linux-kernel - Re: [PATCH 2/3] rcu: Remove stale comment in tree.c

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Message-ID: <20140715225313.GB24290@cloud>
Date:	Tue, 15 Jul 2014 15:53:13 -0700
From:	josh@...htriplett.org
To:	Pranith Kumar <bobby.prani@...il.com>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	"open list:READ-COPY UPDATE..." <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] rcu: Remove stale comment in tree.c

On Tue, Jul 15, 2014 at 06:31:48PM -0400, Pranith Kumar wrote:
> This commit removes a stale comment in rcu/tree.c.
> FYI, an updated comment exists a few lines below this.
> 
> Signed-off-by: Pranith Kumar <bobby.prani@...il.com>

In general, when removing a stale comment, I'd suggest explaining why
the comment is stale.  Was code removed without removing the
corresponding comment, or was code changed such that the comment no
longer applies, or...?

- Josh Triplett

>  kernel/rcu/tree.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
> index a1abaa8..e67246e 100644
> --- a/kernel/rcu/tree.c
> +++ b/kernel/rcu/tree.c
> @@ -2211,8 +2211,6 @@ static void rcu_cleanup_dead_cpu(int cpu, struct rcu_state *rsp)
>  	/* Adjust any no-longer-needed kthreads. */
>  	rcu_boost_kthread_setaffinity(rnp, -1);
>  
> -	/* Remove the dead CPU from the bitmasks in the rcu_node hierarchy. */
> -
>  	/* Exclude any attempts to start a new grace period. */
>  	mutex_lock(&rsp->onoff_mutex);
>  	raw_spin_lock_irqsave(&rsp->orphan_lock, flags);
> -- 
> 1.9.1
> 
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