linux-kernel - Re: [PATCH 1/4] workqueue: introduce get_pwq

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Message-ID: <20150604010454.GJ20091@mtj.duckdns.org>
Date:	Thu, 4 Jun 2015 10:04:54 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] workqueue: introduce get_pwq_unlocked()

Hello,

On Wed, Jun 03, 2015 at 10:29:49PM +0800, Lai Jiangshan wrote:
> attrs management code may reuse existed pwq and it has open code

                                  existing

> to do "lock();get_pwq();unlock()", we move this open code into
> get_pwq_unlocked().
> 
> get_pwq_unlocked() will also be used in later patches to allow
> apply_wqattrs_prepare() to resue the original default or per-node pwq.

                             reuse

>  /**
> + * get_pwq_unlocked - get_pwq() with surrounding pool lock/unlock
> + * @pwq: pool_workqueue to get (should not %NULL)

                                   should not be %NULL

> + *
> + * get_pwq() with locking.  The caller should have at least an owned
> + * reference on @pwq to match the guarantees required by get_pwq().

      The caller should have a reference on @pwq.

Thanks.

-- 
tejun
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