[Devel] [PATCH 1/1] Dynamically allocate the loopback device

Denis V. Lunev dlunev at gmail.com
Fri Aug 24 14:24:29 PDT 2007

no, and this is important. Loopback is initialized in fs_initcall which
is called sufficiently before module_init.

I have checked the code and do not see initialization order mistakes
right now. But, from now on, maintainer should pay attention for this
unfortunate consequence :(


Stephen Hemminger wrote:
> On Fri, 24 Aug 2007 19:55:47 +0400
> "Denis V. Lunev" <dlunev at gmail.com> wrote:
>> dlezcano at fr.ibm.com wrote:
>>> From: Daniel Lezcano <dlezcano at fr.ibm.com>
>>> Doing this makes loopback.c a better example of how to do a
>>> simple network device, and it removes the special case
>>> single static allocation of a struct net_device, hopefully
>>> making maintenance easier.
>>> Applies against net-2.6.24
>>> Tested on i386, x86_64
>>> Compiled on ia64, sparc
>> I think that a small note, that initialization order is changed will be
>> good to record. After this, loopback MUST be allocated before any other
>> networking subsystem initialization. And this is an important change.
>> Regards,
>>     Den
> Yes, this code would break when other drivers are directly linked
> in. 
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