gjournal on 6.x wont build

[Vince]

Hi all,
	I was intending on trying out gjournal on a new disk i've added in my
desktop. I had a look to see what the most recent patch provided by
Pawel and found
http://people.freebsd.org/~pjd/patches/gjournal6_20061024.patch
I created the directories as per Pawel's original post
(http://lists.freebsd.org/pipermail/freebsd-fs/2006-June/001962.html)
and the patch succeeded with no failed hunks, however adding
options 	GEOM_JOURNAL	
options 	UFS_GJOURNAL

to my kernel config
then doing a make buildkernel KERNCONF=MYKERNELCONF

errors out with
/journal/g_journal.c
/usr/src/sys/geom/journal/g_journal.c: In function `g_journal_do_switch':
/usr/src/sys/geom/journal/g_journal.c:2872: error: structure has no
member named `mnt_gjprovider'
/usr/src/sys/geom/journal/g_journal.c:2885: error: structure has no
member named `mnt_gjprovider'
/usr/src/sys/geom/journal/g_journal.c:2890: error: structure has no
member named `mnt_gjprovider'
*** Error code 1

This is on a recent 6-stable system
6.2-PRERELEASE #1: Fri Nov 10 14:31:47 GMT 2006
any idea what ive done wrong ?

Cheers,
Vince