linux-kernel - [GIT PULL] Clang feature updates for v5.14-rc1 (take 2)

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Date:   Tue, 29 Jun 2021 13:55:20 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org,
        Catalin Marinas <catalin.marinas@....com>,
        Fangrui Song <maskray@...gle.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Kees Cook <keescook@...omium.org>,
        Mark Rutland <mark.rutland@....com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Miguel Ojeda <ojeda@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Peter Oberparleiter <oberpar@...ux.ibm.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Philippe Mathieu-Daudé <philmd@...hat.com>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Sedat Dilek <sedat.dilek@...il.com>,
        Will Deacon <will@...nel.org>
Subject: [GIT PULL] Clang feature updates for v5.14-rc1 (take 2)

Hi Linus,

Please pull these Clang feature updates for v5.14-rc1 (take 2). This is
everything except the big PGO portion from the original pull request
and includes an additional CFI fix that had gotten lost.

Thanks!

-Kees

The following changes since commit d07f6ca923ea0927a1024dfccafc5b53b61cfecc:

  Linux 5.13-rc2 (2021-05-16 15:27:44 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git tags/clang-features-v5.14-rc1

for you to fetch changes up to fca41af18e10318e4de090db47d9fa7169e1bf2f:

  qemu_fw_cfg: Make fw_cfg_rev_attr a proper kobj_attribute (2021-06-29 13:25:20 -0700)

----------------------------------------------------------------
Clang feature updates for v5.14-rc1

- Add CC_HAS_NO_PROFILE_FN_ATTR in preparation for PGO support in
  the face of the noinstr attribute, paving the way for PGO and fixing
  GCOV. (Nick Desaulniers)

- x86_64 LTO coverage is expanded to 32-bit x86. (Nathan Chancellor)

- Small fixes to CFI. (Mark Rutland, Nathan Chancellor)

----------------------------------------------------------------
Mark Rutland (1):
      CFI: Move function_nocfi() into compiler.h

Nathan Chancellor (3):
      MAINTAINERS: Add Clang CFI section
      x86, lto: Enable Clang LTO for 32-bit as well
      qemu_fw_cfg: Make fw_cfg_rev_attr a proper kobj_attribute

Nick Desaulniers (3):
      compiler_attributes.h: define __no_profile, add to noinstr
      compiler_attributes.h: cleanups for GCC 4.9+
      Kconfig: Introduce ARCH_WANTS_NO_INSTR and CC_HAS_NO_PROFILE_FN_ATTR

 MAINTAINERS                         | 12 ++++++++++++
 arch/Kconfig                        |  7 +++++++
 arch/arm64/Kconfig                  |  1 +
 arch/arm64/include/asm/compiler.h   | 16 ++++++++++++++++
 arch/arm64/include/asm/memory.h     | 16 ----------------
 arch/s390/Kconfig                   |  1 +
 arch/x86/Kconfig                    |  5 +++--
 drivers/firmware/qemu_fw_cfg.c      |  8 +++-----
 include/linux/compiler.h            | 10 ++++++++++
 include/linux/compiler_attributes.h | 19 ++++++++++++++++---
 include/linux/compiler_types.h      |  2 +-
 include/linux/mm.h                  | 10 ----------
 init/Kconfig                        |  3 +++
 kernel/gcov/Kconfig                 |  1 +
 14 files changed, 74 insertions(+), 37 deletions(-)

-- 
Kees Cook