netdev - Re: Getting the new RxRPC patches upstream

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Date:	Wed, 25 Apr 2007 14:41:45 +0400
From:	Oleg Nesterov <oleg@...sign.ru>
To:	David Howells <dhowells@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>, ebiederm@...ssion.com,
	containers@...ts.osdl.org, hch@...radead.org,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: Getting the new RxRPC patches upstream

On 04/25, David Howells wrote:
>
> Oleg Nesterov <oleg@...sign.ru> wrote:
> 
> > Yes sure. Note that this is documented:
> > 
> > 	/*
> > 	 * Kill off a pending schedule_delayed_work().  Note that the work callback
> > 	 * function may still be running on return from cancel_delayed_work().  Run
> > 	 * flush_workqueue() or cancel_work_sync() to wait on it.
> > 	 */
> 
> No, it isn't documented.  It says that the *work* callback may be running, but
> does not mention the timer callback.  However, just looking at the
> cancellation function source made it clear that this would wait for the timer
> handler to return first.

Ah yes, it says nothing about what the returned value means...

> However, is it worth just making cancel_delayed_work() a void function and not
> returning anything?  I'm not sure the return value is very useful.

cancel_rearming_delayed_work() needs this, tty_io.c, probably somebody else.

Oleg.

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