[PATCH 0/2] arm64: atomics: improvements

From: Mark Rutland <mark.rutland@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, mark.rutland@arm.com, will@kernel.org
Subject: [PATCH 0/2] arm64: atomics: improvements
Date: Wed, 17 Aug 2022 16:59:12 +0100	[thread overview]
Message-ID: <20220817155914.3975112-1-mark.rutland@arm.com> (raw)

These two patches improve arm64's atomics:

* The first patch ensures that the LL/SC atomics can be correctly
  unwound when backtracing, avoiding issues similar to those seen with
  out-of-line uaccess fixups.

* The second patch ensures the LSE and LL/SC atomic implementations are
  never unintentially instrumented. This is necessary such that they can
  be safely used within noinstr code.

Aside from the improved robustness and ease of debug, there should be no
functional change as a result of this patch.

Thanks,
Mark.

Mark Rutland (2):
  arm64: atomics: remove LL/SC trampolines
  arm64: atomic: always inline the assembly

 arch/arm64/include/asm/atomic_ll_sc.h | 58 +++++++++------------------
 arch/arm64/include/asm/atomic_lse.h   | 46 +++++++++++++--------
 2 files changed, 47 insertions(+), 57 deletions(-)

-- 
2.30.2

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