linux-kernel - Re: May the worker function free its struct

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Date:	Tue, 11 May 2010 09:27:56 +0800
From:	Yong Zhang <yong.zhang@...driver.com>
To:	Leon Woestenberg <leon.woestenberg@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: May the worker function free its struct_work (plus container)?

On Mon, May 10, 2010 at 12:18:38PM +0200, Leon Woestenberg wrote:
> Thanks. Is there API documentation or source code documentation that
> confirms this is the case?

static void run_workqueue(struct cpu_workqueue_struct *cwq)
{
	....

#ifdef CONFIG_LOCKDEP
		/*
		 * It is permissible to free the struct work_struct
		 * from inside the function that is called from it,
		 * this we need to take into account for lockdep too.
		 * To avoid bogus "held lock freed" warnings as well
		 * as problems when looking into work->lockdep_map,
		 * make a copy and use that here.
		 */
		struct lockdep_map lockdep_map = work->lockdep_map;
#endif
	....
}

I think the above comments in run_workqueue() can reflect that
from a certain point.

Thanks,
Yong
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