linux-kernel - Re: [PATCH] rcu-tasks: Remove unused trc

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Message-ID: <20220610183543.GJ1790663@paulmck-ThinkPad-P17-Gen-1>
Date:   Fri, 10 Jun 2022 11:35:43 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Zqiang <qiang1.zhang@...el.com>
Cc:     frederic@...nel.org, rcu@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rcu-tasks: Remove unused trc_wait and holdouts

On Fri, Jun 10, 2022 at 02:22:28PM +0800, Zqiang wrote:
> Remove unused trc_wait waitqueue and local holdouts list.
> 
> Signed-off-by: Zqiang <qiang1.zhang@...el.com>

Good eyes, thank you!  I will fold this into the original commit
with attribution.

							Thanx, Paul

> ---
>  kernel/rcu/tasks.h | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h
> index 55e76db8b0d3..fcbd0ec33c86 100644
> --- a/kernel/rcu/tasks.h
> +++ b/kernel/rcu/tasks.h
> @@ -1190,8 +1190,6 @@ EXPORT_SYMBOL_GPL(rcu_trace_lock_map);
>  
>  #ifdef CONFIG_TASKS_TRACE_RCU
>  
> -static DECLARE_WAIT_QUEUE_HEAD(trc_wait);	// List of holdout tasks.
> -
>  // Record outstanding IPIs to each CPU.  No point in sending two...
>  static DEFINE_PER_CPU(bool, trc_ipi_to_cpu);
>  
> @@ -1641,7 +1639,6 @@ static void rcu_tasks_trace_empty_fn(void *unused)
>  static void rcu_tasks_trace_postgp(struct rcu_tasks *rtp)
>  {
>  	int cpu;
> -	LIST_HEAD(holdouts);
>  
>  	// Wait for any lingering IPI handlers to complete.  Note that
>  	// if a CPU has gone offline or transitioned to userspace in the
> -- 
> 2.25.1
>