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References: <20220406141649.728971-1-guoren@kernel.org> <Yk3YUFfvEszb+cXT@kroah.com>
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From:   Guo Ren <guoren@kernel.org>
Date:   Thu, 7 Apr 2022 14:33:17 +0800
Message-ID: <CAJF2gTQH-cnTx_x3xO=UZRTrhewb0damO_cqtPxhxoZe6bxr8g@mail.gmail.com>
Subject: Re: [PATCH V3] riscv: patch_text: Fixup last cpu should be master
To:     Greg KH <gregkh@linuxfoundation.org>
Cc:     Arnd Bergmann <arnd@arndb.de>, Palmer Dabbelt <palmer@dabbelt.com>,
        linux-arch <linux-arch@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-riscv <linux-riscv@lists.infradead.org>,
        Guo Ren <guoren@linux.alibaba.com>,
        Palmer Dabbelt <palmer@rivosinc.com>,
        Masami Hiramatsu <mhiramat@kernel.org>, stable@vger.kernel.org
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On Thu, Apr 7, 2022 at 2:13 AM Greg KH <gregkh@linuxfoundation.org> wrote:
>
> On Wed, Apr 06, 2022 at 10:16:49PM +0800, 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>
> > Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
> > Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
> > Cc: <stable@vger.kernel.org>
> > ---
> >  arch/riscv/kernel/patch.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
>
> What commit id does this change fix?
Thx for pointing this out, I would follow the rule to add Cc:
<stable@vger.kernel.org>.

>


-- 
Best Regards
 Guo Ren

ML: https://lore.kernel.org/linux-csky/