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From: Chris Wright <chris@wirex.com>
To: Greg KH <greg@kroah.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [RFC] PCI device list locking - take 2
Date: Wed, 18 Jun 2003 17:20:07 -0700	[thread overview]
Message-ID: <20030618172007.C20182@figure1.int.wirex.com> (raw)
In-Reply-To: <20030618235232.GA2667@kroah.com>; from greg@kroah.com on Wed, Jun 18, 2003 at 04:52:32PM -0700

* Greg KH (greg@kroah.com) wrote:
> On Wed, Jun 18, 2003 at 04:32:37PM -0700, Chris Wright wrote:
> > I'm not sure testing a valid ->next makes sense.  It could be non-NULL,
> > but poison, or if it was using list_del_init, it would be stuck in loop.
> 
> When we take the devices off of the list, after list_del(), still under
> the lock, we can null out the list pointers.  Then, later under the
> lock, we can check the pointer before we move to it.  We aren't doing
> fancy list_* functions with the pci device lists at all.

Ah, ok, that should work.

thanks,
-chris
-- 
Linux Security Modules     http://lsm.immunix.org     http://lsm.bkbits.net

      reply	other threads:[~2003-06-19  0:08 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-06-18 21:29 [RFC] PCI device list locking - take 2 Greg KH
2003-06-18 22:33 ` Chris Wright
2003-06-18 22:46   ` Greg KH
2003-06-18 23:32     ` Chris Wright
2003-06-18 23:52       ` Greg KH
2003-06-19  0:20         ` Chris Wright [this message]

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