -1
# commit 7001052160d172f6de06adeffde24dde9935ece8
# Merge: f022814633e1 3986f65d4f40
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Mar 27 10:17:23 2022 -0700
# 
#     Merge tag 'x86_core_for_5.18_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
#     
#     Pull x86 CET-IBT (Control-Flow-Integrity) support from Peter Zijlstra:
#      "Add support for Intel CET-IBT, available since Tigerlake (11th gen),
#       which is a coarse grained, hardware based, forward edge
#       Control-Flow-Integrity mechanism where any indirect CALL/JMP must
#       target an ENDBR instruction or suffer #CP.
#     
#       Additionally, since Alderlake (12th gen)/Sapphire-Rapids, speculation
#       is limited to 2 instructions (and typically fewer) on branch targets
#       not starting with ENDBR. CET-IBT also limits speculation of the next
#       sequential instruction after the indirect CALL/JMP [1].
#     
#       CET-IBT is fundamentally incompatible with retpolines, but provides,
#       as described above, speculation limits itself"
#     
#     [1] https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/technical-documentation/branch-history-injection.html
#     
#     * tag 'x86_core_for_5.18_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (53 commits)
#       kvm/emulate: Fix SETcc emulation for ENDBR
#       x86/Kconfig: Only allow CONFIG_X86_KERNEL_IBT with ld.lld >= 14.0.0
#       x86/Kconfig: Only enable CONFIG_CC_HAS_IBT for clang >= 14.0.0
#       kbuild: Fixup the IBT kbuild changes
#       x86/Kconfig: Do not allow CONFIG_X86_X32_ABI=y with llvm-objcopy
#       x86: Remove toolchain check for X32 ABI capability
#       x86/alternative: Use .ibt_endbr_seal to seal indirect calls
#       objtool: Find unused ENDBR instructions
#       objtool: Validate IBT assumptions
#       objtool: Add IBT/ENDBR decoding
#       objtool: Read the NOENDBR annotation
#       x86: Annotate idtentry_df()
#       x86,objtool: Move the ASM_REACHABLE annotation to objtool.h
#       x86: Annotate call_on_stack()
#       objtool: Rework ASM_REACHABLE
#       x86: Mark __invalid_creds() __noreturn
#       exit: Mark do_group_exit() __noreturn
#       x86: Mark stop_this_cpu() __noreturn
#       objtool: Ignore extra-symbol code
#       objtool: Rename --duplicate to --lto
#       ...
# < /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 7001052160d172f6de06adeffde24dde9935ece8
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/linus_ppc40x_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  ppc40x_defconfig
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/linus_ppc40x_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/linus_ppc40x_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/linus_ppc40x_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
In file included from /kisskb/src/arch/powerpc/kernel/irq.c:66:0:
/kisskb/src/arch/powerpc/include/asm/livepatch.h:7:0: error: unterminated #ifndef
 #ifndef _ASM_POWERPC_LIVEPATCH_H
 ^
make[3]: *** [/kisskb/src/scripts/Makefile.build:289: arch/powerpc/kernel/irq.o] Error 1
make[3]: *** Waiting for unfinished jobs....
In file included from /kisskb/src/arch/powerpc/kernel/process.c:62:0:
/kisskb/src/arch/powerpc/include/asm/livepatch.h:7:0: error: unterminated #ifndef
 #ifndef _ASM_POWERPC_LIVEPATCH_H
 ^
/kisskb/src/arch/powerpc/kernel/process.c: In function 'copy_thread':
/kisskb/src/arch/powerpc/kernel/process.c:1734:2: error: implicit declaration of function 'klp_init_thread_info' [-Werror=implicit-function-declaration]
  klp_init_thread_info(p);
  ^
cc1: all warnings being treated as errors
make[3]: *** [/kisskb/src/scripts/Makefile.build:289: arch/powerpc/kernel/process.o] Error 1
In file included from /kisskb/src/arch/powerpc/kernel/setup-common.c:63:0:
/kisskb/src/arch/powerpc/include/asm/livepatch.h:7:0: error: unterminated #ifndef
 #ifndef _ASM_POWERPC_LIVEPATCH_H
 ^
/kisskb/src/arch/powerpc/kernel/setup-common.c: In function 'setup_arch':
/kisskb/src/arch/powerpc/kernel/setup-common.c:911:2: error: implicit declaration of function 'klp_init_thread_info' [-Werror=implicit-function-declaration]
  klp_init_thread_info(&init_task);
  ^
cc1: all warnings being treated as errors
make[3]: *** [/kisskb/src/scripts/Makefile.build:289: arch/powerpc/kernel/setup-common.o] Error 1
make[2]: *** [/kisskb/src/scripts/Makefile.build:551: arch/powerpc/kernel] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1830: arch/powerpc] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 120 ARCH=powerpc O=/kisskb/build/linus_ppc40x_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_ppc40x_defconfig_powerpc-gcc5
# Build took: 0:00:17.804843