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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] vlan: set sysfs device_type to 'vlan'
Date: Mon, 05 Nov 2012 01:44:37 -0500 (EST)
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From: Doug Goldstein <cardoe@cardoe.com>
Date: Mon, 5 Nov 2012 00:19:19 -0600

> By this argument we shouldn't ever improve any API or add new syscalls
> since we'll have to have fallback code to handle the old interfaces
> when the new ones aren't available.

It makes sense to add new APIs when existing mechanisms are too
difficult _AND_ code doesn't already exist that works reasonable well
with existing facilities.