[PATCH riscv/for-next 4/4] riscv: ftrace: do not use stop_machine to update code

[Andy Chiu]

On Thu, Jun 9, 2022 at 3:21 PM Andy Chiu <andy.chiu at sifive.com> wrote:
>
> Now it is safe to remove dependency from stop_machine() to patch code in
> ftrace.
>
> Signed-off-by: Andy Chiu <andy.chiu at sifive.com>
> Reviewed-by: Greentime Hu <greentime.hu at sifive.com>
> Reviewed-by: Zong Li <zong.li at sifive.com>
> Acked-by: Steven Rostedt (Google) <rostedt at goodmis.org>
> ---
>  arch/riscv/kernel/ftrace.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/arch/riscv/kernel/ftrace.c b/arch/riscv/kernel/ftrace.c
> index a6eb1b1ac093..a00326b41795 100644
> --- a/arch/riscv/kernel/ftrace.c
> +++ b/arch/riscv/kernel/ftrace.c
> @@ -12,6 +12,11 @@
>  #include <asm/patch.h>
>
>  #ifdef CONFIG_DYNAMIC_FTRACE
> +void arch_ftrace_update_code(int command)
> +{
> +       ftrace_modify_all_code(command);
> +}
> +
>  void ftrace_arch_code_modify_prepare(void) __acquires(&text_mutex)
>  {
>         mutex_lock(&text_mutex);
> --
> 2.36.0
>

Loop in: Guo Ren