diff options
| author | Samuel Holland <samuel.holland@sifive.com> | 2024-03-27 09:04:42 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-09-12 11:11:30 +0200 |
| commit | 1741021fc1209125a8155de5f4184685f98fbdb7 (patch) | |
| tree | 952e432ab823cf9cedb5c06771714ea44d785b38 /arch | |
| parent | d670934d4fc9981e0a8b4eb571a634ca55fbd532 (diff) | |
riscv: kprobes: Use patch_text_nosync() for insn slots
[ Upstream commit b1756750a397f36ddc857989d31887c3f5081fb0 ]
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>
Link: https://lore.kernel.org/r/20240327160520.791322-4-samuel.holland@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/riscv/kernel/probes/kprobes.c | 5 |
1 files 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) |