Received-SPF: pass (google.com: domain of linux-kernel+bounces-121604-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3;
From: Samuel Holland <samuel.holland@sifive.com>
To: Palmer Dabbelt <palmer@dabbelt.com>
Cc: =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= <bjorn@rivosinc.com>,
	linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Samuel Holland <samuel.holland@sifive.com>
Subject: [PATCH v2 3/7] riscv: kprobes: Use patch_text_nosync() for insn slots
Date: Wed, 27 Mar 2024 09:04:42 -0700
Message-ID: <20240327160520.791322-4-samuel.holland@sifive.com>
In-Reply-To: <20240327160520.791322-1-samuel.holland@sifive.com>
References: <20240327160520.791322-1-samuel.holland@sifive.com>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

These instructions are not yet visible to the rest of the system,
so there is no need to do the whole stop_machine() dance.

Reviewed-by: Björn Töpel <bjorn@rivosinc.com>
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
---

Changes in v2:
 - Remove unnecessary line wrapping

 arch/riscv/kernel/probes/kprobes.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/riscv/kernel/probes/kprobes.c b/arch/riscv/kernel/probes/kprobes.c
index 2f08c14a933d..fecbbcf40ac3 100644
--- a/arch/riscv/kernel/probes/kprobes.c
+++ b/arch/riscv/kernel/probes/kprobes.c
@@ -28,9 +28,8 @@ static void __kprobes arch_prepare_ss_slot(struct kprobe *p)
 
 	p->ainsn.api.restore = (unsigned long)p->addr + offset;
 
-	patch_text(p->ainsn.api.insn, &p->opcode, 1);
-	patch_text((void *)((unsigned long)(p->ainsn.api.insn) + offset),
-		   &insn, 1);
+	patch_text_nosync(p->ainsn.api.insn, &p->opcode, 1);
+	patch_text_nosync(p->ainsn.api.insn + offset, &insn, 1);
 }
 
 static void __kprobes arch_prepare_simulate(struct kprobe *p)
-- 
2.43.1