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Date: Fri, 29 May 2009 19:10:37 +0100 (BST)
From: Robert Watson <rwatson@FreeBSD.org>
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To: Attilio Rao <attilio@freebsd.org>
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Cc: svn-src-head@freebsd.org, Scott Long <scottl@samsco.org>,
	src-committers@freebsd.org, Edward Tomasz Napierala <trasz@freebsd.org>,
	svn-src-all@freebsd.org
Subject: Re: svn commit: r193041 - head/sys/sys
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On Fri, 29 May 2009, Attilio Rao wrote:

> 2009/5/29 Scott Long <scottl@samsco.org>:
>> Occasionally it's useful to be able to run older binaries on newer kernels.
>>  One particularly useful place is for making releases.  Does this change to 
>> struct mount break that?  If so, could there be any other way to achieve 
>> what you want without the breakage?
>
> The struct mount is only accessible by the kernel so it doesn't break 
> userspace binary compatibility.

However, __FreeBSD_version does need to be bumped and UPDATING updated, since 
this change will break file system modules compiled against kernels using 
older versions of struct mount.

Robert N M Watson
Computer Laboratory
University of Cambridge