# git rev-parse -q --verify 57fa2369ab17d67e6232f85b868652fbf4407206^{commit}
57fa2369ab17d67e6232f85b868652fbf4407206
already have revision, skipping fetch
# git checkout -q -f -B kisskb 57fa2369ab17d67e6232f85b868652fbf4407206
# git clean -qxdf
# < git log -1
# commit 57fa2369ab17d67e6232f85b868652fbf4407206
# Merge: 2fbc66c7838a 9186ad8e66ba
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Tue Apr 27 10:16:46 2021 -0700
# 
#     Merge tag 'cfi-v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
#     
#     Pull CFI on arm64 support from Kees Cook:
#      "This builds on last cycle's LTO work, and allows the arm64 kernels to
#       be built with Clang's Control Flow Integrity feature. This feature has
#       happily lived in Android kernels for almost 3 years[1], so I'm excited
#       to have it ready for upstream.
#     
#       The wide diffstat is mainly due to the treewide fixing of mismatched
#       list_sort prototypes. Other things in core kernel are to address
#       various CFI corner cases. The largest code portion is the CFI runtime
#       implementation itself (which will be shared by all architectures
#       implementing support for CFI). The arm64 pieces are Acked by arm64
#       maintainers rather than coming through the arm64 tree since carrying
#       this tree over there was going to be awkward.
#     
#       CFI support for x86 is still under development, but is pretty close.
#       There are a handful of corner cases on x86 that need some improvements
#       to Clang and objtool, but otherwise works well.
#     
#       Summary:
#     
#        - Clean up list_sort prototypes (Sami Tolvanen)
#     
#        - Introduce CONFIG_CFI_CLANG for arm64 (Sami Tolvanen)"
#     
#     * tag 'cfi-v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
#       arm64: allow CONFIG_CFI_CLANG to be selected
#       KVM: arm64: Disable CFI for nVHE
#       arm64: ftrace: use function_nocfi for ftrace_call
#       arm64: add __nocfi to __apply_alternatives
#       arm64: add __nocfi to functions that jump to a physical address
#       arm64: use function_nocfi with __pa_symbol
#       arm64: implement function_nocfi
#       psci: use function_nocfi for cpu_resume
#       lkdtm: use function_nocfi
#       treewide: Change list_sort to use const pointers
#       bpf: disable CFI in dispatcher functions
#       kallsyms: strip ThinLTO hashes from static functions
#       kthread: use WARN_ON_FUNCTION_MISMATCH
#       workqueue: use WARN_ON_FUNCTION_MISMATCH
#       module: ensure __cfi_check alignment
#       mm: add generic function_nocfi macro
#       cfi: add __cficanonical
#       add support for Clang CFI
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 57fa2369ab17d67e6232f85b868652fbf4407206
# < make -s -j 48 ARCH=x86_64 O=/kisskb/build/linus_x86_64-allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  allnoconfig
# < make -s -j 48 ARCH=x86_64 O=/kisskb/build/linus_x86_64-allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  help
# make -s -j 48 ARCH=x86_64 O=/kisskb/build/linus_x86_64-allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  olddefconfig
# make -s -j 48 ARCH=x86_64 O=/kisskb/build/linus_x86_64-allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
/kisskb/src/kernel/static_call.c: In function '__static_call_update':
/kisskb/src/kernel/static_call.c:153:18: warning: unused variable 'mod' [-Wunused-variable]
   struct module *mod = site_mod->mod;
                  ^~~
Completed OK
# rm -rf /kisskb/build/linus_x86_64-allnoconfig_x86_64-gcc8
# Build took: 0:00:22.632369