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From: Ed Maste <emaste@freebsd.org>
Date: Fri, 30 Jan 2015 13:22:30 -0500
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Subject: Re: svn commit: r277908 - head/share/man/man9
To: Benjamin Kaduk <bjkfbsd@gmail.com>
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On 29 January 2015 at 22:34, Benjamin Kaduk <bjkfbsd@gmail.com> wrote:
>
> Wouldn't it be like a two-line patch to change contigfree(9) to permit NULL
> as an argument?

It would.

> Would it be better to do that?

Perhaps, although contigmalloc / contigfree have a smallish set of
distinct use cases and existing code does not expect it can pass NULL.
I didn't want to add the test just for consistency with free().