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SubjectRe: [PATCH V3] xtensa: patch_text: Fixup last cpu should be master
On Wed, Apr 6, 2022 at 7:28 AM <guoren@kernel.org> wrote:
>
> From: Guo Ren <guoren@linux.alibaba.com>
>
> 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@linux.alibaba.com>
> Signed-off-by: Guo Ren <guoren@kernel.org>
> Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
> Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
> Cc: <stable@vger.kernel.org>
> ---
> arch/xtensa/kernel/jump_label.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)

Thanks. Applied to my xtensa tree.

-- Max

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