Re: [PATCH V3] xtensa: patch_text: Fixup last cpu should be master

[Max Filippov]

On Wed, Apr 6, 2022 at 7:28 AM <guoren@xxxxxxxxxx> wrote:
>
> From: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
>
> These patch_text implementations are using stop_machine_cpuslocked
> infrastructure with atomic cpu_count. The original idea: When the
> master CPU patch_text, the others should wait for it. But current
> implementation is using the first CPU as master, which couldn't
> guarantee the remaining CPUs are waiting. This patch changes the
> last CPU as the master to solve the potential risk.
>
> Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
> Signed-off-by: Guo Ren <guoren@xxxxxxxxxx>
> Reviewed-by: Max Filippov <jcmvbkbc@xxxxxxxxx>
> Reviewed-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx>
> ---
>  arch/xtensa/kernel/jump_label.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Thanks. Applied to my xtensa tree.

-- Max