Re: Race with netdevice unregister and dst_dev_event

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   From: Stephen Hemminger <shemminger@osdl.org>
   Date: Mon, 28 Apr 2003 16:35:57 -0700

   So unless dst.c is fixed, there needs to be a rule NEVER use
   dev->destructor in network modules.

I don't understand what the problem is.

Look, this code in the DST cache merely puts the device (which is
legal from any context) if the device lacks a destructor.

If it has a destructor, it keeps the reference and once the DST entry
dies the dst->dev is dev_put().  So it does in fact do the "cleanup"
contrary to what you say, this happens during dst entry garbage
collection.

If the dst has a dst->dev attached, the device has a reference
and thus so does your module which created the device and thus
your module cannot be unloaded.

So to reiterate, what exactly is the problem? :-)
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