linux-kernel - Re: [PATCH] rcu: make nocb_nobypass_lim_per

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Date:   Wed, 24 Feb 2021 16:44:30 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Cc:     josh@...htriplett.org, rostedt@...dmis.org,
        mathieu.desnoyers@...icios.com, jiangshanlai@...il.com,
        joel@...lfernandes.org, rcu@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rcu: make nocb_nobypass_lim_per_jiffy static

On Wed, Feb 24, 2021 at 04:30:29PM +0800, Jiapeng Chong wrote:
> Fix the following sparse warning:
> 
> kernel/rcu/tree_plugin.h:1497:5: warning: symbol
> 'nocb_nobypass_lim_per_jiffy' was not declared. Should it be static?
> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>

Queued with Frederic's ack (given offlist), thank you both!

						Thanx, Paul

> ---
>  kernel/rcu/tree_plugin.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
> index 2d60377..8ff8cf8 100644
> --- a/kernel/rcu/tree_plugin.h
> +++ b/kernel/rcu/tree_plugin.h
> @@ -1494,7 +1494,7 @@ static int __init parse_rcu_nocb_poll(char *arg)
>   * After all, the main point of bypassing is to avoid lock contention
>   * on ->nocb_lock, which only can happen at high call_rcu() rates.
>   */
> -int nocb_nobypass_lim_per_jiffy = 16 * 1000 / HZ;
> +static int nocb_nobypass_lim_per_jiffy = 16 * 1000 / HZ;
>  module_param(nocb_nobypass_lim_per_jiffy, int, 0);
>  
>  /*
> -- 
> 1.8.3.1
>