[issue1537] null mount does not accept -o update

Stathis Kamperis <[e-mail]> added the comment:

> I noticed that I can't remount nullfs by mount(8).  The patched
> mount_null accepts only one argument (the mountpoint to be remounted)
> when MNT_UPDATE is specified either by -u or by -o update, but
> what mount(8) passes to filesystem-specific mount commands like this:
>   # mount -ur /mnt/pt
>   -> mount_${foo} -o ro -o update /path/to/special /mnt/pt
>   # mount -uw /mnt/pt
>   -> mount_${foo} -o noro -o update /path/to/special /mnt/pt
>=20
> I think that the following patch on top of yours does this for you,
> although I only tested it slightly.

I'm in the middle of a build. Once it finishes, I'll apply your modificatio=
ns on
top of my patch & re-run all the tests I've done so far, plus your test cas=
es
that involve mount(8).

If everything works and given that Dillon didn't object, I'll push it in th=
e
next couple of days.

Thanks!

Cheers,
Stathis

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