Trouble getting LVM Snapshots w/ ext3 working on TSL 2.2

Hello,

I have some trouble getting LVM snapshots to work with ext3 filesystems 
on a TSL 2.2 Box (Running Kernel 2.4.33.3-2tr).

A snapshot taken from a mounted volume can not be mounted because the 
filesystem's need_recovery flag is set and the snapshot is read-only.

I create a snapshot with the following command:

  # lvcreate -L10G -s -n backup /dev/vg00/lvm00
  lvcreate -- WARNING: the snapshot will be automatically disabled once 
it gets full
  lvcreate -- INFO: using default snapshot chunk size of 64 KB for 
"/dev/vg00/backup"
  lvcreate -- doing automatic backup of "vg00"
  lvcreate -- logical volume "/dev/vg00/backup" successfully created

Mounting the snapshot throws the following error:

  # mount /dev/vg00/backup /mnt/lvm-snapshot/
  mount: block device /dev/vg00/backup is write-protected, mounting 
read-only
  mount: wrong fs type, bad option, bad superblock on /dev/vg00/backup,
        or too many mounted file systems

Searching online I read that i have to change a line in the kernel source:

 > The other problem of ext3 and resierfs not being able to mount
 > a snapshot was
 > fixed by changing the following line in "linux/drives/md/lvm.c" from:
 >
 > /* lvm_do_lv_create calls fsync_dev_lockfs()/unlockfs() */
 > /* #define LVM_VFS_ENHANCEMENT */
 >
 > to:
 >
 > /* lvm_do_lv_create calls fsync_dev_lockfs()/unlockfs() */
 > #define LVM_VFS_ENHANCEMENT

I have done that, but now I am not able to compile the kernel, i gives 
me the following error:

  drivers/md/mddev.o(.text+0x83a9): In function `lvm_do_lv_create':
  : undefined reference to `unlockfs'
  drivers/md/mddev.o(.text+0x83ee): In function `lvm_do_lv_create':
  : undefined reference to `fsync_dev_lockfs'
  make: *** [vmlinux] Error 1

I have also downloaded the LVM 1.0.8 Sourcecode and issued "make" in the 
PATCHES directory to create a Patch against the kernel-tree - applying 
the auto-created patch (lvm-1.0.8-2.4.33.3-2tr.patch) doesn't solve the 
problem and I also tried to apply the 2.4.20-VFS-lock.patch but it 
doesn't apply clean and some hunks fail completly. I also tried applying 
the patched in different orders or not at all, but as soon as I 
uncomment the #define LVM_VFS_ENHANCEMENT the kernel-build will fail.

Does anyone has a hint for me how to solve this problem, so that I can 
mount my snapshots?

Thanks a lot,

Arne Brodowski