linux-kernel - Re: [PATCH 1/3] net/bridge/br_if.c: don't use _WORK

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Message-ID: <20070219150445.GC75@tv-sign.ru>
Date:	Mon, 19 Feb 2007 18:04:45 +0300
From:	Oleg Nesterov <oleg@...sign.ru>
To:	Jarek Poplawski <jarkao2@...pl>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>,
	David Howells <dhowells@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] net/bridge/br_if.c: don't use _WORK_NAR

On 02/19, Jarek Poplawski wrote:
>
> On Mon, Feb 19, 2007 at 03:03:53PM +0300, Oleg Nesterov wrote:
> > On 02/19, Jarek Poplawski wrote:
> ...
> > kfree() doesn't check WORK_STRUCT_PENDING, it makes no
> > difference if it is set or not when work->func() runs.
> 
> It looks like it's to be checked before kfree.

Here,
	br_add_if:

		schedule_delayed_work(&p->carrier_check, BR_PORT_DEBOUNCE);

schedule_delayed_work() fails if this bit is set. So the only difference with
this patch is:

	before:
		schedule_delayed_work() fails unless port_carrier_check() passed
		work_release() (before rtnl_lock())

	after:
		schedule_delayed_work() fails unless run_workqueue() cleared this
		bit (before calling port_carrier_check())

> > We are going to kill _NAR stuff.
> 
> If you're sure nobody uses this in any way then it
> seems the right decision.

Yes, this series converts all users.

Oleg.

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