lkml.org 
[lkml]   [2024]   [Mar]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 3/7] riscv: kprobes: Use patch_text_nosync() for insn slots
Date
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

\
 
 \ /
  Last update: 2024-05-27 16:12    [W:0.095 / U:0.176 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site