linux-kernel - Re: [PATCH] x86: call stop_machine_text

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Message-ID: <4EAA1357.8060802@hitachi.com>
Date:	Fri, 28 Oct 2011 11:28:39 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Rabin Vincent <rabin@....in>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Jason Baron <jbaron@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH] x86: call stop_machine_text_poke() on all CPUs

(2011/10/27 16:54), Rabin Vincent wrote:
> It appears that stop_machine_text_poke() wants to be called on all CPUs,
> like it's done from text_poke_smp().  Fix text_poke_smp_batch() to do
> this.

cpu_mask==NULL finally falls back to cpu_online_mask, but even though
it should be specified correctly.

Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>

Thank you!

> 
> Cc: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
> Cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
> Cc: Jason Baron <jbaron@...hat.com>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Signed-off-by: Rabin Vincent <rabin@....in>
> ---
>  arch/x86/kernel/alternative.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
> index c638228..1f84794 100644
> --- a/arch/x86/kernel/alternative.c
> +++ b/arch/x86/kernel/alternative.c
> @@ -738,5 +738,5 @@ void __kprobes text_poke_smp_batch(struct text_poke_param *params, int n)
>  
>  	atomic_set(&stop_machine_first, 1);
>  	wrote_text = 0;
> -	__stop_machine(stop_machine_text_poke, (void *)&tpp, NULL);
> +	__stop_machine(stop_machine_text_poke, (void *)&tpp, cpu_online_mask);
>  }


-- 
Masami HIRAMATSU
Software Platform Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@...achi.com
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