From: Mark Harris <mhlk-gcwzot8L0og@public.gmane.org>
Subject: Re: [PATCH 02/18] xstat: Add a pair of system calls to make
	extended file stats available [ver #6]
Date: Thu, 15 Jul 2010 23:22:51 -0700
Message-ID: <20100716062251.GA9318@zoia.osj.us>
References: <201007152235.22373.arnd@arndb.de> <20100715021709.5544.64506.stgit@warthog.procyon.org.uk> <20100715021712.5544.44845.stgit@warthog.procyon.org.uk> <30646.1279230807@redhat.com>
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> struct xstat_time {
> 	unsigned long long	tv_sec, tv_nsec;
> };

unsigned?  Existing filesystems support on-disk timestamps
representing times prior to the epoch.