Can't remove 'noatime' on mounted filesystem on CURRENT

Hello,

I originally posted about it _at_questions [1] but now I think there's a
bug in CURRENT somewhere. System is yesterday's FreeBSD 7.0-CURRENT i386

It seems to be impossible to remove 'noatime' property on mounted
filesystem (via -u option):

# mount | grep ad0s3e
/dev/ad0s3e on /data (ufs, local, noexec, nosuid, soft-updates)
# mount -u -o noatime /data
# mount | grep ad0s3e
/dev/ad0s3e on /data (ufs, local, noatime, soft-updates)
# mount -u -o atime /data
# mount | grep ad0s3e
/dev/ad0s3e on /data (ufs, local, noatime, soft-updates)

This works on 6.2-RELEASE.

Btw, setting 'noatime' removes 'noexec' and 'nosuid' in above example.
Is this expected behaviour? Can't decide after reading mount(8).

Thanks in advance,

Karol

[1]
http://lists.freebsd.org/pipermail/freebsd-questions/2007-August/155138.html

-- 
Karol Kwiatkowski   <karol.kwiat at gmail dot com>
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