[PATCH 3/7] riscv: kprobes: Use patch_text_nosync() for insn slots

Samuel Holland
2024-02-12T02:55:41Z

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

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
---

arch/riscv/kernel/probes/kprobes.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/riscv/kernel/probes/kprobes.c b/arch/riscv/kernel/probes/kprobes.c
index 2f08c14a933d..cbf8197072bf 100644
--- a/arch/riscv/kernel/probes/kprobes.c
+++ b/arch/riscv/kernel/probes/kprobes.c
@@ -28,9 +28,9 @@ 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)
--
2.43.0