linux-kernel - Re: [PATCH 2/4] workqueue: Split apply attrs code from its locking

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Message-ID: <20140424144832.GD14460@htj.dyndns.org>
Date:	Thu, 24 Apr 2014 10:48:32 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Christoph Lameter <cl@...ux.com>,
	Kevin Hilman <khilman@...aro.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Mike Galbraith <bitbucket@...ine.de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Viresh Kumar <viresh.kumar@...aro.org>
Subject: Re: [PATCH 2/4] workqueue: Split apply attrs code from its locking

On Thu, Apr 24, 2014 at 04:37:34PM +0200, Frederic Weisbecker wrote:
> +static int apply_workqueue_attrs_locked(struct workqueue_struct *wq,
> +					const struct workqueue_attrs *attrs)
>  {
>  	struct workqueue_attrs *new_attrs, *tmp_attrs;
>  	struct pool_workqueue **pwq_tbl, *dfl_pwq;
> @@ -3976,15 +3960,6 @@ int apply_workqueue_attrs(struct workqueue_struct *wq,
>  	copy_workqueue_attrs(tmp_attrs, new_attrs);
>  
>  	/*
> -	 * CPUs should stay stable across pwq creations and installations.
> -	 * Pin CPUs, determine the target cpumask for each node and create
> -	 * pwqs accordingly.
> -	 */
> -	get_online_cpus();
> -
> -	mutex_lock(&wq_pool_mutex);

lockdep_assert_held()

Thanks.

-- 
tejun
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