linux-kernel - Re: [RFC PATCH 3/5] kernel/rcu/tree_plugin.h:990 fix a sparse warning

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Message-ID: <20140626193926.GZ4603@linux.vnet.ibm.com>
Date:	Thu, 26 Jun 2014 12:39:26 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Pranith Kumar <bobby.prani@...il.com>
Cc:	linux-kernel@...r.kernel.org, Josh Triplett <josh@...htriplett.org>
Subject: Re: [RFC PATCH 3/5] kernel/rcu/tree_plugin.h:990 fix a sparse warning

On Wed, Jun 11, 2014 at 04:39:41PM -0400, Pranith Kumar wrote:
> kernel/rcu/tree_plugin.h:990:13: warning: context imbalance in 'rcu_report_unblock_qs_rnp' - unexpected unlock
> 
> by annotating the function with __releases()
> 
> Signed-off-by: Pranith Kumar <bobby.prani@...il.com>

Hearing no objections, I have queued this for 3.17.

							Thanx, Paul

> ---
>  kernel/rcu/tree_plugin.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
> index 0c955d9..9f85469 100644
> --- a/kernel/rcu/tree_plugin.h
> +++ b/kernel/rcu/tree_plugin.h
> @@ -988,6 +988,7 @@ static int rcu_preempt_blocked_readers_cgp(struct rcu_node *rnp)
> 
>  /* Because preemptible RCU does not exist, no quieting of tasks. */
>  static void rcu_report_unblock_qs_rnp(struct rcu_node *rnp, unsigned long flags)
> +	__releases(rnp->lock)
>  {
>  	raw_spin_unlock_irqrestore(&rnp->lock, flags);
>  }
> -- 
> 1.9.1
> 

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