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Date: Tue, 25 Sep 2012 11:02:35 -0700
From: Tejun Heo <tj@kernel.org>
To: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, Alex Dubov <oakad@yahoo.com>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 memstick: support for legacy sony memsticks
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Hello,

> * Swithced to using a workqueue.
>   Unfortunelly, I still see that workqueue items are executed in parallel
>   I suspect that this happens if one work item sleeps. In this case I
>   don't want other work items to run too. I fixed this with a mutex, and anyway
>   it nice to have it to guaranteee this.

You can use alloc_ordered_workqueue("namefmt", WQ_MEM_RECLAIM).  No
mutex needed for inter-work exclusion.

Thanks.

-- 
tejun