linux-kernel - [PATCH v3 0/2] riscv: fix patching with IPI

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Message-Id: <20240229121056.203419-1-alexghiti@rivosinc.com>
Date: Thu, 29 Feb 2024 13:10:54 +0100
From: Alexandre Ghiti <alexghiti@...osinc.com>
To: Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Andrea Parri <andrea@...osinc.com>,
	Samuel Holland <samuel.holland@...ive.com>,
	Anup Patel <anup@...infault.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org
Cc: Alexandre Ghiti <alexghiti@...osinc.com>
Subject: [PATCH v3 0/2] riscv: fix patching with IPI

patch 1 removes a useless memory barrier and patch 2 actually fixes the
issue with IPI in the patching code.

Changes in v3:
- Remove wrong cleanup as noted by Samuel
- Enhance comment about usage of release semantics as suggested by
  Andrea
- Add RBs from Andrea

Changes in v2:
- Add patch 1 and then remove the memory barrier from patch 2 as
  suggested by Andrea
- Convert atomic_inc into an atomic_inc with release semantics as
  suggested by Andrea

Alexandre Ghiti (2):
  riscv: Remove superfluous smp_mb()
  riscv: Fix text patching when IPI are used

 arch/riscv/include/asm/patch.h |  1 +
 arch/riscv/kernel/ftrace.c     | 44 ++++++++++++++++++++++++++++++----
 arch/riscv/kernel/patch.c      | 17 +++++++++----
 3 files changed, 53 insertions(+), 9 deletions(-)

-- 
2.39.2