diff mbox series

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

Message ID 20220609071833.1051941-5-andy.chiu@sifive.com (mailing list archive)
State New, archived
Headers show
Series Enable ftrace with kernel preemption for RISC-V | expand

Commit Message

Andy Chiu June 9, 2022, 7:18 a.m. UTC 
Now it is safe to remove dependency from stop_machine() to patch code in
ftrace.

Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Reviewed-by: Greentime Hu <greentime.hu@sifive.com>
Reviewed-by: Zong Li <zong.li@sifive.com>
Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 arch/riscv/kernel/ftrace.c | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Andy Chiu June 16, 2022, 8:59 a.m. UTC | #1 
On Thu, Jun 9, 2022 at 3:21 PM Andy Chiu <andy.chiu@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@sifive.com>
> Reviewed-by: Greentime Hu <greentime.hu@sifive.com>
> Reviewed-by: Zong Li <zong.li@sifive.com>
> Acked-by: Steven Rostedt (Google) <rostedt@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
diff mbox series

Patch

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);