linux-kernel - [PATCH v5 0/2] ARM: kprobes: asm warning fixes and UAL conversion

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Date:   Wed, 10 Feb 2021 18:51:47 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Russell King <linux@...linux.org.uk>,
        Arnd Bergmann <arnd@...nel.org>,
        Ard Biesheuvel <ardb@...nel.org>
Cc:     clang-built-linux@...glegroups.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        Peter Smith <peter.smith@....com>,
        Renato Golin <rengolin@...temcall.eu>,
        David Spickett <david.spickett@...aro.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: [PATCH v5 0/2] ARM: kprobes: asm warning fixes and UAL conversion

Clang's integrated assembler only supports UAL and rejects instructions
that are UNPREDICTABLE; KernelCI has been warning about those for awhile
now when using GAS (GCC or Clang) for allmodconfig builds.

Changes V4 -> V5:
* Make patch into series.
* Fix the UNPREDICTABLE warnings first.
* Add .syntax unified to fix the GCC build failure reported by 0day bot.
Changes V3 -> V4:
* use __inst_arm for movs based on resolution of
  https://reviews.llvm.org/D95586.
Changes V2 -> V3:
* drop changes to test-thumb.c. That file is mutually exclusive with
  test-arm.c based on CONFIG_THUMB2_KERNEL. LLVM requires more fixes for
  .w suffixes for thumb2 mode.
Changes V1 -> V2:
* Fix additonal swpvsb case in test-arm.c when __LINUX_ARM_ARCH__ < 6,
  reported by Arnd.
* Fix arch/arm/probes/kprobes/test-thumb.c, reported by Arnd.
* Modify the oneline to note I'm modifying test-*.c.

Nick Desaulniers (2):
  ARM: kprobes: fix UNPREDICTABLE warnings
  ARM: kprobes: rewrite test-arm.c in UAL

 arch/arm/probes/kprobes/test-arm.c  | 294 ++++++++++++++--------------
 arch/arm/probes/kprobes/test-core.h |   1 +
 2 files changed, 148 insertions(+), 147 deletions(-)

-- 
2.30.0.478.g8a0d178c01-goog