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From: John Baldwin <jhb@freebsd.org>
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Cc: Attilio Rao <attilio@freebsd.org>, Konstantin Belousov <kib@freebsd.org>
Subject: Re: [PATCH] VFS KPI/API versioning
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On Friday 28 August 2009 10:04:55 pm Attilio Rao wrote:
> Often I found as it would have been useful to verify, mostly at
> run-time, of a feature of the VFS was supported and I quickly thought
> that having a run-time check for VFS versioning would not be a bad
> idea.
> In order to do that, I made the following patch:
> http://www.freebsd.org/~attilio/vfs_modload.diff

You don't have to have an actual DECLARE_MODULE() to use MODULE_VERSION().  
Given that, you can simplify this patch down to a single line that just adds 
the MODULE_VERSION().

-- 
John Baldwin